$ diff claude-fable-5-1 muse-glimmer
Claude Fable 5.1 vs Muse Glimmer
Values come from Claude Fable 5.1 and Muse Glimmer, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
AnthropicClaude Fable 5.1
- context
- 1M
- weights
- closed
- $/M in
- $10
- $/M out
- $50
- context
- 131K
- weights
- open
- $/M in
- —
- $/M out
- —
What actually differs
- Context window
- Claude Fable 5.1 takes 1M against 131K — 7.6× more room in a single request.
- Weights
- Muse Glimmer publishes weights (Apache 2.0); Claude Fable 5.1 is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- Claude Fable 5.1 shipped 22 days after Muse Glimmer (2026-09-01 vs 2026-08-10).
Full spec
| Attribute | Claude Fable 5.1 | Muse Glimmer |
|---|---|---|
| Developer | Anthropic | Meta AI |
| Released | 2026-09-01 | 2026-08-10 |
| Context window | 1M tokens | 131,072 |
| Pricing | $10/M input · $50/M output · cache reads $0.25/M | not recorded |
| License | proprietary (API-only; no weight release) | Apache 2.0 |
| Availability | Claude API as `claude-fable-5-1`; plan-tier access is disputed — see `## Conflicting Reports` | Hugging Face (open weights), Ollama, LM Studio, vLLM, SGLang, Together AI, Fireworks AI, OpenRouter |