# Antseed vs StepFun API (slim)

> Antseed scores 55.1 (C) to StepFun's 44.4 (E) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/antseed-vs-stepfun-api.md (~2,750 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/antseed-vs-stepfun-api.json · canonical https://www.anchorterminal.com/compare/antseed-vs-stepfun-api
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-12

Antseed scores 55.1 (C) on agent readiness against StepFun API's 44.4 (E), and leads in 6 of 7 scored categories. StepFun API leads on agent ergonomics. Both do llm inference.

- Antseed: C 55.1, rank #675 of 965 · https://www.anchorterminal.com/tools/antseed.min.md
- StepFun API: E 44.4, rank #889 of 965 · https://www.anchorterminal.com/tools/stepfun-api.min.md
- Antseed, good for Agents and coding tools that want pay-per-request inference with no account, and owners comfortable holding USDC on Base. Ahead on Reliability, 62 against 28; Payments & pricing, 70 against 20; Maintenance & community, 79 against 50. Also No key needed to call it; Free to start without a card; Open source.
- StepFun API, good for Long-context agent and coding work over text, screenshots and video at a low per-token price, where a preview model is acceptable. Ahead on Agent ergonomics, 68 against 56. Also A hosted endpoint, with nothing to install; No incidents deducted, where Antseed loses 4 points for them.

| Category | Antseed | StepFun API |
| --- | --- | --- |
| Reliability (16%) | 62 | 28 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 55 | 53 |
| Agent ergonomics (13%) | 56 | 68 |
| Security & auth (14%) | 45 | 41 |
| Payments & pricing (10%) | 70 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 79 | 50 |
| Transparency & trust (7%) | 59 | 58 |

| Fact (where they differ) | Antseed | StepFun API |
| --- | --- | --- |
| Kind | Model router | Model API |
| Vendor | Antseed Foundation | StepFun |
| Hosted endpoint | no (local only) | `https://api.stepfun.ai/v1` |
| Auth | None | API key |
| Licence | GPL-3.0 (LICENSE in the repository). The @antseed/cli manifest on npm carries no licence field | Closed service under the StepFun Open Platform Terms of Service (STEPFUN TECHNOLOGY (HK) LIMITED, Hong Kong law). |
| Last release | 2026-10-08 | none |
| Terms last updated | 2026-05-15 |  |
| Privacy policy last updated | no document linked |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 106 stars, 1.8k npm/wk | none |