Claude Fable 5.1 vs Muse Wonder.
Verdict by category, tale of the tape, shared benchmarks only, and cost at three workloads — all from the tracked data.
Verdict by category
| Category | Claude Fable 5.1 | Muse Wonder | Winner |
|---|---|---|---|
| League Score | 97.3 | 76.4 | Claude Fable 5.1 |
| Coding (SWE-bench %) | — | — | — |
| Reasoning (GPQA %) | 93.7 | — | — |
| Context (tokens) | 1000000 | 1048576 | Muse Wonder |
| Speed (tok/s) | — | — | — |
| Price (blended $/1M) | $20.00 | $8.00 | Muse Wonder (cheaper) |
Tale of the tape
| Spec | Claude Fable 5.1 | Muse Wonder |
|---|---|---|
| Maker | Anthropic | Meta |
| Released | Sep 1, 2026 | Oct 12, 2026 |
| League Score | 97 | 76 |
| Context | 1,000,000 tokens | 1,048,576 tokens |
| Max output | 128,000 | — |
| $/1M input | $10.00 | $4.00 |
| $/1M output | $50.00 | $20.00 |
| Weights | Closed | Closed |
| Speed | — | — |
Head-to-head benchmarks (shared only)
| Benchmark | Claude Fable 5.1 | Muse Wonder |
|---|---|---|
| LiveBench overall | 88.0 | 78.1 |
Cost at three workloads
| Workload | Claude Fable 5.1 | Muse Wonder |
|---|---|---|
| Light — 1M in / 250K out | $22.50 | $9.00 |
| Standard — 10M in / 2.5M out | $225.00 | $90.00 |
| Long-context — 50M in / 5M out | $750.00 | $300.00 |
The pick
Pick Claude Fable 5.1 if you want the higher overall League Score.
Pick Muse Wonder if you need the bigger context window; you want the lower running cost.
All figures from the model database — sources and dates on each model page. Cost your own workload or compare a different pair.
Frequently asked questions
Which is better overall, Claude Fable 5.1 or Muse Wonder?
Claude Fable 5.1 leads on overall League Score, 97 to 76 — a gap of 21 points on a composite of sourced benchmarks. That is overall form, not every category: check the per-category verdicts before choosing.
Which is cheaper, Claude Fable 5.1 or Muse Wonder?
Muse Wonder is cheaper: $8.00 vs $20.00 blended per 1M tokens (3:1 input/output mix) — about 2.5x less per token.
Which has the bigger context window, Claude Fable 5.1 or Muse Wonder?
Muse Wonder, with 1M of context against 1M for Claude Fable 5.1.
Are Claude Fable 5.1 and Muse Wonder open source?
Claude Fable 5.1 is closed weights — API access only; Muse Wonder is closed weights — API access only.