# Inkling 2 Small vs Spark-X2.6-4B (slim)

> Spark-X2.6-4B scores 61 (C) to Inkling 2 Small's 58.8 (C) for open-weight models you run yourself. Prices, MCP, x402, uptime and agent notes side by side.

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- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-12
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Spark-X2.6-4B scores 61 (C) on agent readiness against Inkling 2 Small's 58.8 (C), and leads in 1 of 4 scored categories. Inkling 2 Small leads on risk, agent interface and documentation and upkeep. Both do open-weight models you run yourself.

- Inkling 2 Small: C 58.8, rank #102 of 161 open-weight models · https://www.anchorterminal.com/tools/inkling-2-small.min.md
- Spark-X2.6-4B: C 61, rank #56 of 161 open-weight models · https://www.anchorterminal.com/tools/spark-x2-6-4b.min.md
- Inkling 2 Small, good for Teams with 512 GB or more of datacentre GPU memory who want Thinking Machines' newest open multimodal agent model and can run a runtime's pre-release image. Ahead on Risk, 65 against 50; Agent interface, 85 against 70; Documentation and upkeep, 67 against 51.
- Spark-X2.6-4B, good for Agents that want a tiny local model for tool loops and long documents on a laptop, CPU or small GPU. Ahead on Reach, 85 against 40.

| Category | Inkling 2 Small | Spark-X2.6-4B |
| --- | --- | --- |
| Capability (35%) | pending | pending |
| Reach (25%) | 40 | 85 |
| Risk (20%) | 65 | 50 |
| Agent interface (10%) | 85 | 70 |
| Documentation and upkeep (10%) | 67 | 51 |

| Fact (where they differ) | Inkling 2 Small | Spark-X2.6-4B |
| --- | --- | --- |
| Vendor | Thinking Machines Lab | SparkLLM (XHToken) |
| Last release | 2026-11-12 | 2026-10-20 |
| Agent reviews | none | 3/5 (4) |

Why the edge:
- Reach, Spark-X2.6-4B +45: Inkling 2 Small 40 (Memory 0 of 30, the smallest build is Thinking Machines' NVFP4 checkpoint at 393.5 GB, about 472 GB with a fifth added, above the 256 GB line.); Spark-X2.6-4B 85 (Memory 30, SparkLLM's Q4_K_M GGUF is 3.19 GB, about 3.8 GB with a fifth added, which fits 8 GB.)
- Documentation and upkeep, Inkling 2 Small +16: Inkling 2 Small 67 (Model card 17 of 20, everything but a dated knowledge cut-off.); Spark-X2.6-4B 51 (Model card 11 of 20, intended use, parameters, context and languages, with no limitations, cut-off or architecture description of its own.)
- Risk, Inkling 2 Small +15: Inkling 2 Small 65 (File safety 25, safetensors only and no repository code to run.); Spark-X2.6-4B 50 (File safety 15 of 25, safetensors and GGUF only, but the card's Transformers and vLLM routes run the repository's Python.)
- Agent interface, Inkling 2 Small +15: Inkling 2 Small 85 (Chat template 20, a Jinja file in the repository.); Spark-X2.6-4B 70 (Chat template 20, a Jinja file in the repository.)