Claude Fable 5.1 vs MiMo-V2.6-Flash
Updated October 21, 2026. 62 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick Claude Fable 5.1 for coding: it scores 89.1 on the Vibe Coding Index against 61.9 for MiMo-V2.6-Flash.
Pick MiMo-V2.6-Flash when output tokens cost 178.6x less, or when the context window is larger, 1.05M against 1M tokens.
- Shared results
- 62
- Claude Fable 5.1 only
- 62
- MiMo-V2.6-Flash only
- 4
- Like-for-like categories
- 7 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, four public coding benchmarks
Claude Fable 5.1
Claude Fable 5.1 scores 89.1 against 61.9.
2 and 1 benchmarks behind the scores
Intelligence
AA Intelligence Index
Claude Fable 5.1
Claude Fable 5.1 leads, 53.4 against 37.9.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Claude Fable 5.1 has a AA Agentic Index result, 57.9.
Directional only
Reasoning
GPQA Diamond
No call
Only Claude Fable 5.1 has a GPQA Diamond result, 93.4%.
Directional only
Knowledge
MMLU Pro
No call
Only Claude Fable 5.1 has a MMLU Pro result, 92.4%.
Directional only
Web design
Design Arena: websites
No call
Only Claude Fable 5.1 has a Design Arena: websites result, 1313.
Directional only
General
Vals Index
No call
Only MiMo-V2.6-Flash has a Vals Index result, 54.8%.
Directional only
Long documents
Listed context window
MiMo-V2.6-Flash
MiMo-V2.6-Flash takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
MiMo-V2.6-Flash
Claude Fable 5.1 $0.035, MiMo-V2.6-Flash $0.0003 per turn.
List prices
At a glance
- Coding index
- Claude Fable 5.1 89.1 from 2 benchmarks, MiMo-V2.6-Flash 61.9 from 1 benchmark.
- Widest category
- Math, 18.8 points apart on average over 3 shared benchmarks.
- Widest single gap
- IOI (Vals AI): Claude Fable 5.1 90.8% against MiMo-V2.6-Flash 47.7%, 43.1 points apart on a 0 to 100 scale.
- Output price
- Claude Fable 5.1 $50.00 against MiMo-V2.6-Flash $0.28 per million output tokens, 178.6x apart.
- Context window
- Claude Fable 5.1 takes 1M tokens, MiMo-V2.6-Flash 1.05M.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | Claude Fable 5.1 | Bars | MiMo-V2.6-Flash | Ties |
|---|---|---|---|---|
| Coding | 14 | 1 | ||
| Intelligence | 1 | 0 | ||
| Agentic work | 6 | 0 | ||
| Reasoning | 7 | 0 | ||
| Math | 3 | 0 | ||
| Knowledge | 5 | 0 | ||
| General | 25 | 0 | ||
| All shared boards | 61 | 1 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index141
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| LiveBench coding | 97.7% | Not measured | Only Claude Fable 5.1 measured |
| LMArena WebDev | 1743 | 1634 | Claude Fable 5.1 |
| AA Coding Index | 81.6 | Not measured | Only Claude Fable 5.1 measured |
| LiveCodeBench (Vals AI) | 90.5% | Not measured | Only Claude Fable 5.1 measured |
| Terminal-Bench 4 (Vals AI) | 58.1% | 24.2% | Claude Fable 5.1 |
| Vibe Code Bench (Vals AI) | 90.3% | 79.0% | Claude Fable 5.1 |
| Code migration (Vals AI) | 54.6% | 40.9% | Claude Fable 5.1 |
| ProgramBench (Vals AI) | 7.0% | 0.5% | Claude Fable 5.1 |
| IOI (Vals AI) | 90.8% | 47.7% | Claude Fable 5.1 |
| Terminal-Bench 2.1 (Vals AI) | 85.0% | 76.4% | Claude Fable 5.1 |
| SWE-bench Multimodal (Vals AI) | 61.3% | Not measured | Only Claude Fable 5.1 measured |
| Vibe Code Bench 1-100 (Vals AI) | 28.0% | Not measured | Only Claude Fable 5.1 measured |
| SkillsBench (Vals AI) | 61.5% | Not measured | Only Claude Fable 5.1 measured |
| CyberBench (Vals AI) | 70.4% | 75.4% | MiMo-V2.6-Flash |
| SciCode | 63.1% | 51.3% | Claude Fable 5.1 |
| FrontierCode | 50.9% | Not measured | Only Claude Fable 5.1 measured |
| FrontierSWE | 56.3% | Not measured | Only Claude Fable 5.1 measured |
| GSO-Bench | 88.2% | Not measured | Only Claude Fable 5.1 measured |
| WeirdML | 92.9% | Not measured | Only Claude Fable 5.1 measured |
| MirrorCode | 73.3% | Not measured | Only Claude Fable 5.1 measured |
| ALE-Bench | 2143.2 | 1244.2 | Claude Fable 5.1 |
| LMArena Text: coding | 1532 | 1499 | Claude Fable 5.1 |
| LMArena Text: software and IT | 1530 | 1497 | Claude Fable 5.1 |
| LMArena WebDev: React | 1792 | 1648 | Claude Fable 5.1 |
| LMArena WebDev: HTML | 1684 | 1641 | Claude Fable 5.1 |
| LMArena WebDev: from an image | 1722 | 1596 | Claude Fable 5.1 |
| Neither model has a result on the other 12 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| AA Intelligence Index | 53.4 | 37.9 | Claude Fable 5.1 |
| Epoch Capabilities Index | 166.5 | Not measured | Only Claude Fable 5.1 measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index60
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| AA Agentic Index | 57.9 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: agents building web apps | 1318 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: agents building full-stack apps | 1326 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: agents building mobile apps | 1267 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: agents building Godot games | 1327 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: PowerPoint slides | 1328 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: spreadsheets | 1374 | Not measured | Only Claude Fable 5.1 measured |
| LiveBench research | 82.0% | Not measured | Only Claude Fable 5.1 measured |
| LiveBench browser | 100.0% | Not measured | Only Claude Fable 5.1 measured |
| LiveBench long agentic | 80.8% | Not measured | Only Claude Fable 5.1 measured |
| SREBench (Vals AI) | 22.9% | 4.2% | Claude Fable 5.1 |
| Finance Agent (Vals AI) | 58.9% | 56.3% | Claude Fable 5.1 |
| Tax Agent Bench (Vals AI) | 49.2% | 28.5% | Claude Fable 5.1 |
| Legal Research Bench (Vals AI) | 55.3% | 38.0% | Claude Fable 5.1 |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 13.3% | Only MiMo-V2.6-Flash measured |
| Excel Modeling Benchmark (Vals AI) | 76.7% | 65.5% | Claude Fable 5.1 |
| BioMysteryBench (Vals AI) | Not measured | 69.3% | Only MiMo-V2.6-Flash measured |
| Terminal-Bench-Science (Vals AI) | 40.0% | 4.3% | Claude Fable 5.1 |
| Vals Science Index | Not measured | 31.7% | Only MiMo-V2.6-Flash measured |
| Time Horizon Index (Vals AI) | 63.3% | Not measured | Only Claude Fable 5.1 measured |
| CUA-bench (Vals AI) | 13.2% | Not measured | Only Claude Fable 5.1 measured |
| Robo-bench (Vals AI) | 5.8% | Not measured | Only Claude Fable 5.1 measured |
| APEX-Agents | 68.6% | Not measured | Only Claude Fable 5.1 measured |
| Remote Labor Index | 17.9% | Not measured | Only Claude Fable 5.1 measured |
| SpireClimb | 2.0% | Not measured | Only Claude Fable 5.1 measured |
| Vending-Bench 2 | $5,422 | Not measured | Only Claude Fable 5.1 measured |
| LMArena Search | 1246 | Not measured | Only Claude Fable 5.1 measured |
| Neither model has a result on the other 12 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index70
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| GPQA Diamond | 93.4% | Not measured | Only Claude Fable 5.1 measured |
| LiveBench reasoning | 91.7% | Not measured | Only Claude Fable 5.1 measured |
| MysteryMechanism (Vals AI) | 47.8% | 21.6% | Claude Fable 5.1 |
| MMMU Pro (Vals AI) | 90.6% | Not measured | Only Claude Fable 5.1 measured |
| GPQA Diamond (Artificial Analysis run) | 93.7% | Not measured | Only Claude Fable 5.1 measured |
| Humanity's Last Exam (Artificial Analysis run) | 59.1% | 35.1% | Claude Fable 5.1 |
| ARC-AGI | 97.5% | Not measured | Only Claude Fable 5.1 measured |
| ARC-AGI-2 | 90.0% | Not measured | Only Claude Fable 5.1 measured |
| Chess puzzles | 48.0% | Not measured | Only Claude Fable 5.1 measured |
| Mystery game puzzles | 58.0% | Not measured | Only Claude Fable 5.1 measured |
| EBR-bench | 57.1% | Not measured | Only Claude Fable 5.1 measured |
| LMArena Text: hard prompts | 1528 | 1475 | Claude Fable 5.1 |
| LMArena Text: expert | 1544 | 1496 | Claude Fable 5.1 |
| LMArena Text: hard prompts in English | 1522 | 1493 | Claude Fable 5.1 |
| LMArena Vision: diagrams | 1343 | 1276 | Claude Fable 5.1 |
| LMArena Vision: homework | 1345 | 1283 | Claude Fable 5.1 |
| Neither model has a result on the other 5 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index30
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| OTIS Mock AIME | 100.0% | Not measured | Only Claude Fable 5.1 measured |
| FrontierMath, tiers 1 to 3 | 90.2% | Not measured | Only Claude Fable 5.1 measured |
| FrontierMath, tier 4 | 87.8% | Not measured | Only Claude Fable 5.1 measured |
| ProofBench | 100.0% | 63.0% | Claude Fable 5.1 |
| LMArena Text: math | 1531 | 1476 | Claude Fable 5.1 |
| LMArena Text: mathematical work | 1541 | 1478 | Claude Fable 5.1 |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| MMLU Pro | 92.4% | Not measured | Only Claude Fable 5.1 measured |
| LegalBench (Vals AI) | 88.5% | Not measured | Only Claude Fable 5.1 measured |
| TaxEval (Vals AI) | 76.0% | Not measured | Only Claude Fable 5.1 measured |
| MortgageTax (Vals AI) | 70.8% | Not measured | Only Claude Fable 5.1 measured |
| MedCode (Vals AI) | 53.5% | 41.1% | Claude Fable 5.1 |
| SimpleQA Verified | 70.8% | Not measured | Only Claude Fable 5.1 measured |
| LMArena Text: science | 1532 | 1462 | Claude Fable 5.1 |
| LMArena Text: medicine and healthcare | 1531 | 1439 | Claude Fable 5.1 |
| LMArena Text: legal and government | 1514 | 1441 | Claude Fable 5.1 |
| LMArena Text: business and finance | 1493 | 1454 | Claude Fable 5.1 |
| Neither model has a result on the other 7 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| Design Arena: websites | 1313 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: UI components | 1338 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: game dev | 1382 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: data viz | 1344 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: 3D | 1393 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: all code categories | 1336 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: SVG | 1301 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: ASCII art | 1324 | Not measured | Only Claude Fable 5.1 measured |
| LiveBench design | 83.4% | Not measured | Only Claude Fable 5.1 measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index250
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| Vals Index | Not measured | 54.8% | Only MiMo-V2.6-Flash measured |
| LiveBench data analysis | 80.3% | Not measured | Only Claude Fable 5.1 measured |
| Public Benefits Bench (Vals AI) | 74.9% | 67.6% | Claude Fable 5.1 |
| SAGE (Vals AI) | 48.5% | 43.5% | Claude Fable 5.1 |
| MedScribe (Vals AI) | 91.3% | 85.3% | Claude Fable 5.1 |
| Long context reasoning (AA-LCR) | 85.3% | 74.3% | Claude Fable 5.1 |
| DTBench | 97.6% | Not measured | Only Claude Fable 5.1 measured |
| LMCA | 65.5% | Not measured | Only Claude Fable 5.1 measured |
| Furniture assembly | 70.0% | Not measured | Only Claude Fable 5.1 measured |
| LMArena Text | 1512 | 1453 | Claude Fable 5.1 |
| LMArena Text: instruction following | 1518 | 1452 | Claude Fable 5.1 |
| LMArena Text: creative writing | 1509 | 1403 | Claude Fable 5.1 |
| LMArena Vision | 1319 | 1256 | Claude Fable 5.1 |
| LMArena Text: English | 1506 | 1476 | Claude Fable 5.1 |
| LMArena Text: non-English | 1508 | 1431 | Claude Fable 5.1 |
| LMArena Text: Chinese | 1584 | 1509 | Claude Fable 5.1 |
| LMArena Text: German | 1499 | 1458 | Claude Fable 5.1 |
| LMArena Text: Japanese | 1562 | 1359 | Claude Fable 5.1 |
| LMArena Text: Korean | 1517 | 1425 | Claude Fable 5.1 |
| LMArena Text: French | 1523 | 1480 | Claude Fable 5.1 |
| LMArena Text: Spanish | 1520 | 1453 | Claude Fable 5.1 |
| LMArena Text: Russian | 1520 | 1409 | Claude Fable 5.1 |
| LMArena Text: Polish | 1525 | 1455 | Claude Fable 5.1 |
| LMArena Text: multi-turn | 1493 | 1447 | Claude Fable 5.1 |
| LMArena Text: longer queries | 1524 | 1459 | Claude Fable 5.1 |
| LMArena Text: writing and language | 1510 | 1424 | Claude Fable 5.1 |
| LMArena Text: entertainment and media | 1497 | 1415 | Claude Fable 5.1 |
| LMArena Vision: English | 1313 | 1269 | Claude Fable 5.1 |
| LMArena Vision: Chinese | 1391 | Not measured | Only Claude Fable 5.1 measured |
| LMArena Vision: reading text | 1327 | 1270 | Claude Fable 5.1 |
| LMArena Vision: humor | 1318 | Not measured | Only Claude Fable 5.1 measured |
| LMArena Vision: creative writing | 1330 | 1231 | Claude Fable 5.1 |
| Neither model has a result on the other 14 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Fable 5.1 | MiMo-V2.6-Flash | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
MiMo-V2.6-Flash costs less
Repository review
50K input + 3K output tokens
MiMo-V2.6-Flash costs less
Agent loop
200K input + 10K output tokens
MiMo-V2.6-Flash costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Anthropic Claude Fable 5.1 | Xiaomi MiMo-V2.6-Flash |
|---|---|---|
| Maker | Anthropic | Xiaomi |
| Weights | No public weights listed | Open weights |
| Released | September 1, 2026 | September 21, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $10.00 | $0.14 |
| Output $/Mtok | $50.00 | $0.28 |
| Coding index | 89.1 | 61.9 |
| Independent measurements behind it | 2 | 1 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Fable 5.1 better than MiMo-V2.6-Flash for coding?
Pick Claude Fable 5.1 for coding: it scores 89.1 on the Vibe Coding Index against 61.9 for MiMo-V2.6-Flash. Pick MiMo-V2.6-Flash when output tokens cost 178.6x less, or when the context window is larger, 1.05M against 1M tokens.
Which is cheaper, Claude Fable 5.1 or MiMo-V2.6-Flash?
Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens; MiMo-V2.6-Flash costs $0.14 and $0.28. Cost per solved task is known for neither of them.
Which has the bigger context window, Claude Fable 5.1 or MiMo-V2.6-Flash?
MiMo-V2.6-Flash, with 1.05M tokens against 1M.
How many benchmarks is the Claude Fable 5.1 vs MiMo-V2.6-Flash comparison based on?
62 benchmarks have a result for both models as of October 21, 2026. Claude Fable 5.1's coding index rests on 2 independent benchmarks and MiMo-V2.6-Flash's on 1. Where only one model has a result, the page says so instead of naming a winner.