# Muse Ember vs xAI API (Grok) (slim)

> xAI scores 71.7 (BB) to Muse Ember's 51.8 (D) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/muse-ember-vs-xai-api.md (~6,450 tokens) · this version ~980 tokens · JSON https://www.anchorterminal.com/compare/muse-ember-vs-xai-api.json · canonical https://www.anchorterminal.com/compare/muse-ember-vs-xai-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)

xAI API (Grok) scores 71.7 (BB) on agent readiness against Muse Ember's 51.8 (D), and leads in 6 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
- xAI API (Grok): BB 71.7, rank #152 of 1515 · https://www.anchorterminal.com/tools/xai-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.
- xAI API (Grok), good for Agents that want a capable model at a low per-token price with built-in web and X search, remote MCP and voice, and teams that need self-serve ZDR or US-only processing. Ahead on Reliability, 55 against 40; Schema & documentation, 88 against 60; Agent ergonomics, 90 against 72; Security & auth, 97 against 64; Maintenance & community, 77 against 46; Transparency & trust, 63 against 53. Also Agent-ready, a grade of BB or better.

| Category | Muse Ember | xAI API (Grok) |
| --- | --- | --- |
| Reliability (16%) | 40 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 60 | 88 |
| Agent ergonomics (13%) | 72 | 90 |
| Security & auth (14%) | 64 | 97 |
| Payments & pricing (10%) | 20 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 46 | 77 |
| Transparency & trust (7%) | 53 | 63 |

| Fact (where they differ) | Muse Ember | xAI API (Grok) |
| --- | --- | --- |
| Vendor | Meta | SpaceXSI (xAI) |
| Hosted endpoint | `https://api.meta.ai/v1` | `https://api.x.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 | Proprietary service under xAI's enterprise terms of service. The Python SDK is Apache-2.0 |
| Last release | 2026-11-09 | 2026-11-02 |
| Terms last updated | 2026-10-02 | 2026-10-27 |
| Privacy policy last updated | couldn't be read | 2026-10-27 |
| Terms restrict benchmarking | yes | not found in the text |
| Popularity | none | 597 stars, 912k PyPI/wk |

Why the edge:
- Security & auth, xAI API (Grok) +33: Muse Ember 64 (Platform readings are the meta-model-api listing's of 4 November.); xAI API (Grok) 97 (Model reading.)
- Maintenance & community, xAI API (Grok) +31: Muse Ember 46 (Model reading.); xAI API (Grok) 77 (Model reading.)
- Schema & documentation, xAI API (Grok) +28: Muse Ember 60 (Model reading.); xAI API (Grok) 88 (OpenAPI 3.1 document at docs.x.ai/openapi.json, 39 paths and 205 schemas on 6 November, covering Responses, Chat Completions, files, images, videos and models.)
- Agent ergonomics, xAI API (Grok) +18: Muse Ember 72 (Model reading.); xAI API (Grok) 90 (Model reading of the checklist (tool use, structured output, caching, context, batch, SDKs, errors).)
- Reliability, xAI API (Grok) +15: Muse Ember 40 (Model reading, for the surface it's called on, Meta Model API.); xAI API (Grok) 55 (Status page at status.x.ai with components for the global and US API endpoints, voice, the consumer apps and, since the Cursor merger, Cursor's services, with a…)
- Transparency & trust, xAI API (Grok) +10: Muse Ember 53 (Editorial half.); xAI API (Grok) 63 (Closed service under xAI's enterprise terms, with the Python SDK under Apache-2.0 (15).)