Muse Wonder vs Claude Fable 5.1 vs GPT-5.6 Sol
Too close to call on our weighted score (Muse Wonder 68, Claude Fable 5.1 66, GPT-5.6 Sol 66). The right pick depends on what you value most.
MetaMuse Wonder
68/100- ECI161.7
- Price$4.00 / $20.00
- Context1.05M
AnthropicClaude Fable 5.1
66/100- ECI166.4
- Price$10.00 / $50.00
- Context1M
OpenAIGPT-5.6 Sol
66/100- ECI162.6
- Price$4.00 / $20.00
- Context1.05M
Too close to call
It is close. Our weighted score puts them within 2 points (Muse Wonder 68/100, Claude Fable 5.1 66/100, GPT-5.6 Sol 66/100), so choose by what matters most for your work: Claude Fable 5.1 for raw capability and Muse Wonder on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityClaude Fable 5.1Capabilities Index (ECI): Claude Fable 5.1 166.4 · GPT-5.6 Sol 162.6 · Muse Wonder 161.7
- Lowest priceMuse Wonder and GPT-5.6 SolMuse Wonder $8.00 · GPT-5.6 Sol $8.00 · Claude Fable 5.1 $20.00 per 1M tokens (3:1 blend)
- Longest contextGPT-5.6 Sol and Muse WonderGPT-5.6 Sol 1,050,000 · Muse Wonder 1,048,576 · Claude Fable 5.1 1,000,000 tokens
- Widest inputsMuse WonderMuse Wonder: Text, Images, PDFs, Audio, Video · Claude Fable 5.1: Text, Images, PDFs · GPT-5.6 Sol: Text, Images, PDFs
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Muse Wonder | Claude Fable 5.1 | GPT-5.6 Sol |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 91 | 97 | 92 |
| Price | 25% | 7 | 0 | 7 |
| Inputs & features | 15% | 100 | 80 | 80 |
| Context window | 10% | 61 | 60 | 61 |
| Overall | 100% | 68/100 | 66/100 | 66/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Muse WonderMeta | Claude Fable 5.1Anthropic | GPT-5.6 SolOpenAI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 161.7 | 166.4 (best) | 162.6 |
| ECI rank | #13 of 165 | #6 of 165 (best) | #12 of 165 |
| GPQA DiamondGraduate-level science questions | — | — | 93.5% |
| FrontierMath Tiers 1–3Research-level mathematics | 82.1% | 90.2% (best) | 89.1% |
| OTIS Mock AIME 2024–2025Competition mathematics | 99.4% | 100% (best) | 100% (best) |
| SimpleQA VerifiedShort factual questions | — | 70.8% (best) | 69.7% |
| Price per million tokens | |||
| Input | $4.00 (best) | $10.00 | $4.00 (best) |
| Output | $20.00 (best) | $50.00 | $20.00 (best) |
| Cached input | $0.20 (best) | $0.25 | $0.40 |
| Blended (3:1) | $8.00 (best) | $20.00 | $8.00 (best) |
| Long-context rate | Same rate | Same rate | Over 272K: $8.00 / $30.00 |
| Price source | Official Meta API | Official Anthropic API | Official OpenAI API |
| Limits | |||
| Context window | 1,048,576 tokens | 1,000,000 tokens | 1,050,000 tokens (best) |
| Max output | 131,072 tokens (best) | 128,000 tokens | 128,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | Yes | Yes | Yes |
| Audio | Yes | No | No |
| Video | Yes | No | No |
| Reasoning | Yesminimal · low · medium · high · xhigh · max | Yeslow · medium · high · xhigh · max | Yeslow · medium · high · xhigh · max |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | Yes | Yes |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | muse-wonder-1.0 | claude-fable-5-1 | gpt-5.6-sol |
| API providers | 9 | 37 | 49 (best) |
| Released | Oct 12, 2026 | Sep 1, 2026 | Jul 9, 2026 |
| Knowledge cutoff | — | Jun 2026 | Feb 16, 2026 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Muse Wonder$80.00
- Claude Fable 5.1$200.00
- GPT-5.6 Sol$80.00
Which should you choose?
Which is better: Muse Wonder, Claude Fable 5.1 or GPT-5.6 Sol?
It is close. Our weighted score puts them within 2 points (Muse Wonder 68/100, Claude Fable 5.1 66/100, GPT-5.6 Sol 66/100), so choose by what matters most for your work: Claude Fable 5.1 for raw capability and Muse Wonder on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, Muse Wonder, Claude Fable 5.1 or GPT-5.6 Sol?
Muse Wonder is cheaper at $4.00 input / $20.00 output per million tokens (official Meta API price). GPT-5.6 Sol costs $4.00 input / $20.00 output per million tokens (official OpenAI API price); Claude Fable 5.1 costs $10.00 input / $50.00 output per million tokens (official Anthropic API price). At a typical mix of three input tokens to one output token, that is $8.00 per million tokens for Muse Wonder versus $8.00 for GPT-5.6 Sol (1× as much) and $20.00 for Claude Fable 5.1 (2.5× as much).
Which scores higher on benchmarks?
Claude Fable 5.1 scores higher on the Capabilities Index (ECI): Claude Fable 5.1 166.4 (#6 of 165), GPT-5.6 Sol 162.6 (#12 of 165) and Muse Wonder 161.7 (#13 of 165). The confidence ranges of the top two overlap (163.6–170.8 vs 159.6–166.2), so treat the gap as small. On individual benchmarks: FrontierMath Tiers 1–3 — Claude Fable 5.1 90.2%, GPT-5.6 Sol 89.1%, Muse Wonder 82.1%; OTIS Mock AIME 2024–2025 — Claude Fable 5.1 100%, GPT-5.6 Sol 100%, Muse Wonder 99.4%.
Which is better for coding?
There are no published SWE-bench Verified results for Muse Wonder, Claude Fable 5.1 and GPT-5.6 Sol yet, so there is no like-for-like coding score. On overall capability, Claude Fable 5.1 leads, which tends to carry over to coding, but test on your own codebase. All three support tool calling for agent workflows.
Which has the bigger context window?
GPT-5.6 Sol and Muse Wonder have the largest context windows (1,050,000 and 1,048,576 tokens), against 1,000,000 for Claude Fable 5.1. Maximum output per response: Muse Wonder up to 131,072, Claude Fable 5.1 up to 128,000, GPT-5.6 Sol up to 128,000 tokens.
Which can read images, PDFs, audio or video?
Muse Wonder accepts text, images, PDFs, audio and video; Claude Fable 5.1 accepts text, images and PDFs; GPT-5.6 Sol accepts text, images and PDFs. Muse Wonder handles the widest range of inputs.
Are any of these open source?
No. Muse Wonder, Claude Fable 5.1 and GPT-5.6 Sol are proprietary and only available through APIs and apps.
Which is newer?
Muse Wonder is the newest, released Oct 12, 2026. Claude Fable 5.1 came out Sep 1, 2026; GPT-5.6 Sol came out Jul 9, 2026. Knowledge cutoff: Claude Fable 5.1 Jun 2026, GPT-5.6 Sol Feb 16, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
