# Claude Fable 5.2 vs Muse Ember (slim)

> Claude Fable 5.2 scores 77.3 (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/claude-fable-5-2-vs-muse-ember.md (~6,400 tokens) · this version ~930 tokens · JSON https://www.anchorterminal.com/compare/claude-fable-5-2-vs-muse-ember.json · canonical https://www.anchorterminal.com/compare/claude-fable-5-2-vs-muse-ember
- 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)

Claude Fable 5.2 scores 77.3 (BB) on agent readiness against Muse Ember's 51.8 (D), and leads in every scored category. Both do llm inference.

- Claude Fable 5.2: BB 77.3, rank #35 of 1517 · https://www.anchorterminal.com/tools/claude-fable-5-2.min.md
- Muse Ember: D 51.8, rank #1019 of 1517 · https://www.anchorterminal.com/tools/muse-ember.min.md
- Claude Fable 5.2, good for Agents doing long, hard work (large coding changes, multi-step research, computer use) that can pay frontier prices, accept 30-day retention and don't need to force a tool call. Ahead on Reliability, 60 against 40; Schema & documentation, 90 against 60; Agent ergonomics, 95 against 72; Security & auth, 92 against 64; Payments & pricing, 30 against 20; Maintenance & community, 91 against 46; Transparency & trust, 85 against 53. Also Agent-ready, a grade of BB or better.
- 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.

| Category | Claude Fable 5.2 | Muse Ember |
| --- | --- | --- |
| Reliability (16%) | 60 | 40 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 60 |
| Agent ergonomics (13%) | 95 | 72 |
| Security & auth (14%) | 92 | 64 |
| Payments & pricing (10%) | 30 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 91 | 46 |
| Transparency & trust (7%) | 85 | 53 |

| Fact (where they differ) | Claude Fable 5.2 | Muse Ember |
| --- | --- | --- |
| Vendor | Anthropic | Meta |
| Hosted endpoint | `https://api.anthropic.com/v1` | `https://api.meta.ai/v1` |
| Licence | Closed model, used through the Claude API and cloud platforms under Anthropic's Commercial Terms of Service | 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 |
| Terms last updated | no date given | 2026-10-02 |
| Privacy policy last updated | no date given | couldn't be read |
| Customer content may train models | yes, with an opt-out | yes |

Why the edge:
- Maintenance & community, Claude Fable 5.2 +45: Claude Fable 5.2 91 (Model reading for claude-fable-5-2 on the Claude API.); Muse Ember 46 (Model reading.)
- Transparency & trust, Claude Fable 5.2 +32: Claude Fable 5.2 85 (Model reading for claude-fable-5-2 on the Claude API.); Muse Ember 53 (Editorial half.)
- Schema & documentation, Claude Fable 5.2 +30: Claude Fable 5.2 90 (Model reading for claude-fable-5-2 on the Claude API.); Muse Ember 60 (Model reading.)
- Security & auth, Claude Fable 5.2 +28: Claude Fable 5.2 92 (Model reading for claude-fable-5-2 on the Claude API.); Muse Ember 64 (Platform readings are the meta-model-api listing's of 4 November.)
- Agent ergonomics, Claude Fable 5.2 +23: Claude Fable 5.2 95 (Model reading for claude-fable-5-2 on the Claude API.); Muse Ember 72 (Model reading.)
- Reliability, Claude Fable 5.2 +20: Claude Fable 5.2 60 (Model reading for claude-fable-5-2 on the Claude API.); Muse Ember 40 (Model reading, for the surface it's called on, Meta Model API.)