Model comparison
Claude Fable 5.1 vs Mixtral 8x7B
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 27.1 on the Noometry Index. Mixtral 8x7B costs 29× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.
Last verified . 19 shared benchmarks.
Mistral AISummary
- They share 19 benchmarks with published results for both. Claude Fable 5.1 scores higher in 8 categories and Mixtral 8x7B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5.1 leads 89.6 to 18.8.
- The biggest single-benchmark swing is DTBench: 97.6% for Claude Fable 5.1 and 49.6% for Mixtral 8x7B.
- Mixtral 8x7B is cheaper at $0.70 / $0.70 per million input/output tokens, against $10 / $50 for Claude Fable 5.1.
- Claude Fable 5.1 accepts more context: 1M tokens versus 32K.
- Mixtral 8x7B has downloadable open weights; the other is API-only.
Side by side
| Claude Fable 5.1 | Mixtral 8x7B | |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 69.0 | 27.1 |
| Released | 2026-09-01 | 2023-12-11 |
| Weights | Proprietary | Open |
| Context window | 1M | 32K |
| Max output | 128K | 32K |
| Input $ / M tokens | $10 | $0.70 |
| Output $ / M tokens | $50 | $0.70 |
| Results tracked | 52 | 38 |
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Category by category
Coding Claude Fable 5.1 leads
Claude Fable 5.1: 74.7 (#1), Mixtral 8x7B: 32.8 (#269)
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Coding | 1528 | 1126 |
| FrontierCode | 50.9% | — |
| CursorBench | 51.8% | — |
| LMArena WebDev | 1744 | — |
| FrontierSWE | 56.3% | — |
| SciCode | 63.1% | — |
| GSO | 88.2% | — |
| WeirdML | 92.9% | — |
| MirrorCode | 73.3% | — |
| ALE-Bench | 2,143 | — |
| HumanEval+ | — | 39.6% |
| MBPP+ | — | 49.7% |
Agentic & Tool Use Not comparable
Claude Fable 5.1: 50.7 (#5), Mixtral 8x7B: —
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| APEX-Agents | 68.6% | — |
| Remote Labor Index | 17.9% | — |
| GDP.pdf | 29.6% | — |
| Vending-Bench 2 | 5,422 | — |
Reasoning Claude Fable 5.1 leads
Claude Fable 5.1: 76.7 (#7), Mixtral 8x7B: 18.2 (#285)
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Hard Prompts | 1526 | 1115 |
| DTBench | 97.6% | 49.6% |
| Epoch Capabilities Index | 164.7 | 118.47 |
| ARC-AGI-2 | 90% | — |
| NYT Connections (extended) | 90% | — |
| ARC-AGI-1 | 97.5% | — |
| CritPt | 31.1% | — |
| Chess Puzzles | 47% | — |
| EBR-Bench | 57.1% | — |
| Mystery Game Puzzles | 58% | — |
| LMCA | 65.5% | — |
| Adversarial NLI | — | 55.2% |
| ForecastBench | — | 56.3 |
| HellaSwag | — | 86.7% |
| PIQA | — | 83.6% |
| WinoGrande | — | 77.2% |
Math Claude Fable 5.1 leads
Claude Fable 5.1: 89.6 (#4), Mixtral 8x7B: 18.8 (#289)
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Math | 1525 | 1147 |
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| Omni-MATH | — | 10.5% |
| MATH Level 5 | — | 10% |
| FrontierMath Erdős | 0% | — |
| GSM8K | — | 74.4% |
Knowledge Claude Fable 5.1 leads
Claude Fable 5.1: 69.6 (#6), Mixtral 8x7B: 11.0 (#301)
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Expert | 1535 | 1088 |
| GPQA Diamond | — | 30.6% |
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
| MMLU-Pro | — | 33.5% |
| GPQA (HELM) | — | 29.6% |
| ARC (AI2) Challenge | — | 87.3% |
| MMLU | — | 70.6% |
| OpenBookQA | — | 85.8% |
| TriviaQA | — | 82.2% |
Multimodal Not comparable
Claude Fable 5.1: 53.9 (#4), Mixtral 8x7B: —
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Vision | 1318 | — |
| Blueprint-Bench 2 | 41.9% | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |
Multilingual Claude Fable 5.1 leads
Claude Fable 5.1: 59.1 (#3), Mixtral 8x7B: 29.6 (#266)
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Non-English | 1507 | 1077 |
| LMArena Chinese | 1586 | 1055 |
| LMArena French | 1525 | 1166 |
| LMArena German | 1500 | 1114 |
| LMArena Japanese | 1543 | 931 |
| LMArena Korean | 1534 | 968 |
| LMArena Russian | 1521 | 1090 |
| LMArena Spanish | 1516 | 1111 |
Instruction Following Claude Fable 5.1 leads
Claude Fable 5.1: 79.2 (#6), Mixtral 8x7B: 51.0 (#297)
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Instruction Following | 1517 | 1109 |
| IFEval | — | 57.5% |
Long Context Claude Fable 5.1 leads
Claude Fable 5.1: 46.7 (#20), Mixtral 8x7B: 33.4 (#260)
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Longer Query | 1522 | 1103 |
Writing & Preference Claude Fable 5.1 leads
Claude Fable 5.1: 79.2 (#2), Mixtral 8x7B: 34.2 (#270)
| Benchmark | Claude Fable 5.1 | Mixtral 8x7B |
|---|---|---|
| LMArena Text | 1510 | 1132 |
| LMArena Creative Writing | 1507 | 1109 |
| LMArena Multi-Turn | 1492 | 1115 |
| EQ-Bench Creative Writing | 2162 | — |
| WildBench | — | 67.3% |
Frequently asked questions
Is Claude Fable 5.1 better than Mixtral 8x7B?
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 27.1 on the Noometry Index. Mixtral 8x7B costs 29× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.
Which is cheaper, Claude Fable 5.1 or Mixtral 8x7B?
Mixtral 8x7B is cheaper. It lists at $0.70 per million input tokens and $0.70 per million output tokens; Claude Fable 5.1 lists at $10 and $50.
Is Claude Fable 5.1 or Mixtral 8x7B better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 32.8 in the Noometry coding category.
Which has the bigger context window?
Claude Fable 5.1 does, with 1M tokens against 32K.
How many benchmarks do Claude Fable 5.1 and Mixtral 8x7B share?
19 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Mixtral 8x7B has 38.