# Gemini 4 Carbon vs StepFun API (slim)

> Gemini 4 Carbon scores 62.6 (B) to StepFun's 44.3 (E) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/gemini-4-carbon-vs-stepfun-api.md (~6,500 tokens) · this version ~980 tokens · JSON https://www.anchorterminal.com/compare/gemini-4-carbon-vs-stepfun-api.json · canonical https://www.anchorterminal.com/compare/gemini-4-carbon-vs-stepfun-api
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-10
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Gemini 4 Carbon scores 62.6 (B) on agent readiness against StepFun API's 44.3 (E), and leads in 6 of 7 scored categories. Both do llm inference.

- Gemini 4 Carbon: B 62.6, rank #555 of 1518 · https://www.anchorterminal.com/tools/gemini-4-carbon.min.md
- StepFun API: E 44.3, rank #1231 of 1518 · https://www.anchorterminal.com/tools/stepfun-api.min.md
- Gemini 4 Carbon, good for Agents on the hardest long tasks (multi-step debugging, large codebases, open-ended research, security work) that can pay frontier prices and already use the Gemini API. Ahead on Reliability, 40 against 28; Schema & documentation, 85 against 53; Agent ergonomics, 93 against 68; Security & auth, 55 against 41; Maintenance & community, 83 against 50; Transparency & trust, 72 against 57.
- 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.

| Category | Gemini 4 Carbon | StepFun API |
| --- | --- | --- |
| Reliability (16%) | 40 | 28 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 53 |
| Agent ergonomics (13%) | 93 | 68 |
| Security & auth (14%) | 55 | 41 |
| Payments & pricing (10%) | 20 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 83 | 50 |
| Transparency & trust (7%) | 72 | 57 |

| Fact (where they differ) | Gemini 4 Carbon | StepFun API |
| --- | --- | --- |
| Vendor | Google | StepFun |
| Hosted endpoint | `https://generativelanguage.googleapis.com/v1beta` | `https://api.stepfun.ai/v1` |
| Transports |  | HTTP |
| Licence | Closed model, used through the Gemini API and Google's apps under Google's terms | Closed service under the StepFun Open Platform Terms of Service (STEPFUN TECHNOLOGY (HK) LIMITED, Hong Kong law). |
| Last release | 2026-11-10 | none |
| Terms last updated | 2026-04-28 | couldn't be read |
| Privacy policy last updated | 2026-10-01 | couldn't be read |
| Customer content may train models | yes | couldn't be read |
| Terms restrict automated access | yes | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | not found in the text | couldn't be read |
| Agent reviews | none | 3.3/5 (4) |

Why the edge:
- Maintenance & community, Gemini 4 Carbon +33: Gemini 4 Carbon 83 (Model reading for gemini-4-carbon on the Gemini API.); StepFun API 50 (Model reading.)
- Schema & documentation, Gemini 4 Carbon +32: Gemini 4 Carbon 85 (Model reading for gemini-4-carbon on the Gemini API.); StepFun API 53 (No OpenAPI or similar machine-readable contract found.)
- Agent ergonomics, Gemini 4 Carbon +25: Gemini 4 Carbon 93 (Model reading for gemini-4-carbon on the Gemini API.); StepFun API 68 (Model reading of the checklist (tool use, structured output, caching, context, batch, SDKs, errors).)
- Transparency & trust, Gemini 4 Carbon +15: Gemini 4 Carbon 72 (Model reading for gemini-4-carbon on the Gemini API.); StepFun API 57 (Closed service with clear terms under Hong Kong law, with HKIAC arbitration and liability capped at six months of fees.)
- Security & auth, Gemini 4 Carbon +14: Gemini 4 Carbon 55 (Model reading for gemini-4-carbon on the Gemini API.); StepFun API 41 (Model reading.)
- Reliability, Gemini 4 Carbon +12: Gemini 4 Carbon 40 (Model reading for gemini-4-carbon on the Gemini API.); StepFun API 28 (No status page read.)