Claude Haiku 5.5 vs MiMo-V2.6-Pro
Updated October 21, 2026. 42 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 Haiku 5.5 for coding: it scores 75.9 on the Vibe Coding Index against 72.6 for MiMo-V2.6-Pro.
Pick MiMo-V2.6-Pro when the context window is larger, 1.05M against 1M tokens, or when what matters is LMArena WebDev or SciCode, where it leads.
- Shared results
- 42
- Claude Haiku 5.5 only
- 20
- MiMo-V2.6-Pro only
- 31
- Like-for-like categories
- 8 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 Haiku 5.5
Claude Haiku 5.5 scores 75.9 against 72.6.
2 benchmarks behind each score
Intelligence
AA Intelligence Index
MiMo-V2.6-Pro
MiMo-V2.6-Pro leads, 46.3 against 43.4.
Same board, both measured
Web design
Design Arena: websites
MiMo-V2.6-Pro
MiMo-V2.6-Pro leads, 1308 against 1263.
Same board, both measured
General
Vals Index
Claude Haiku 5.5
Claude Haiku 5.5 leads, 58.7% against 57.8%.
Same board, both measured
Long documents
Listed context window
MiMo-V2.6-Pro
MiMo-V2.6-Pro takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Claude Haiku 5.5
Claude Haiku 5.5 $0.0003, MiMo-V2.6-Pro $0.0009 per turn.
List prices
At a glance
- Coding index
- Claude Haiku 5.5 75.9 from 2 benchmarks, MiMo-V2.6-Pro 72.6 from 2 benchmarks.
- Widest category
- Math, 19.0 points apart on average over 1 shared benchmark.
- Widest single gap
- MysteryMechanism (Vals AI): Claude Haiku 5.5 35.1% against MiMo-V2.6-Pro 15.3%, 19.8 points apart on a 0 to 100 scale.
- Output price
- Claude Haiku 5.5 $0.50 against MiMo-V2.6-Pro $0.87 per million output tokens, 1.7x apart.
- Context window
- Claude Haiku 5.5 takes 1M tokens, MiMo-V2.6-Pro 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 Haiku 5.5 | Bars | MiMo-V2.6-Pro | Ties |
|---|---|---|---|---|
| Coding | 8 | 4 | ||
| Intelligence | 0 | 1 | ||
| Agentic work | 5 | 6 | ||
| Reasoning | 2 | 1 | ||
| Math | 1 | 0 | ||
| Knowledge | 1 | 0 | ||
| Web design | 3 | 4 | ||
| General | 3 | 3 | ||
| All shared boards | 23 | 19 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index84
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| LiveBench coding | 91.4% | 81.5% | Claude Haiku 5.5 |
| LMArena WebDev | 1586 | 1625 | MiMo-V2.6-Pro |
| Terminal-Bench 4 (Vals AI) | 36.4% | 31.3% | Claude Haiku 5.5 |
| Vibe Code Bench (Vals AI) | 90.4% | 85.2% | Claude Haiku 5.5 |
| Code migration (Vals AI) | 44.6% | 43.0% | Claude Haiku 5.5 |
| ProgramBench (Vals AI) | 2.5% | 0.5% | Claude Haiku 5.5 |
| IOI (Vals AI) | 47.3% | 39.3% | Claude Haiku 5.5 |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 67.8% | Only MiMo-V2.6-Pro measured |
| SWE-bench Multimodal (Vals AI) | 44.0% | 41.3% | Claude Haiku 5.5 |
| Vibe Code Bench 1-100 (Vals AI) | 20.4% | Not measured | Only Claude Haiku 5.5 measured |
| CyberBench (Vals AI) | 75.5% | 72.9% | Claude Haiku 5.5 |
| SciCode | 55.0% | 60.9% | MiMo-V2.6-Pro |
| FrontierCode | 46.4% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierSWE | 43.8% | Not measured | Only Claude Haiku 5.5 measured |
| ALE-Bench | Not measured | 1158.1 | Only MiMo-V2.6-Pro measured |
| LMArena Text: coding | Not measured | 1533 | Only MiMo-V2.6-Pro measured |
| LMArena Text: software and IT | Not measured | 1528 | Only MiMo-V2.6-Pro measured |
| LMArena WebDev: React | 1605 | 1639 | MiMo-V2.6-Pro |
| LMArena WebDev: HTML | 1569 | 1616 | MiMo-V2.6-Pro |
| LMArena WebDev: from an image | Not measured | 1598 | Only MiMo-V2.6-Pro measured |
| Neither model has a result on the other 18 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| AA Intelligence Index | 43.4 | 46.3 | MiMo-V2.6-Pro |
| Epoch Capabilities Index | 159.3 | Not measured | Only Claude Haiku 5.5 measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index56
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| Design Arena: agents building web apps | Not measured | 1291 | Only MiMo-V2.6-Pro measured |
| LiveBench research | 81.9% | 76.7% | Claude Haiku 5.5 |
| LiveBench browser | 80.0% | 88.0% | MiMo-V2.6-Pro |
| LiveBench long agentic | 57.6% | 47.5% | Claude Haiku 5.5 |
| SREBench (Vals AI) | 5.7% | 3.0% | Claude Haiku 5.5 |
| Finance Agent (Vals AI) | 54.1% | 57.3% | MiMo-V2.6-Pro |
| Tax Agent Bench (Vals AI) | 31.9% | 32.4% | MiMo-V2.6-Pro |
| Legal Research Bench (Vals AI) | 43.3% | 47.1% | MiMo-V2.6-Pro |
| Harvey's Legal Agent Benchmark (Vals AI) | 4.2% | 13.8% | MiMo-V2.6-Pro |
| Excel Modeling Benchmark (Vals AI) | 59.0% | 62.9% | MiMo-V2.6-Pro |
| BioMysteryBench (Vals AI) | 70.4% | Not measured | Only Claude Haiku 5.5 measured |
| Terminal-Bench-Science (Vals AI) | 10.0% | 2.9% | Claude Haiku 5.5 |
| Vals Science Index | 38.5% | Not measured | Only Claude Haiku 5.5 measured |
| APEX-Agents | 56.1% | 54.4% | Claude Haiku 5.5 |
| Vending-Bench 2 | $3,602 | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 24 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index21
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| LiveBench reasoning | 82.4% | 79.6% | Claude Haiku 5.5 |
| MysteryMechanism (Vals AI) | 35.1% | 15.3% | Claude Haiku 5.5 |
| Humanity's Last Exam (Artificial Analysis run) | 44.4% | 49.4% | MiMo-V2.6-Pro |
| GPQA Diamond (Epoch AI run) | 89.6% | Not measured | Only Claude Haiku 5.5 measured |
| ARC-AGI | 89.0% | Not measured | Only Claude Haiku 5.5 measured |
| ARC-AGI-2 | 61.3% | Not measured | Only Claude Haiku 5.5 measured |
| Chess puzzles | 55.0% | Not measured | Only Claude Haiku 5.5 measured |
| Mystery game puzzles | 30.0% | Not measured | Only Claude Haiku 5.5 measured |
| EBR-bench | 43.8% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: hard prompts | Not measured | 1511 | Only MiMo-V2.6-Pro measured |
| LMArena Text: expert | Not measured | 1541 | Only MiMo-V2.6-Pro measured |
| LMArena Text: hard prompts in English | Not measured | 1520 | Only MiMo-V2.6-Pro measured |
| LMArena Vision: diagrams | Not measured | 1281 | Only MiMo-V2.6-Pro measured |
| LMArena Vision: homework | Not measured | 1264 | Only MiMo-V2.6-Pro measured |
| Neither model has a result on the other 7 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| OTIS Mock AIME | 98.9% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierMath, tiers 1 to 3 | 75.1% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierMath, tier 4 | 46.3% | Not measured | Only Claude Haiku 5.5 measured |
| ProofBench | 89.0% | 70.0% | Claude Haiku 5.5 |
| LMArena Text: math | Not measured | 1500 | Only MiMo-V2.6-Pro measured |
| LMArena Text: mathematical work | Not measured | 1511 | Only MiMo-V2.6-Pro measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| MedCode (Vals AI) | 51.5% | 45.0% | Claude Haiku 5.5 |
| SimpleQA Verified | 23.8% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: science | Not measured | 1506 | Only MiMo-V2.6-Pro measured |
| LMArena Text: medicine and healthcare | Not measured | 1497 | Only MiMo-V2.6-Pro measured |
| LMArena Text: legal and government | Not measured | 1485 | Only MiMo-V2.6-Pro measured |
| LMArena Text: business and finance | Not measured | 1468 | Only MiMo-V2.6-Pro measured |
| Neither model has a result on the other 11 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index34
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| Design Arena: websites | 1263 | 1308 | MiMo-V2.6-Pro |
| Design Arena: UI components | 1295 | 1338 | MiMo-V2.6-Pro |
| Design Arena: game dev | 1315 | 1314 | Claude Haiku 5.5 |
| Design Arena: data viz | 1292 | 1337 | MiMo-V2.6-Pro |
| Design Arena: 3D | 1343 | 1330 | Claude Haiku 5.5 |
| Design Arena: all code categories | 1279 | 1317 | MiMo-V2.6-Pro |
| LiveBench design | 83.1% | 78.5% | Claude Haiku 5.5 |
| Neither model has a result on the other 2 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index33
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| Vals Index | 58.7% | 57.8% | Claude Haiku 5.5 |
| LiveBench data analysis | 53.1% | 72.3% | MiMo-V2.6-Pro |
| Public Benefits Bench (Vals AI) | 63.2% | 68.9% | MiMo-V2.6-Pro |
| SAGE (Vals AI) | 45.8% | 45.0% | Claude Haiku 5.5 |
| MedScribe (Vals AI) | 89.5% | 88.3% | Claude Haiku 5.5 |
| Long context reasoning (AA-LCR) | 82.7% | 86.3% | MiMo-V2.6-Pro |
| DTBench | 95.0% | Not measured | Only Claude Haiku 5.5 measured |
| LMCA | 51.1% | Not measured | Only Claude Haiku 5.5 measured |
| Furniture assembly | 47.5% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text | Not measured | 1491 | Only MiMo-V2.6-Pro measured |
| LMArena Text: instruction following | Not measured | 1491 | Only MiMo-V2.6-Pro measured |
| LMArena Text: creative writing | Not measured | 1466 | Only MiMo-V2.6-Pro measured |
| LMArena Vision | Not measured | 1263 | Only MiMo-V2.6-Pro measured |
| LMArena Text: English | Not measured | 1504 | Only MiMo-V2.6-Pro measured |
| LMArena Text: non-English | Not measured | 1474 | Only MiMo-V2.6-Pro measured |
| LMArena Text: Chinese | Not measured | 1529 | Only MiMo-V2.6-Pro measured |
| LMArena Text: Russian | Not measured | 1479 | Only MiMo-V2.6-Pro measured |
| LMArena Text: multi-turn | Not measured | 1466 | Only MiMo-V2.6-Pro measured |
| LMArena Text: longer queries | Not measured | 1501 | Only MiMo-V2.6-Pro measured |
| LMArena Text: writing and language | Not measured | 1470 | Only MiMo-V2.6-Pro measured |
| LMArena Text: entertainment and media | Not measured | 1465 | Only MiMo-V2.6-Pro measured |
| LMArena Vision: English | Not measured | 1268 | Only MiMo-V2.6-Pro measured |
| LMArena Vision: reading text | Not measured | 1270 | Only MiMo-V2.6-Pro measured |
| Neither model has a result on the other 23 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Haiku 5.5 | MiMo-V2.6-Pro | 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
Claude Haiku 5.5 costs less
Repository review
50K input + 3K output tokens
Claude Haiku 5.5 costs less
Agent loop
200K input + 10K output tokens
Claude Haiku 5.5 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 Haiku 5.5 | Xiaomi MiMo-V2.6-Pro |
|---|---|---|
| Maker | Anthropic | Xiaomi |
| Weights | No public weights listed | Open weights |
| Released | October 7, 2026 | September 21, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $0.10 | $0.435 |
| Output $/Mtok | $0.50 | $0.87 |
| Coding index | 75.9 | 72.6 |
| Independent measurements behind it | 2 | 2 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Haiku 5.5 better than MiMo-V2.6-Pro for coding?
Pick Claude Haiku 5.5 for coding: it scores 75.9 on the Vibe Coding Index against 72.6 for MiMo-V2.6-Pro. Pick MiMo-V2.6-Pro when the context window is larger, 1.05M against 1M tokens, or when what matters is LMArena WebDev or SciCode, where it leads.
Which is cheaper, Claude Haiku 5.5 or MiMo-V2.6-Pro?
Claude Haiku 5.5 costs $0.10 per million input tokens and $0.50 per million output tokens; MiMo-V2.6-Pro costs $0.435 and $0.87. Cost per solved task is known for neither of them.
Which has the bigger context window, Claude Haiku 5.5 or MiMo-V2.6-Pro?
MiMo-V2.6-Pro, with 1.05M tokens against 1M.
How many benchmarks is the Claude Haiku 5.5 vs MiMo-V2.6-Pro comparison based on?
42 benchmarks have a result for both models as of October 21, 2026. Claude Haiku 5.5's coding index rests on 2 independent benchmarks and MiMo-V2.6-Pro's on 2. Where only one model has a result, the page says so instead of naming a winner.