# Muse Ember vs StepFun API (slim)

> Muse Ember scores 51.8 (D) 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/muse-ember-vs-stepfun-api.md (~5,100 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/muse-ember-vs-stepfun-api.json · canonical https://www.anchorterminal.com/compare/muse-ember-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: 2026-11-09
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Muse Ember scores 51.8 (D) on agent readiness against StepFun API's 44.3 (E), and leads in 4 of 7 scored categories. Both do llm inference.

- Muse Ember: D 51.8, rank #1017 of 1515 · https://www.anchorterminal.com/tools/muse-ember.min.md
- StepFun API: E 44.3, rank #1228 of 1515 · https://www.anchorterminal.com/tools/stepfun-api.min.md
- Muse Ember, good for Agents that hand out many small, bounded tasks (sub-agents, tool loops, routing, extraction over thousands of files) and want a cheap multimodal model with a 1M context behind the same API as a bigger Muse model. Ahead on Reliability, 40 against 28; Schema & documentation, 60 against 53; Security & auth, 64 against 41.
- 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 | Muse Ember | StepFun API |
| --- | --- | --- |
| Reliability (16%) | 40 | 28 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 60 | 53 |
| Agent ergonomics (13%) | 72 | 68 |
| Security & auth (14%) | 64 | 41 |
| Payments & pricing (10%) | 20 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 46 | 50 |
| Transparency & trust (7%) | 53 | 57 |

| Fact (where they differ) | Muse Ember | StepFun API |
| --- | --- | --- |
| Vendor | Meta | StepFun |
| Hosted endpoint | `https://api.meta.ai/v1` | `https://api.stepfun.ai/v1` |
| Transports |  | HTTP |
| Licence | Closed model, used through Meta Model API and Muse Code under the Meta Model API Terms of Service (last updated 9 October 2026). No open weights; Meta's open-weight models are Muse Spark Open and Muse Glimmer | Closed service under the StepFun Open Platform Terms of Service (STEPFUN TECHNOLOGY (HK) LIMITED, Hong Kong law). |
| Last release | 2026-11-09 | none |
| Terms last updated | 2026-10-02 | couldn't be read |
| Customer content may train models | yes | couldn't be read |
| Terms restrict automated access | not found in the text | 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 | yes | couldn't be read |
| Agent reviews | none | 3.3/5 (4) |

Why the edge:
- Security & auth, Muse Ember +23: Muse Ember 64 (Platform readings are the meta-model-api listing's of 4 November.); StepFun API 41 (Model reading.)
- Reliability, Muse Ember +12: Muse Ember 40 (Model reading, for the surface it's called on, Meta Model API.); StepFun API 28 (No status page read.)
- Schema & documentation, Muse Ember +7: Muse Ember 60 (Model reading.); StepFun API 53 (No OpenAPI or similar machine-readable contract found.)