# Antseed vs Prism Inference

> Prism Inference scores 60.1 (C) on agent readiness against Antseed's 55.1 (C), and leads in 5 of 7 scored categories. Antseed leads on payments & pricing and maintenance & community. Both do llm inference. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/antseed-vs-prism-inference
- Markdown: https://www.anchorterminal.com/compare/antseed-vs-prism-inference.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/antseed-vs-prism-inference.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/antseed-vs-prism-inference.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Prism Inference scores 60.1 (C) on agent readiness against Antseed's 55.1 (C), and leads in 5 of 7 scored categories. Antseed leads on payments & pricing and maintenance & community. Both do llm inference.

- Antseed: grade C, 55.1/100, rank #518 of 722. Markdown https://www.anchorterminal.com/tools/antseed.md · JSON https://www.anchorterminal.com/api/v1/tools/antseed.json
- Prism Inference: grade C, 60.1/100, rank #412 of 722. Markdown https://www.anchorterminal.com/tools/prism-inference.md · JSON https://www.anchorterminal.com/api/v1/tools/prism-inference.json

## Which one, for what

### Antseed (C)

Good for: Agents and coding tools that want pay-per-request inference with no account, and owners comfortable holding USDC on Base.

Ahead on:
- Payments & pricing, 70 against 30
- Maintenance & community, 79 against 49

Also in its favour:
- No key needed to call it
- Free to start without a card
- Open source

Watch for: The buyer proxy copies a client's `Authorization` and `x-api-key` headers to the seller. The repository's March 2026 review flagged it and issue #1104 is open

### Prism Inference (C)

Good for: Coding agents that want DeepSeek-V4.1-Flash at a low input price, with no retention, through whichever of the three wire formats the harness already speaks.

Ahead on:
- Schema & documentation, 82 against 55
- Agent ergonomics, 68 against 56
- Security & auth, 65 against 45

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: Two models. The docs mark Gemma 4 31B as request access per organisation, while llms.txt and the keyless catalogue list it as available


## Score by category

| Category | Weight | Antseed | Prism Inference | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 62 | 65 | Prism Inference +3 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 55 | 82 | Prism Inference +27 |
| Agent ergonomics | 13% (16.2 this run) | 56 | 68 | Prism Inference +12 |
| Security & auth | 14% (17.5 this run) | 45 | 65 | Prism Inference +20 |
| Payments & pricing | 10% (12.5 this run) | 70 | 30 | Antseed +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 79 | 49 | Antseed +30 |
| Transparency & trust | 7% (8.8 this run) | 59 | 61 | Prism Inference +2 |
| Negative events | ≤15 | -4 | -2 | |
| **Total** | | **55.1 · C** | **60.1 · C** | |

## Facts side by side

| Fact | Antseed | Prism Inference |
| --- | --- | --- |
| Kind | Model router | Model API |
| Vendor | Antseed Foundation | Prism Technologies Inc |
| Hosted endpoint | no (local only) | `https://api.prisminference.com/v1` |
| Transports | HTTP | HTTP |
| Auth | None | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | GPL-3.0 (LICENSE in the repository). The @antseed/cli manifest on npm carries no licence field | Proprietary service under Prism's terms of service. The OpenAPI file declares `LicenseRef-Proprietary`. The Hermes provider plugin repository carries no licence file |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-08 | 2026-10-06 |
| Terms last updated | 2026-05-15 | 2026-09-09 |
| Privacy policy last updated | no document linked | 2026-09-09 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 106 stars, 1.8k npm/wk | none |

## Verdicts

**Antseed.** A buyer needs no account. The CLI creates a wallet key, free models answer at once and paid ones draw on deposited USDC, with seller, tokens and cost returned in response headers. Sellers are unvetted and can read prompts unless TEE-verified, the proxy forwards a client's own credential headers to them, and every package is pre-1.0.

**Prism Inference.** Three wire formats, a public OpenAPI 3.1 file, per-token prices in a keyless catalogue and zero data retention by default on every tier. The service launched on 24 September 2026 with two models, one of them by request, from a two-person company. No rate-limit numbers, SLA document, free tier or deprecation policy was found.

## Before you call either

### Antseed

1. Send a placeholder key such as `antseed-p2p`. The proxy forwards whatever `Authorization` or `x-api-key` header the client sends to the seller
2. Call `GET /v1/models` first and request a concrete id. The `antseed` alias works only when the desktop app has a model selected
3. Handle 402 `insufficient_deposits` by reading `suggestedAmount`, then fund the address from `antseed buyer deposit` with USDC on Base
4. Pass `--verifiers antseed-verifier --require-verifier` to `antseed buyer start` when prompts are private, so only TEE-verified sellers are routed
5. Read `x-antseed-peer-id` and `x-antseed-estimated-cost-usd` on each response, and pin a seller with `<peerId>@<model>` when the same one must answer

### Prism Inference

1. Call `GET https://api.prisminference.com/v1/models` at start-up, with no key, and use only ids it returns. Expect 403 on `gemma-4-31b` without organisation access
2. Use base URL `https://api.prisminference.com/v1` for OpenAI clients and `https://api.prisminference.com` with no `/v1` for Anthropic clients
3. Read `error.retryable` before retrying, and wait for `Retry-After` on 429, which covers both key limits and model capacity
4. Send `reasoning_effort: "none"` or `low` when latency matters. Reasoning is on by default and its tokens are billed as output
5. Keep conversation state yourself and send `store: false` on Responses. `previous_response_id`, stored responses and hosted tools aren't supported

## Questions

### Which is better for AI agents, Antseed or Prism Inference?

Prism Inference scores 60.1 (C) on agent readiness against Antseed's 55.1 (C), and leads in 5 of 7 scored categories. Antseed leads on payments & pricing and maintenance & community.

### Do Antseed and Prism Inference need an API key?

Antseed needs no key. Prism Inference needs an API key.

### Can an agent call Antseed and Prism Inference without installing anything?

No hosted endpoint is listed for Antseed. Prism Inference has a hosted endpoint at https://api.prisminference.com/v1.

### Are Antseed and Prism Inference open source?

Antseed is open source (GPL-3.0 (LICENSE in the repository). The @antseed/cli manifest on npm carries no licence field). No open-source release is listed for Prism Inference.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/antseed-vs-prism-inference.json, and with the fewest tokens: https://www.anchorterminal.com/compare/antseed-vs-prism-inference.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "antseed", "b": "prism-inference"}`. From a terminal: `anchor compare antseed prism-inference`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/antseed.json and https://www.anchorterminal.com/api/v1/tools/prism-inference.json

## Other comparisons with Antseed or Prism Inference

- [Claude API vs Antseed](https://www.anchorterminal.com/compare/anthropic-api-vs-antseed.md)
- [Claude API vs Prism Inference](https://www.anchorterminal.com/compare/anthropic-api-vs-prism-inference.md)
- [Antseed vs BlockRun.AI](https://www.anchorterminal.com/compare/antseed-vs-blockrun-ai.md)
- [Antseed vs DeepSeek API](https://www.anchorterminal.com/compare/antseed-vs-deepseek-api.md)
- [Antseed vs Gemini Developer API](https://www.anchorterminal.com/compare/antseed-vs-gemini-api.md)
- [Antseed vs GroqCloud](https://www.anchorterminal.com/compare/antseed-vs-groq.md)
- [Antseed vs Mistral AI API](https://www.anchorterminal.com/compare/antseed-vs-mistral-api.md)
- [Antseed vs OpenAI API](https://www.anchorterminal.com/compare/antseed-vs-openai-api.md)
- [BlockRun.AI vs Prism Inference](https://www.anchorterminal.com/compare/blockrun-ai-vs-prism-inference.md)
- [DeepSeek API vs Prism Inference](https://www.anchorterminal.com/compare/deepseek-api-vs-prism-inference.md)
- [Gemini Developer API vs Prism Inference](https://www.anchorterminal.com/compare/gemini-api-vs-prism-inference.md)
- [GroqCloud vs Prism Inference](https://www.anchorterminal.com/compare/groq-vs-prism-inference.md)
- [Mistral AI API vs Prism Inference](https://www.anchorterminal.com/compare/mistral-api-vs-prism-inference.md)
- [OpenAI API vs Prism Inference](https://www.anchorterminal.com/compare/openai-api-vs-prism-inference.md)
- [OpenRouter vs Prism Inference](https://www.anchorterminal.com/compare/openrouter-vs-prism-inference.md)
- [Antseed vs OpenRouter](https://www.anchorterminal.com/compare/antseed-vs-openrouter.md)