Claude Fable 5.1 vs MiMo-V2.5
Claude Fable 5.1 leads MiMo-V2.5 on coding, 84.2 to 50.0 on the Vibe Coding Index, and MiMo-V2.5 costs 148.8x less per output token ($0.336 vs $50.00 per million). Updated October 22, 2026; 73 benchmarks have a result for both.
Claude Fable 5.1 or MiMo-V2.5: which to pick
Pick Claude Fable 5.1 for coding: it scores 84.2 on the Vibe Coding Index against 50.0 for MiMo-V2.5.
Pick MiMo-V2.5 for output tokens 148.8x cheaper ($0.336 vs $50.00 per million) and a larger context window (1.05M against 1M tokens).
- Shared results
- 73
- Claude Fable 5.1 only
- 51
- MiMo-V2.5 only
- 7
- Like-for-like categories
- 8 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
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, six public coding benchmarks
Claude Fable 5.1
Claude Fable 5.1 scores 84.2 against 50.0.
5 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
Claude Fable 5.1
Claude Fable 5.1 leads, 53.4 against 21.8.
Same board, both measured
Agentic work
AA Agentic Index
Claude Fable 5.1
Claude Fable 5.1 leads, 57.9 against 15.8.
Same board, both measured
Reasoning
GPQA Diamond
Claude Fable 5.1
Claude Fable 5.1 leads, 93.4% against 81.6%.
Same board, both measured
Knowledge
MMLU Pro
Claude Fable 5.1
Claude Fable 5.1 leads, 92.4% against 82.9%.
Same board, both measured
Web design
Design Arena: websites
Claude Fable 5.1
Claude Fable 5.1 leads, 1312 against 1265.
Same board, both measured
Long documents
Listed context window
MiMo-V2.5
MiMo-V2.5 takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
MiMo-V2.5
Claude Fable 5.1 $0.035, MiMo-V2.5 $0.0003 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only MiMo-V2.5 has the number, $0.01.
Directional only
At a glance
- Coding index
- Claude Fable 5.1 84.2 from 5 benchmarks, MiMo-V2.5 50.0 from 3 benchmarks.
- Widest category
- Math, 38.2 points apart on average over 3 shared benchmarks.
- Widest single gap
- ProofBench: Claude Fable 5.1 100.0% against MiMo-V2.5 16.0%, 84.0 points apart on a 0 to 100 scale.
- Output price
- Claude Fable 5.1 $50.00 against MiMo-V2.5 $0.336 per million output tokens, 148.8x apart.
- Context window
- Claude Fable 5.1 takes 1M tokens, MiMo-V2.5 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-V2.5 | Ties |
|---|---|---|---|---|
| Coding | 12 | 0 | ||
| Intelligence | 1 | 0 | ||
| Agentic work | 5 | 0 | ||
| Reasoning | 9 | 0 | ||
| Math | 3 | 0 | ||
| Knowledge | 9 | 0 | ||
| Web design | 8 | 0 | ||
| General | 26 | 0 | ||
| All shared boards | 73 | 0 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index120
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | Leader |
|---|---|---|---|
| LiveBench coding | 97.7% | Not measured | Only Claude Fable 5.1 measured |
| LMArena WebDev | 1743 | 1438 | Claude Fable 5.1 |
| AA Coding Index | 81.6 | 56.8 | Claude Fable 5.1 |
| LiveCodeBench (Vals AI) | 90.5% | 81.5% | Claude Fable 5.1 |
| SWE-bench Verified (Vals AI) | Not measured | 71.0% | Only MiMo-V2.5 measured |
| Terminal-Bench 4 (Vals AI) | 58.1% | Not measured | Only Claude Fable 5.1 measured |
| Vibe Code Bench (Vals AI) | 90.3% | 42.2% | Claude Fable 5.1 |
| Code migration (Vals AI) | 54.6% | 14.2% | Claude Fable 5.1 |
| ProgramBench (Vals AI) | 7.0% | Not measured | Only Claude Fable 5.1 measured |
| IOI (Vals AI) | 90.8% | Not measured | Only Claude Fable 5.1 measured |
| Terminal-Bench 2.1 (Vals AI) | 85.0% | 60.7% | 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% | Not measured | Only Claude Fable 5.1 measured |
| SciCode | 63.1% | 43.9% | Claude Fable 5.1 |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 41.7% | Only MiMo-V2.5 measured |
| 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 | 514.0 | Claude Fable 5.1 |
| LMArena Text: coding | 1532 | 1469 | Claude Fable 5.1 |
| LMArena Text: software and IT | 1530 | 1463 | Claude Fable 5.1 |
| LMArena WebDev: React | 1792 | 1425 | Claude Fable 5.1 |
| LMArena WebDev: HTML | 1684 | 1429 | Claude Fable 5.1 |
| LMArena WebDev: from an image | 1722 | Not measured | Only Claude Fable 5.1 measured |
| Neither model has a result on the other 11 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | Leader |
|---|---|---|---|
| AA Intelligence Index | 53.4 | 21.8 | 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 index50
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | Leader |
|---|---|---|---|
| AA Agentic Index | 57.9 | 15.8 | Claude Fable 5.1 |
| 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 | 1305 | Not measured | Only Claude Fable 5.1 measured |
| Design Arena: spreadsheets | 1380 | 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% | Not measured | Only Claude Fable 5.1 measured |
| Finance Agent (Vals AI) | 58.9% | 36.7% | Claude Fable 5.1 |
| Tax Agent Bench (Vals AI) | 49.2% | 7.8% | Claude Fable 5.1 |
| Legal Research Bench (Vals AI) | 55.3% | 9.1% | Claude Fable 5.1 |
| Excel Modeling Benchmark (Vals AI) | 76.7% | 55.1% | Claude Fable 5.1 |
| Terminal-Bench-Science (Vals AI) | 40.0% | Not measured | Only Claude Fable 5.1 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 |
| τ²-Bench Telecom | Not measured | 90.6% | Only MiMo-V2.5 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 16 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index90
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | Leader |
|---|---|---|---|
| GPQA Diamond | 93.4% | 81.6% | Claude Fable 5.1 |
| LiveBench reasoning | 91.7% | Not measured | Only Claude Fable 5.1 measured |
| MysteryMechanism (Vals AI) | 47.8% | Not measured | Only Claude Fable 5.1 measured |
| MMMU Pro (Vals AI) | 90.6% | 80.0% | Claude Fable 5.1 |
| GPQA Diamond (Artificial Analysis run) | 93.7% | 84.9% | Claude Fable 5.1 |
| Humanity's Last Exam (Artificial Analysis run) | 59.1% | 27.2% | 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 | 1450 | Claude Fable 5.1 |
| LMArena Text: expert | 1544 | 1459 | Claude Fable 5.1 |
| LMArena Text: hard prompts in English | 1522 | 1461 | Claude Fable 5.1 |
| LMArena Vision: diagrams | 1343 | 1269 | Claude Fable 5.1 |
| LMArena Vision: homework | 1345 | 1262 | Claude Fable 5.1 |
| Neither model has a result on the other 6 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index30
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | 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% | 16.0% | Claude Fable 5.1 |
| LMArena Text: math | 1531 | 1436 | Claude Fable 5.1 |
| LMArena Text: mathematical work | 1541 | 1451 | 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 index90
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | Leader |
|---|---|---|---|
| MMLU Pro | 92.4% | 82.9% | Claude Fable 5.1 |
| LegalBench (Vals AI) | 88.5% | 78.9% | Claude Fable 5.1 |
| CorpFin (Vals AI) | Not measured | 59.9% | Only MiMo-V2.5 measured |
| TaxEval (Vals AI) | 76.0% | 71.8% | Claude Fable 5.1 |
| MortgageTax (Vals AI) | 70.8% | 59.3% | Claude Fable 5.1 |
| MedCode (Vals AI) | 53.5% | 31.9% | Claude Fable 5.1 |
| SimpleQA Verified | 70.8% | Not measured | Only Claude Fable 5.1 measured |
| LMArena Text: science | 1532 | 1440 | Claude Fable 5.1 |
| LMArena Text: medicine and healthcare | 1531 | 1432 | Claude Fable 5.1 |
| LMArena Text: legal and government | 1514 | 1425 | Claude Fable 5.1 |
| LMArena Text: business and finance | 1493 | 1432 | Claude Fable 5.1 |
| Neither model has a result on the other 7 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index80
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | Leader |
|---|---|---|---|
| Design Arena: websites | 1312 | 1265 | Claude Fable 5.1 |
| Design Arena: UI components | 1336 | 1255 | Claude Fable 5.1 |
| Design Arena: game dev | 1381 | 1249 | Claude Fable 5.1 |
| Design Arena: data viz | 1344 | 1250 | Claude Fable 5.1 |
| Design Arena: 3D | 1392 | 1215 | Claude Fable 5.1 |
| Design Arena: all code categories | 1335 | 1260 | Claude Fable 5.1 |
| Design Arena: SVG | 1300 | 1179 | Claude Fable 5.1 |
| Design Arena: ASCII art | 1323 | 1140 | Claude Fable 5.1 |
| LiveBench design | 83.4% | Not measured | Only Claude Fable 5.1 measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index260
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | Leader |
|---|---|---|---|
| LiveBench data analysis | 80.3% | Not measured | Only Claude Fable 5.1 measured |
| Public Benefits Bench (Vals AI) | 74.9% | Not measured | Only Claude Fable 5.1 measured |
| SAGE (Vals AI) | 48.5% | 43.3% | Claude Fable 5.1 |
| MedScribe (Vals AI) | 91.3% | 72.2% | Claude Fable 5.1 |
| Vals Multimodal Index | Not measured | 52.8% | Only MiMo-V2.5 measured |
| IFBench | Not measured | 67.1% | Only MiMo-V2.5 measured |
| Long context reasoning (AA-LCR) | 85.3% | 73.0% | 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 | 1428 | Claude Fable 5.1 |
| LMArena Text: instruction following | 1518 | 1435 | Claude Fable 5.1 |
| LMArena Text: creative writing | 1509 | 1393 | Claude Fable 5.1 |
| LMArena Vision | 1319 | 1247 | Claude Fable 5.1 |
| LMArena Text: English | 1506 | 1447 | Claude Fable 5.1 |
| LMArena Text: non-English | 1508 | 1405 | Claude Fable 5.1 |
| LMArena Text: Chinese | 1584 | 1469 | Claude Fable 5.1 |
| LMArena Text: German | 1499 | 1421 | Claude Fable 5.1 |
| LMArena Text: Japanese | 1562 | 1306 | Claude Fable 5.1 |
| LMArena Text: Korean | 1517 | 1361 | Claude Fable 5.1 |
| LMArena Text: French | 1523 | 1448 | Claude Fable 5.1 |
| LMArena Text: Spanish | 1520 | 1414 | Claude Fable 5.1 |
| LMArena Text: Russian | 1520 | 1396 | Claude Fable 5.1 |
| LMArena Text: Polish | 1525 | 1413 | Claude Fable 5.1 |
| LMArena Text: multi-turn | 1493 | 1445 | Claude Fable 5.1 |
| LMArena Text: longer queries | 1524 | 1445 | Claude Fable 5.1 |
| LMArena Text: writing and language | 1510 | 1409 | Claude Fable 5.1 |
| LMArena Text: entertainment and media | 1497 | 1399 | Claude Fable 5.1 |
| LMArena Vision: English | 1313 | 1259 | Claude Fable 5.1 |
| LMArena Vision: Chinese | 1391 | 1326 | Claude Fable 5.1 |
| LMArena Vision: reading text | 1327 | 1256 | Claude Fable 5.1 |
| LMArena Vision: humor | 1318 | 1226 | Claude Fable 5.1 |
| LMArena Vision: recognizing things | Not measured | 1189 | Only MiMo-V2.5 measured |
| LMArena Vision: creative writing | 1330 | 1230 | Claude Fable 5.1 |
| Neither model has a result on the other 12 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Fable 5.1 | MiMo-V2.5 | 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-V2.5 costs less
Repository review
50K input + 3K output tokens
MiMo-V2.5 costs less
Agent loop
200K input + 10K output tokens
MiMo-V2.5 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-V2.5 |
|---|---|---|
| Maker | Anthropic | Xiaomi |
| Weights | No public weights listed | Open weights |
| Released | September 1, 2026 | April 22, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $10.00 | $0.168 |
| Output $/Mtok | $50.00 | $0.336 |
| Coding index | 84.2 | 50.0 |
| Independent measurements behind it | 5 | 3 |
| Cost per solved task | Not computable | $0.01 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Fable 5.1 better than MiMo-V2.5 for coding?
Pick Claude Fable 5.1 for coding: it scores 84.2 on the Vibe Coding Index against 50.0 for MiMo-V2.5. Pick MiMo-V2.5 for output tokens 148.8x cheaper ($0.336 vs $50.00 per million) and a larger context window (1.05M against 1M tokens).
Which is cheaper, Claude Fable 5.1 or MiMo-V2.5?
Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens; MiMo-V2.5 costs $0.168 and $0.336. Cost per solved task is known for MiMo-V2.5 only.
Which has the bigger context window, Claude Fable 5.1 or MiMo-V2.5?
MiMo-V2.5, with 1.05M tokens against 1M.
How many benchmarks is the Claude Fable 5.1 vs MiMo-V2.5 comparison based on?
73 benchmarks have a result for both models as of October 22, 2026. Claude Fable 5.1's coding index rests on 5 independent benchmarks and MiMo-V2.5's on 3. Where only one model has a result, the page says so instead of naming a winner.