{
  "data": {
    "a": {
      "slug": "cola2",
      "name": "Cola2",
      "vendor": "ByteDance (Seed)",
      "vendorUrl": "https://github.com/ByteDance-Seed",
      "kind": "weights",
      "category": "open-weights",
      "summary": "Cola2 is a research checkpoint from ByteDance Seed, a base language model of 8.8B parameters that generates text through continuous latents with a diffusion transformer and a token decoder. Not a chat model, and the weights carry no stated licence.",
      "url": "https://www.anchorterminal.com/tools/cola2",
      "markdownUrl": "https://www.anchorterminal.com/tools/cola2.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cola2.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cola2.json",
      "dns": "cola2.grade.anchorterminal.com",
      "repo": "https://huggingface.co/ByteDance-Seed/Cola2",
      "license": "None stated for the weights (the code is Apache 2.0)",
      "transports": [],
      "packages": [
        {
          "registry": "huggingface",
          "name": "ByteDance-Seed/Cola2"
        }
      ],
      "auth": "none",
      "authNotes": "The weights download from Hugging Face with no account, token or terms to accept. The repository is not gated (checked 2026-11-10).",
      "pricing": "free",
      "pricingNotes": "Free to download, but nothing says what you may do with the weights. The card says the code is Apache 2.0 and that the weights remain subject to their respective terms, without naming them. Running it yourself costs the hardware: 35.1 GB of F32 files, loaded as BF16 in the card's example (checked 2026-11-10).",
      "priceSummary": "Free",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "Weights you download and run yourself, so there is nothing to pay per call and no payment protocol (checked 2026-11-10).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-11-10"
      },
      "docsUrl": "https://github.com/ByteDance-Seed/Cola2",
      "capabilities": [
        "model.open-weights"
      ],
      "tags": [
        "open-weights",
        "model",
        "base-model",
        "research",
        "diffusion",
        "continuous-latent",
        "no-licence",
        "safetensors",
        "custom-code",
        "self-hosted"
      ],
      "lastRelease": "2026-11-06",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 33.9,
        "grade": "F",
        "agentReady": false,
        "rank": 0,
        "ranked": false,
        "notRankedWhy": "An open-weight model, graded by the open-weight checklist and ranked among open-weight models, not against tools",
        "rankOf": 1518,
        "categoryRank": 113,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "interface": 20,
          "reach": 25,
          "risk": 40,
          "upkeep": 58
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "low",
          "date": "2026-11-10"
        },
        "negative": 0,
        "verdict": "A research release, and an honest one: ByteDance Seed says it's a base model with an unconverged latent stage, scoring below Llama-3-8B on its own table. It's here for people studying continuous-latent generation. Agents can't use it as a model: 32-token completions, no chat or tools, the repository's own code to load it, and no licence on the weights.",
        "bestFor": "Researchers working on latent or diffusion language models who want a checkpoint to study",
        "strengths": [
          "A documented new architecture with a paper and a reproduction protocol",
          "Evaluation data and checksums ship with the weights",
          "A security policy that points to ByteDance's security centre",
          "The model card says plainly what it isn't for"
        ],
        "weaknesses": [
          "No licence stated for the weights",
          "A base model: no chat, no tools, 32 new tokens by default",
          "Loads only with the repository's own Python, on Transformers 4.x",
          "35 GB of F32 files and no quantised build",
          "Below Llama-3-8B on the card's own eight-task table",
          "No stated context length or cut-off"
        ],
        "agentNotes": [
          "Don't plan to use this as your model. It completes short prompts and wasn't tuned to follow instructions",
          "Don't use it commercially on the strength of this listing. The weights have no stated licence",
          "If you study it, read modeling_cola2.py first: trust_remote_code runs it",
          "Pin Transformers below 5, as the card requires",
          "Pass a seeded torch.Generator to generate(). Output varies between runs even with greedy decoding",
          "Check the download with `sha256sum -c SHA256SUMS`"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "low",
            "grade": "F",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 33.9
          }
        ],
        "editorialScores": {
          "interface": 20,
          "reach": 25,
          "risk": 40,
          "upkeep": 58
        },
        "provenanceScore": 58,
        "checked": {
          "categories": {
            "interface": "2026-11-10",
            "reach": "2026-11-10",
            "risk": "2026-11-10",
            "upkeep": "2026-11-10"
          },
          "last": "2026-11-10",
          "oldest": "2026-11-10",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "install": "pip install \"torch\u003e=2.2\" \"transformers\u003e=4.51,\u003c5\" \"safetensors\u003e=0.4\" accelerate\n# then AutoModel.from_pretrained(\"ByteDance-Seed/Cola2\", trust_remote_code=True, torch_dtype=torch.bfloat16)\n# trust_remote_code runs the three Python files in the repository. Read them first",
        "http": "# No server. The model runs in process through Transformers, and the GitHub repository has a\n# command-line chat script (scripts/run_chat.sh) and a benchmark runner"
      },
      "letme": {
        "capability": "https://letme.dev/model.open-weights",
        "tool": "https://letme.dev/cola2"
      },
      "weights": {
        "trainedBy": "ByteDance Seed",
        "builtOn": "The decoder and encoder embedding are initialised from Qwen3-4B-Base, per the GitHub model card",
        "params": "8.8B",
        "goodFor": "Research on continuous-latent text generation: short completions, cloze and multiple-choice experiments, and reproducing the paper's numbers.",
        "runtimes": [],
        "builds": [
          {
            "name": "Cola2 (F32 safetensors)",
            "url": "https://huggingface.co/ByteDance-Seed/Cola2/tree/main",
            "who": "publisher",
            "precision": "f32",
            "sizeGB": 35.07,
            "memoryGB": 48,
            "format": "safetensors",
            "note": "Eight shards in 32-bit floats. The card's example loads them as BF16"
          }
        ],
        "run": "python -c \"from transformers import AutoModel; AutoModel.from_pretrained('ByteDance-Seed/Cola2', trust_remote_code=True)\"",
        "runBuild": "Cola2 (F32 safetensors)",
        "checked": "2026-11-10",
        "minMemoryGB": 48
      },
      "family": {
        "lab": "ByteDance (Seed)",
        "family": "Cola",
        "url": "https://www.anchorterminal.com/open-weights/#bytedance-seed",
        "others": [
          {
            "name": "Cola-DLM",
            "url": "https://huggingface.co/ByteDance-Seed/Cola-DLM"
          }
        ]
      },
      "area": "models",
      "provenance": {
        "legalEntity": "ByteDance, named in the GitHub repository's security policy. The legal entity wasn't looked up",
        "domain": "bytedance.com",
        "domainRegistered": "",
        "endpointOnVendorDomain": null,
        "terms": "",
        "privacy": "",
        "statusPage": "",
        "changelog": "https://huggingface.co/ByteDance-Seed/Cola2/commits/main",
        "securityTxt": "unknown",
        "checked": "2026-11-10",
        "notes": [
          "The files are in the ByteDance-Seed organisation on Hugging Face and the code is in the ByteDance-Seed organisation on GitHub; each links the other.",
          "No licence is stated for the weights, so there are no terms to read.",
          "The domain's registration date and security.txt weren't looked up. The GitHub repository's SECURITY.md points to ByteDance's security centre.",
          "The changelog is the commit history, six commits on 6 November 2026."
        ],
        "score": 58
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/cola2.json"
    },
    "answer": "ZAYA1-8B scores 61 (C) on agent readiness against Cola2's 33.9 (F), and leads in 3 of 4 scored categories. Cola2 leads on documentation and upkeep.",
    "b": {
      "slug": "zaya1-8b",
      "name": "ZAYA1-8B",
      "vendor": "Zyphra",
      "vendorUrl": "https://www.zyphra.com",
      "kind": "weights",
      "category": "open-weights",
      "summary": "ZAYA1-8B is Zyphra's open-weight reasoning model, a mixture of experts of 8.4B parameters with 760M active, trained from scratch for maths and coding. Apache 2.0. Zyphra's 4-bit build is 5.9 GB. Released SGLang and Transformers run it.",
      "url": "https://www.anchorterminal.com/tools/zaya1-8b",
      "markdownUrl": "https://www.anchorterminal.com/tools/zaya1-8b.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/zaya1-8b.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/zaya1-8b.json",
      "dns": "zaya1-8b.grade.anchorterminal.com",
      "repo": "https://huggingface.co/Zyphra/ZAYA1-8B",
      "license": "Apache-2.0",
      "transports": [],
      "packages": [
        {
          "registry": "huggingface",
          "name": "Zyphra/ZAYA1-8B"
        },
        {
          "registry": "huggingface",
          "name": "Zyphra/ZAYA1-8B-FP8-Experts"
        },
        {
          "registry": "huggingface",
          "name": "Zyphra/ZAYA1-8B-MXFP4-Experts"
        }
      ],
      "auth": "none",
      "authNotes": "The weights download from Hugging Face with no account, token or terms to accept. None of the repositories is gated (checked 2026-11-10).",
      "pricing": "free",
      "pricingNotes": "Free to download and use under Apache 2.0, per the main repository's metadata. Running it yourself costs little: 5.9 GB with the experts at 4 bits (MXFP4), 9.6 GB in FP8 or 17.7 GB in BF16 (checked 2026-11-10).",
      "priceSummary": "Free",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "Weights you download and run yourself, so there is nothing to pay per call and no payment protocol (checked 2026-11-10).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-11-10"
      },
      "docsUrl": "https://huggingface.co/Zyphra/ZAYA1-8B",
      "capabilities": [
        "model.open-weights"
      ],
      "tags": [
        "open-weights",
        "model",
        "moe",
        "small",
        "reasoning",
        "maths",
        "coding",
        "tool-calling",
        "apache-2.0",
        "safetensors",
        "fp8",
        "mxfp4",
        "self-hosted"
      ],
      "lastRelease": "2026-07-02",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 61,
        "grade": "C",
        "agentReady": false,
        "rank": 0,
        "ranked": false,
        "notRankedWhy": "An open-weight model, graded by the open-weight checklist and ranked among open-weight models, not against tools",
        "rankOf": 1518,
        "categoryRank": 67,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "interface": 60,
          "reach": 80,
          "risk": 55,
          "upkeep": 50
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "low",
          "date": "2026-11-10"
        },
        "negative": 0,
        "verdict": "A small reasoning model trained from scratch by one lab, with a clean licence, 4-bit and FP8 builds and a team that answers questions. It's the hardest of the small models to run: its own architecture, a card that points at forks, and tool calling that needs a parser no release has. Little on limits, data or safety.",
        "bestFor": "People who want a small, fast reasoning model for maths and code and can live without tool calling",
        "strengths": [
          "Apache 2.0, ungated",
          "5.9 GB at 4 bits, 760M parameters active",
          "Released Transformers and SGLang carry the architecture",
          "Zyphra replied in most of the recent discussions",
          "The original checkpoint is kept beside the reshaped one"
        ],
        "weaknesses": [
          "Tool calling needs a parser that only Zyphra's vLLM fork has",
          "Released vLLM and llama.cpp don't run it, and there's no GGUF",
          "The card's install steps use forks",
          "No limitations, context length, languages, data or safety results on the card",
          "Benchmarks on the card are all from Zyphra's own harness"
        ],
        "agentNotes": [
          "Use it for reasoning, maths and code. Don't count on tool calling outside Zyphra's vLLM fork",
          "Run it with Transformers 5.22.2 or SGLang 0.5.23, which have the model built in",
          "Use temperature 1.0 and top_p 0.95 in general, and temperature 0.6 for agent and code work",
          "Download `Zyphra/ZAYA1-8B`, not the legacy repository, for the released runtimes",
          "The quantised repositories have no licence tag. The main one is Apache 2.0"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "low",
            "grade": "C",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 61
          }
        ],
        "editorialScores": {
          "interface": 60,
          "reach": 80,
          "risk": 55,
          "upkeep": 50
        },
        "provenanceScore": 56,
        "checked": {
          "categories": {
            "interface": "2026-11-10",
            "reach": "2026-11-10",
            "risk": "2026-11-10",
            "upkeep": "2026-11-10"
          },
          "last": "2026-11-10",
          "oldest": "2026-11-10",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "install": "pip install \"sglang\u003e=0.5.23\"\npython -m sglang.launch_server --model-path Zyphra/ZAYA1-8B --reasoning-parser qwen3\n# the card's own route is vLLM from Zyphra's fork, with --tool-call-parser zaya_xml",
        "http": "# SGLang serves an OpenAI-compatible API at http://localhost:30000/v1. The card recommends temperature 1.0\n# and top_p 0.95 in general, and temperature 0.6 for agent and code work"
      },
      "letme": {
        "capability": "https://letme.dev/model.open-weights",
        "tool": "https://letme.dev/zaya1-8b"
      },
      "weights": {
        "trainedBy": "Zyphra",
        "builtOn": "ZAYA1-reasoning-base, Zyphra's own pre-trained model, per the card",
        "params": "8.4B",
        "active": "760M",
        "context": 131072,
        "goodFor": "Long step-by-step reasoning in maths and code on a small machine, and as the model inside a test-time compute harness.",
        "runtimes": [
          "SGLang",
          "Transformers"
        ],
        "builds": [
          {
            "name": "ZAYA1-8B-MXFP4-Experts",
            "url": "https://huggingface.co/Zyphra/ZAYA1-8B-MXFP4-Experts",
            "who": "publisher",
            "precision": "mxfp4",
            "sizeGB": 5.85,
            "memoryGB": 8,
            "format": "safetensors",
            "note": "Zyphra's build with the experts at 4 bits. Which released runtime loads it wasn't established"
          },
          {
            "name": "ZAYA1-8B-FP8-Experts",
            "url": "https://huggingface.co/Zyphra/ZAYA1-8B-FP8-Experts",
            "who": "publisher",
            "precision": "fp8",
            "sizeGB": 9.64,
            "memoryGB": 12,
            "format": "safetensors",
            "note": "Zyphra's build with the experts in FP8"
          },
          {
            "name": "ZAYA1-8B (BF16 safetensors)",
            "url": "https://huggingface.co/Zyphra/ZAYA1-8B",
            "who": "publisher",
            "precision": "bf16",
            "sizeGB": 17.68,
            "memoryGB": 24,
            "format": "safetensors",
            "runsOn": [
              "SGLang",
              "Transformers"
            ],
            "note": "Four shards, reshaped for Transformers"
          }
        ],
        "run": "python -m sglang.launch_server --model-path Zyphra/ZAYA1-8B --reasoning-parser qwen3",
        "runBuild": "ZAYA1-8B (BF16 safetensors)",
        "checked": "2026-11-10",
        "minMemoryGB": 8
      },
      "family": {
        "lab": "Zyphra",
        "family": "ZAYA1",
        "url": "https://www.anchorterminal.com/open-weights/#zyphra",
        "others": [
          {
            "name": "ZAYA1-VL-8B",
            "url": "https://huggingface.co/Zyphra/ZAYA1-VL-8B"
          },
          {
            "name": "ZAYA1-74B-preview",
            "url": "https://huggingface.co/Zyphra/ZAYA1-74B-preview"
          }
        ]
      },
      "area": "models",
      "provenance": {
        "legalEntity": "Zyphra, named on the card and its site. The legal entity wasn't looked up",
        "domain": "zyphra.com",
        "domainRegistered": "",
        "endpointOnVendorDomain": null,
        "terms": "",
        "privacy": "",
        "statusPage": "",
        "changelog": "https://huggingface.co/Zyphra/ZAYA1-8B/commits/main",
        "securityTxt": "none",
        "checked": "2026-11-10",
        "notes": [
          "www.zyphra.com's robots.txt allows reading outside /studio and /api. Its about page gives a San Francisco address and names no people in the text read.",
          "The domain's registration date wasn't looked up. www.zyphra.com has no security.txt (404 on 10 November 2026).",
          "Nothing is hosted under this listing, so Apache 2.0 stands in for terms of service and no privacy policy is scored. Zyphra's site lists a cloud product for its open models, which wasn't read.",
          "The changelog is the commit history, 41 commits from 4 May to 26 June 2026."
        ],
        "score": 56
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/zaya1-8b.json"
    },
    "edges": [
      {
        "by": 55,
        "category": "reach",
        "leads": "zaya1-8b",
        "name": "Reach",
        "reasons": {
          "a": "Memory 15, the only build is the F32 safetensors set, 35.07 GB, and 35.07 GB × 1.2 = 42.1 GB, within 64 GB. Loaded as BF16, as the card's example does, it needs about half, but the line reads the file size. Runtimes 0, none of the six runs it in a released version. Builds 0, one set of weights and no quantised build. Terms 0, no licence for the weights. Download 10, the Hub API reports gated false on 10 November 2026, so the files download with no account and nothing to accept. Hosted 0, Hugging Face maps no inference provider to it, and nothing names an API that serves it. 15 + 0 + 0 + 0 + 10 + 0 = 25.",
          "b": "Memory 30, the smallest build from Zyphra is the MXFP4-Experts repository, 5.85 GB, and 5.85 GB × 1.2 = 7.0 GB, within 16 GB. Runtimes 10, Released Transformers 5.22.2 has the zaya model and SGLang 0.5.23 has srt/models/zaya.py. Builds 15, Quantised builds from Zyphra at two precisions, FP8 and MXFP4 for the experts, each in its own repository. Terms 15, Apache 2.0 in the card's metadata, an OSI licence with nothing added. Download 10, the Hub API reports gated false for the model and its builds on 10 November 2026, so the files download with no account and nothing to accept. Hosted 0, Hugging Face maps no inference provider to it, and the card names no API. Zyphra's site lists a cloud product for its open models, which wasn't checked for this model. 30 + 10 + 15 + 15 + 10 + 0 = 80."
        },
        "scores": {
          "a": 25,
          "b": 80
        }
      },
      {
        "by": 40,
        "category": "interface",
        "leads": "zaya1-8b",
        "name": "Agent interface",
        "reasons": {
          "a": "Chat template 20, A chat template in tokenizer_config.json (4,116 characters), which came with the Qwen3 tokenizer. Tool-calling format 0, none. Trained tool calling 0, not trained for tool calling. Structured output 0, Nothing about JSON or schema-constrained output. Reasoning control 0, no reasoning mode. Context 0, no context length is stated. 20 + 0 + 0 + 0 + 0 + 0 = 20.",
          "b": "Chat template 20, chat_template.jinja in the repository (10,700 characters). Tool-calling format 10, only the template and a fork say it. Trained tool calling 10, the template takes tools and renders calls, and the card recommends settings for agent use, but it doesn't say the model was trained for tool calling or for several calls in a turn, so the lower band. Structured output 0, Nothing on the card about JSON or schema-constrained output. Reasoning control 10, the template has an enable_thinking switch, and the card names the qwen3 reasoning parser, which returns the reasoning apart from the answer. Context 10, 131,072 positions in config.json, for an architecture Zyphra trained end to end, so the config is the model's own. 20 + 10 + 10 + 0 + 10 + 10 = 60."
        },
        "scores": {
          "a": 20,
          "b": 60
        }
      },
      {
        "by": 15,
        "category": "risk",
        "leads": "zaya1-8b",
        "name": "Risk",
        "reasons": {
          "a": "File safety 15, safetensors only, no .bin, .pt or .pth files (25). Provenance 15, the files sit in the ByteDance-Seed organisation, which the ByteDance-Seed GitHub repository for the model links to (10). Safety evaluation 0, no safety results. Agent guidance 5, General cautions in the GitHub model card: not instruction-tuned or safety-aligned, not for use as an assistant, for facts or advice, or for high-impact decisions about people. Licence risk 0, With no licence for the weights there is nothing to hold ByteDance to. Security programme 5, the GitHub repository's SECURITY.md sends reports to ByteDance's security centre and says how they're assessed (5). 15 + 15 + 0 + 5 + 0 + 5 = 40.",
          "b": "File safety 25, safetensors only, no .bin, .pt or .pth files and no Python in the repository. Provenance 15, the files sit in the Zyphra organisation, which the card ties to zyphra.com's blog post for the model (10). Safety evaluation 0, no safety results on the card. Agent guidance 0, the card has no limitations or safety section, and nothing on prompt injection, instruction priority or what the model refuses. Licence risk 15, Apache 2.0 has no use policy, threshold or change clause. Security programme 0, no way to report a flaw on the card, and www.zyphra.com has no security.txt. 25 + 15 + 0 + 0 + 15 + 0 = 55."
        },
        "scores": {
          "a": 40,
          "b": 55
        }
      },
      {
        "by": 8,
        "category": "upkeep",
        "leads": "cola2",
        "name": "Documentation and upkeep",
        "reasons": {
          "a": "Model card 8, Intended use and limitations (the out-of-scope list, and the unconverged latent model) and the architecture are on the card and the GitHub model card it links. Training data 15, the GitHub model card names the source (OLMo 2 pretraining text, retokenised) and the mix by stage with token counts, 346.03B in all. Last change 20, All six commits are from 6 November 2026, four days before this check, the last one updating a checksum in the README. Responsiveness 0, no discussions on the repository, so nobody has asked anything yet and the line reads as none answered, as settled in calibration. Version policy 5, A first release. File health 10, Config, files and card agree: F32 weights, a float32 config and a card that says to load them as bfloat16, with SHA256SUMS to check the download. 8 + 15 + 20 + 0 + 5 + 10 = 58.",
          "b": "Model card 5, Intended use and the parameter counts are on the card. Training data 0, Nothing on the card about the training data. Last change 10, the main repository last changed on 26 June 2026 (the checkpoint reshaped for Transformers), 137 days before this check, and the quantised repositories on 2 July, 131 days. Responsiveness 20, Of the 16 most recent discussions that aren't pull requests (7 May to 14 August 2026), 10 have a reply from a Zyphra member, which is most. Version policy 5, the original checkpoint is kept as ZAYA1-8B-legacy and the card says so at the top, without a date. File health 10, Config, template and card agree on the architecture after the reshape. 5 + 0 + 10 + 20 + 5 + 10 = 50."
        },
        "scores": {
          "a": 58,
          "b": 50
        }
      }
    ],
    "facts": [
      {
        "a": "Open-weight model",
        "b": "Open-weight model",
        "name": "Kind"
      },
      {
        "a": "ByteDance (Seed)",
        "b": "Zyphra",
        "name": "Vendor"
      },
      {
        "a": "no (local only)",
        "b": "no (local only)",
        "name": "Hosted endpoint"
      },
      {
        "a": "",
        "b": "",
        "name": "Transports"
      },
      {
        "a": "None",
        "b": "None",
        "name": "Auth"
      },
      {
        "a": "Free",
        "b": "Free",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "None stated for the weights (the code is Apache 2.0)",
        "b": "Apache-2.0",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "no",
        "b": "no",
        "name": "llms.txt"
      },
      {
        "a": "2026-11-06",
        "b": "2026-07-02",
        "name": "Last release"
      },
      {
        "a": "no document linked",
        "b": "no document linked",
        "name": "Terms last updated"
      },
      {
        "a": "no document linked",
        "b": "no document linked",
        "name": "Privacy policy last updated"
      }
    ],
    "faq": [
      {
        "answer": "ZAYA1-8B scores 61 (C) on agent readiness against Cola2's 33.9 (F), and leads in 3 of 4 scored categories. Cola2 leads on documentation and upkeep.",
        "question": "Which is better for AI agents, Cola2 or ZAYA1-8B?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Documentation and upkeep, 58 against 50"
        ],
        "also": null,
        "goodFor": "Researchers working on latent or diffusion language models who want a checkpoint to study",
        "slug": "cola2",
        "watchFor": "No licence stated for the weights"
      },
      {
        "aheadOn": [
          "Reach, 80 against 25",
          "Risk, 55 against 40",
          "Agent interface, 60 against 20"
        ],
        "also": null,
        "goodFor": "People who want a small, fast reasoning model for maths and code and can live without tool calling",
        "slug": "zaya1-8b",
        "watchFor": "Tool calling needs a parser that only Zyphra's vLLM fork has"
      }
    ],
    "history": null,
    "job": {
      "capability": "model.open-weights",
      "name": "Open-weight models you run yourself"
    },
    "others": [
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        "json": "https://www.anchorterminal.com/compare/agents-a1-4b-vs-zaya1-8b.json",
        "title": "Agents-A1-4B vs ZAYA1-8B",
        "url": "https://www.anchorterminal.com/compare/agents-a1-4b-vs-zaya1-8b"
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      {
        "json": "https://www.anchorterminal.com/compare/apertus-v1-5-8b-vs-cola2.json",
        "title": "Apertus v1.5 8B vs Cola2",
        "url": "https://www.anchorterminal.com/compare/apertus-v1-5-8b-vs-cola2"
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      {
        "json": "https://www.anchorterminal.com/compare/apodex-1-1-mini-vs-cola2.json",
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        "url": "https://www.anchorterminal.com/compare/apodex-1-1-mini-vs-cola2"
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        "json": "https://www.anchorterminal.com/compare/bigbang-v1-vs-zaya1-8b.json",
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        "url": "https://www.anchorterminal.com/compare/carbon-x-vs-zaya1-8b"
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        "json": "https://www.anchorterminal.com/compare/cola2-vs-exaone-4-5-33b.json",
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        "url": "https://www.anchorterminal.com/compare/cola2-vs-exaone-4-5-33b"
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        "json": "https://www.anchorterminal.com/compare/cola2-vs-gemma-4-12b-it.json",
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        "json": "https://www.anchorterminal.com/compare/cola2-vs-gemma-4-31b-it.json",
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        "json": "https://www.anchorterminal.com/compare/cola2-vs-muse-glimmer-30b.json",
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        "json": "https://www.anchorterminal.com/compare/unlimited-ocr-2-vs-zaya1-8b.json",
        "title": "Baidu Unlimited-OCR-2 vs ZAYA1-8B",
        "url": "https://www.anchorterminal.com/compare/unlimited-ocr-2-vs-zaya1-8b"
      },
      {
        "json": "https://www.anchorterminal.com/compare/wevisone-vl-2b-vs-zaya1-8b.json",
        "title": "WeVisOne-VL-2B vs ZAYA1-8B",
        "url": "https://www.anchorterminal.com/compare/wevisone-vl-2b-vs-zaya1-8b"
      },
      {
        "json": "https://www.anchorterminal.com/compare/wevisone-vl-4b-vs-zaya1-8b.json",
        "title": "WeVisOne-VL-4B vs ZAYA1-8B",
        "url": "https://www.anchorterminal.com/compare/wevisone-vl-4b-vs-zaya1-8b"
      }
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    "panel": null,
    "scores": [
      {
        "key": "capability",
        "name": "Capability",
        "pending": true,
        "weight": 35
      },
      {
        "by": 55,
        "cola2": 25,
        "edge": "zaya1-8b",
        "key": "reach",
        "name": "Reach",
        "weight": 25,
        "zaya1-8b": 80
      },
      {
        "by": 15,
        "cola2": 40,
        "edge": "zaya1-8b",
        "key": "risk",
        "name": "Risk",
        "weight": 20,
        "zaya1-8b": 55
      },
      {
        "by": 40,
        "cola2": 20,
        "edge": "zaya1-8b",
        "key": "interface",
        "name": "Agent interface",
        "weight": 10,
        "zaya1-8b": 60
      },
      {
        "by": 8,
        "cola2": 58,
        "edge": "cola2",
        "key": "upkeep",
        "name": "Documentation and upkeep",
        "weight": 10,
        "zaya1-8b": 50
      }
    ],
    "summary": "ZAYA1-8B scores 61 (C) on agent readiness against Cola2's 33.9 (F), and leads in 3 of 4 scored categories. Cola2 leads on documentation and upkeep. Both do open-weight models you run yourself.",
    "tasks": null,
    "tutorials": [],
    "verdicts": {
      "cola2": "A research release, and an honest one: ByteDance Seed says it's a base model with an unconverged latent stage, scoring below Llama-3-8B on its own table. It's here for people studying continuous-latent generation. Agents can't use it as a model: 32-token completions, no chat or tools, the repository's own code to load it, and no licence on the weights.",
      "zaya1-8b": "A small reasoning model trained from scratch by one lab, with a clean licence, 4-bit and FP8 builds and a team that answers questions. It's the hardest of the small models to run: its own architecture, a card that points at forks, and tool calling that needs a parser no release has. Little on limits, data or safety."
    }
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  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/cola2-vs-zaya1-8b",
    "json": "https://www.anchorterminal.com/compare/cola2-vs-zaya1-8b.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/cola2-vs-zaya1-8b.md",
    "mcp": "https://www.anchorterminal.com/mcp",
    "slim": "https://www.anchorterminal.com/compare/cola2-vs-zaya1-8b.min.md"
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  "markdown": "ZAYA1-8B scores 61 (C) on agent readiness against Cola2's 33.9 (F), and leads in 3 of 4 scored categories. Cola2 leads on documentation and upkeep. Both do open-weight models you run yourself.\n\n- Cola2: grade F, 33.9/100, rank #160 of 160 open-weight models. Markdown https://www.anchorterminal.com/tools/cola2.md · JSON https://www.anchorterminal.com/api/v1/tools/cola2.json\n- ZAYA1-8B: grade C, 61/100, rank #85 of 160 open-weight models. Markdown https://www.anchorterminal.com/tools/zaya1-8b.md · JSON https://www.anchorterminal.com/api/v1/tools/zaya1-8b.json\n- Best open-weight models you download and run yourself for AI agents: https://www.anchorterminal.com/best/open-weights/index.md\n- All 6359 open weights comparisons: https://www.anchorterminal.com/compare/open-weights/index.md\n\n## Which one, for what\n\n### Cola2 (F)\n\nGood for: Researchers working on latent or diffusion language models who want a checkpoint to study\n\nAhead on:\n- Documentation and upkeep, 58 against 50\n\nWatch for: No licence stated for the weights\n\n### ZAYA1-8B (C)\n\nGood for: People who want a small, fast reasoning model for maths and code and can live without tool calling\n\nAhead on:\n- Reach, 80 against 25\n- Risk, 55 against 40\n- Agent interface, 60 against 20\n\nWatch for: Tool calling needs a parser that only Zyphra's vLLM fork has\n\n\n## Why the edge\n\n### Reach: ZAYA1-8B +55\n\n- Cola2 (25): Memory 15, the only build is the F32 safetensors set, 35.07 GB, and 35.07 GB × 1.2 = 42.1 GB, within 64 GB. Loaded as BF16, as the card's example does, it needs about half, but the line reads the file size. Runtimes 0, none of the six runs it in a released version. Builds 0, one set of weights and no quantised build. Terms 0, no licence for the weights. Download 10, the Hub API reports gated false on 10 November 2026, so the files download with no account and nothing to accept. Hosted 0, Hugging Face maps no inference provider to it, and nothing names an API that serves it. 15 + 0 + 0 + 0 + 10 + 0 = 25.\n- ZAYA1-8B (80): Memory 30, the smallest build from Zyphra is the MXFP4-Experts repository, 5.85 GB, and 5.85 GB × 1.2 = 7.0 GB, within 16 GB. Runtimes 10, Released Transformers 5.22.2 has the zaya model and SGLang 0.5.23 has srt/models/zaya.py. Builds 15, Quantised builds from Zyphra at two precisions, FP8 and MXFP4 for the experts, each in its own repository. Terms 15, Apache 2.0 in the card's metadata, an OSI licence with nothing added. Download 10, the Hub API reports gated false for the model and its builds on 10 November 2026, so the files download with no account and nothing to accept. Hosted 0, Hugging Face maps no inference provider to it, and the card names no API. Zyphra's site lists a cloud product for its open models, which wasn't checked for this model. 30 + 10 + 15 + 15 + 10 + 0 = 80.\n\n### Agent interface: ZAYA1-8B +40\n\n- Cola2 (20): Chat template 20, A chat template in tokenizer_config.json (4,116 characters), which came with the Qwen3 tokenizer. Tool-calling format 0, none. Trained tool calling 0, not trained for tool calling. Structured output 0, Nothing about JSON or schema-constrained output. Reasoning control 0, no reasoning mode. Context 0, no context length is stated. 20 + 0 + 0 + 0 + 0 + 0 = 20.\n- ZAYA1-8B (60): Chat template 20, chat_template.jinja in the repository (10,700 characters). Tool-calling format 10, only the template and a fork say it. Trained tool calling 10, the template takes tools and renders calls, and the card recommends settings for agent use, but it doesn't say the model was trained for tool calling or for several calls in a turn, so the lower band. Structured output 0, Nothing on the card about JSON or schema-constrained output. Reasoning control 10, the template has an enable_thinking switch, and the card names the qwen3 reasoning parser, which returns the reasoning apart from the answer. Context 10, 131,072 positions in config.json, for an architecture Zyphra trained end to end, so the config is the model's own. 20 + 10 + 10 + 0 + 10 + 10 = 60.\n\n### Risk: ZAYA1-8B +15\n\n- Cola2 (40): File safety 15, safetensors only, no .bin, .pt or .pth files (25). Provenance 15, the files sit in the ByteDance-Seed organisation, which the ByteDance-Seed GitHub repository for the model links to (10). Safety evaluation 0, no safety results. Agent guidance 5, General cautions in the GitHub model card: not instruction-tuned or safety-aligned, not for use as an assistant, for facts or advice, or for high-impact decisions about people. Licence risk 0, With no licence for the weights there is nothing to hold ByteDance to. Security programme 5, the GitHub repository's SECURITY.md sends reports to ByteDance's security centre and says how they're assessed (5). 15 + 15 + 0 + 5 + 0 + 5 = 40.\n- ZAYA1-8B (55): File safety 25, safetensors only, no .bin, .pt or .pth files and no Python in the repository. Provenance 15, the files sit in the Zyphra organisation, which the card ties to zyphra.com's blog post for the model (10). Safety evaluation 0, no safety results on the card. Agent guidance 0, the card has no limitations or safety section, and nothing on prompt injection, instruction priority or what the model refuses. Licence risk 15, Apache 2.0 has no use policy, threshold or change clause. Security programme 0, no way to report a flaw on the card, and www.zyphra.com has no security.txt. 25 + 15 + 0 + 0 + 15 + 0 = 55.\n\n### Documentation and upkeep: Cola2 +8\n\n- Cola2 (58): Model card 8, Intended use and limitations (the out-of-scope list, and the unconverged latent model) and the architecture are on the card and the GitHub model card it links. Training data 15, the GitHub model card names the source (OLMo 2 pretraining text, retokenised) and the mix by stage with token counts, 346.03B in all. Last change 20, All six commits are from 6 November 2026, four days before this check, the last one updating a checksum in the README. Responsiveness 0, no discussions on the repository, so nobody has asked anything yet and the line reads as none answered, as settled in calibration. Version policy 5, A first release. File health 10, Config, files and card agree: F32 weights, a float32 config and a card that says to load them as bfloat16, with SHA256SUMS to check the download. 8 + 15 + 20 + 0 + 5 + 10 = 58.\n- ZAYA1-8B (50): Model card 5, Intended use and the parameter counts are on the card. Training data 0, Nothing on the card about the training data. Last change 10, the main repository last changed on 26 June 2026 (the checkpoint reshaped for Transformers), 137 days before this check, and the quantised repositories on 2 July, 131 days. Responsiveness 20, Of the 16 most recent discussions that aren't pull requests (7 May to 14 August 2026), 10 have a reply from a Zyphra member, which is most. Version policy 5, the original checkpoint is kept as ZAYA1-8B-legacy and the card says so at the top, without a date. File health 10, Config, template and card agree on the architecture after the reshape. 5 + 0 + 10 + 20 + 5 + 10 = 50.\n\n## Score by category\n\n| Category | Weight | Cola2 | ZAYA1-8B | Edge |\n| --- | --- | --- | --- | --- |\n| Capability | 35%, pending | pending | pending | not scored in this run |\n| Reach | 25% (25 this run) | 25 | 80 | ZAYA1-8B +55 |\n| Risk | 20% (20 this run) | 40 | 55 | ZAYA1-8B +15 |\n| Agent interface | 10% (10 this run) | 20 | 60 | ZAYA1-8B +40 |\n| Documentation and upkeep | 10% (10 this run) | 58 | 50 | Cola2 +8 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **33.9 · F** | **61 · C** | |\n\n## Facts side by side\n\n| Fact | Cola2 | ZAYA1-8B |\n| --- | --- | --- |\n| Kind | Open-weight model | Open-weight model |\n| Vendor | ByteDance (Seed) | Zyphra |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports |  |  |\n| Auth | None | None |\n| Pricing | Free | Free |\n| x402 | no | no |\n| Licence | None stated for the weights (the code is Apache 2.0) | Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | no | no |\n| Last release | 2026-11-06 | 2026-07-02 |\n| Terms last updated | no document linked | no document linked |\n| Privacy policy last updated | no document linked | no document linked |\n\n## Verdicts\n\n**Cola2.** A research release, and an honest one: ByteDance Seed says it's a base model with an unconverged latent stage, scoring below Llama-3-8B on its own table. It's here for people studying continuous-latent generation. Agents can't use it as a model: 32-token completions, no chat or tools, the repository's own code to load it, and no licence on the weights.\n\n**ZAYA1-8B.** A small reasoning model trained from scratch by one lab, with a clean licence, 4-bit and FP8 builds and a team that answers questions. It's the hardest of the small models to run: its own architecture, a card that points at forks, and tool calling that needs a parser no release has. Little on limits, data or safety.\n\n## Before you call either\n\n### Cola2\n\n1. Don't plan to use this as your model. It completes short prompts and wasn't tuned to follow instructions\n2. Don't use it commercially on the strength of this listing. The weights have no stated licence\n3. If you study it, read modeling_cola2.py first: trust_remote_code runs it\n4. Pin Transformers below 5, as the card requires\n5. Pass a seeded torch.Generator to generate(). Output varies between runs even with greedy decoding\n6. Check the download with `sha256sum -c SHA256SUMS`\n\n### ZAYA1-8B\n\n1. Use it for reasoning, maths and code. Don't count on tool calling outside Zyphra's vLLM fork\n2. Run it with Transformers 5.22.2 or SGLang 0.5.23, which have the model built in\n3. Use temperature 1.0 and top_p 0.95 in general, and temperature 0.6 for agent and code work\n4. Download `Zyphra/ZAYA1-8B`, not the legacy repository, for the released runtimes\n5. The quantised repositories have no licence tag. The main one is Apache 2.0\n\n## Questions\n\n### Which is better for AI agents, Cola2 or ZAYA1-8B?\n\nZAYA1-8B scores 61 (C) on agent readiness against Cola2's 33.9 (F), and leads in 3 of 4 scored categories. Cola2 leads on documentation and upkeep.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/cola2-vs-zaya1-8b.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cola2-vs-zaya1-8b.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"cola2\", \"b\": \"zaya1-8b\"}`. 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