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Claude Opus 5.5 vs MiMo-V2.6-Pro

Claude Opus 5.5 leads MiMo-V2.6-Pro on coding, 88.8 to 65.4 on the Vibe Coding Index, and MiMo-V2.6-Pro costs 23.0x less per output token ($0.87 vs $20.00 per million). Updated October 22, 2026; 73 benchmarks have a result for both.

Replace Claude Opus 5.5 Replace MiMo-V2.6-Pro
Claude Opus 5.5Anthropic
Coding
88.8
Overall
87.1
Output $/M
$20.00
70
MiMo-V2.6-ProXiaomi
Coding
65.4
Overall
68.4
Output $/M
$0.87
3
vs boards won of 73 shared

Claude Opus 5.5 or MiMo-V2.6-Pro: which to pick

Pick Claude Opus 5.5 for coding: it scores 88.8 on the Vibe Coding Index against 65.4 for MiMo-V2.6-Pro.

Pick MiMo-V2.6-Pro for output tokens 23.0x cheaper ($0.87 vs $20.00 per million) and a larger context window (1.05M against 1M tokens).

Model AClaude Opus 5.5Anthropic88.8/1005 independent benchmarksNo cost per solved taskModel BMiMo-V2.6-ProXiaomi65.4/1004 independent benchmarksNo cost per solved task
Shared results
73
Claude Opus 5.5 only
36
MiMo-V2.6-Pro only
0
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.

At a glance

Coding index
Claude Opus 5.5 88.8 from 5 benchmarks, MiMo-V2.6-Pro 65.4 from 4 benchmarks.
Widest category
Coding, 16.6 points apart on average over 17 shared benchmarks.
Widest single gap
IOI (Vals AI): Claude Opus 5.5 95.1% against MiMo-V2.6-Pro 39.3%, 55.7 points apart on a 0 to 100 scale.
Output price
Claude Opus 5.5 $20.00 against MiMo-V2.6-Pro $0.87 per million output tokens, 23.0x apart.
Context window
Claude Opus 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.

Boards won, where both have a result
CategoryClaude Opus 5.5BarsMiMo-V2.6-ProTies
Coding170
Intelligence10
Agentic work102
Reasoning80
Math30
Knowledge50
Web design70
General191
All shared boards703
CodingLike-for-likeSix of these boards feed the Vibe Coding Index170
Coding benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
LiveBench coding96.3%81.5%Claude Opus 5.5
LMArena WebDev18071625Claude Opus 5.5
Terminal-Bench 4 (Vals AI)65.2%31.3%Claude Opus 5.5
Vibe Code Bench (Vals AI)90.3%85.2%Claude Opus 5.5
Code migration (Vals AI)66.7%43.0%Claude Opus 5.5
ProgramBench (Vals AI)18.5%0.5%Claude Opus 5.5
IOI (Vals AI)95.1%39.3%Claude Opus 5.5
Terminal-Bench 2.1 (Vals AI)87.6%67.8%Claude Opus 5.5
SWE-bench Multimodal (Vals AI)70.2%41.3%Claude Opus 5.5
Vibe Code Bench 1-100 (Vals AI)30.4%Not measuredOnly Claude Opus 5.5 measured
CyberBench (Vals AI)74.6%72.9%Claude Opus 5.5
SciCode66.9%60.9%Claude Opus 5.5
FrontierCode54.6%Not measuredOnly Claude Opus 5.5 measured
FrontierSWE62.3%Not measuredOnly Claude Opus 5.5 measured
MirrorCode77.4%Not measuredOnly Claude Opus 5.5 measured
ALE-Bench2147.41158.1Claude Opus 5.5
LMArena Text: coding15451533Claude Opus 5.5
LMArena Text: software and IT15381528Claude Opus 5.5
LMArena WebDev: React18551639Claude Opus 5.5
LMArena WebDev: HTML17531616Claude Opus 5.5
LMArena WebDev: from an image17531598Claude Opus 5.5
SciCode18.5%Not measuredOnly Claude Opus 5.5 measured
Neither model has a result on the other 17 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
AA Intelligence Index57.646.3Claude Opus 5.5
Epoch Capabilities Index168.8Not measuredOnly Claude Opus 5.5 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index102
Agentic work benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
Design Arena: agents building web apps13161290Claude Opus 5.5
Design Arena: agents building mobile apps1308Not measuredOnly Claude Opus 5.5 measured
Design Arena: spreadsheets1368Not measuredOnly Claude Opus 5.5 measured
LiveBench research85.0%76.7%Claude Opus 5.5
LiveBench browser80.0%88.0%MiMo-V2.6-Pro
LiveBench long agentic85.0%47.5%Claude Opus 5.5
SREBench (Vals AI)33.6%3.0%Claude Opus 5.5
Finance Agent (Vals AI)58.6%57.3%Claude Opus 5.5
Tax Agent Bench (Vals AI)45.6%32.4%Claude Opus 5.5
Legal Research Bench (Vals AI)50.5%47.1%Claude Opus 5.5
Harvey's Legal Agent Benchmark (Vals AI)9.2%13.8%MiMo-V2.6-Pro
Excel Modeling Benchmark (Vals AI)75.9%62.9%Claude Opus 5.5
BioMysteryBench (Vals AI)79.3%Not measuredOnly Claude Opus 5.5 measured
Terminal-Bench-Science (Vals AI)47.1%2.9%Claude Opus 5.5
Vals Science Index58.7%Not measuredOnly Claude Opus 5.5 measured
Time Horizon Index (Vals AI)91.3%Not measuredOnly Claude Opus 5.5 measured
CUA-bench (Vals AI)14.0%Not measuredOnly Claude Opus 5.5 measured
Robo-bench (Vals AI)14.6%Not measuredOnly Claude Opus 5.5 measured
APEX-Agents73.5%54.4%Claude Opus 5.5
Remote Labor Index21.3%Not measuredOnly Claude Opus 5.5 measured
SpireClimb3.3%Not measuredOnly Claude Opus 5.5 measured
Vending-Bench 2$9,235Not measuredOnly Claude Opus 5.5 measured
LMArena Search1213Not measuredOnly Claude Opus 5.5 measured
Neither model has a result on the other 18 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index80
Reasoning benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
LiveBench reasoning92.2%79.6%Claude Opus 5.5
MysteryMechanism (Vals AI)49.5%15.3%Claude Opus 5.5
Humanity's Last Exam (Artificial Analysis run)61.4%49.4%Claude Opus 5.5
GPQA Diamond (Epoch AI run)90.6%Not measuredOnly Claude Opus 5.5 measured
ARC-AGI98.5%Not measuredOnly Claude Opus 5.5 measured
ARC-AGI-293.3%Not measuredOnly Claude Opus 5.5 measured
Chess puzzles67.0%Not measuredOnly Claude Opus 5.5 measured
Mystery game puzzles71.0%Not measuredOnly Claude Opus 5.5 measured
EBR-bench71.4%Not measuredOnly Claude Opus 5.5 measured
LMArena Text: hard prompts15361511Claude Opus 5.5
LMArena Text: expert15491541Claude Opus 5.5
LMArena Text: hard prompts in English15351520Claude Opus 5.5
LMArena Vision: diagrams13451281Claude Opus 5.5
LMArena Vision: homework13621264Claude Opus 5.5
Neither model has a result on the other 8 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
OTIS Mock AIME100.0%Not measuredOnly Claude Opus 5.5 measured
FrontierMath, tiers 1 to 391.2%Not measuredOnly Claude Opus 5.5 measured
FrontierMath, tier 495.0%Not measuredOnly Claude Opus 5.5 measured
ProofBench100.0%70.0%Claude Opus 5.5
LMArena Text: math15181500Claude Opus 5.5
LMArena Text: mathematical work15161511Claude Opus 5.5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
Knowledge benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
MedCode (Vals AI)49.8%45.0%Claude Opus 5.5
SimpleQA Verified72.2%Not measuredOnly Claude Opus 5.5 measured
LMArena Text: science15241506Claude Opus 5.5
LMArena Text: medicine and healthcare15091497Claude Opus 5.5
LMArena Text: legal and government15181485Claude Opus 5.5
LMArena Text: business and finance14941468Claude Opus 5.5
FACTS Benchmark Suite65.3%Not measuredOnly Claude Opus 5.5 measured
Neither model has a result on the other 11 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index70
Web design benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
Design Arena: websites13351308Claude Opus 5.5
Design Arena: UI components13851340Claude Opus 5.5
Design Arena: game dev14611314Claude Opus 5.5
Design Arena: data viz13971336Claude Opus 5.5
Design Arena: 3D14761330Claude Opus 5.5
Design Arena: all code categories13901317Claude Opus 5.5
Design Arena: SVG1329Not measuredOnly Claude Opus 5.5 measured
LiveBench design86.9%78.5%Claude Opus 5.5
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index191
General benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
Vals Index70.2%57.8%Claude Opus 5.5
LiveBench data analysis80.3%72.3%Claude Opus 5.5
Public Benefits Bench (Vals AI)70.6%68.9%Claude Opus 5.5
SAGE (Vals AI)45.8%45.0%Claude Opus 5.5
MedScribe (Vals AI)91.4%88.3%Claude Opus 5.5
Long context reasoning (AA-LCR)84.7%86.3%MiMo-V2.6-Pro
DTBench98.9%Not measuredOnly Claude Opus 5.5 measured
LMCA68.2%Not measuredOnly Claude Opus 5.5 measured
Furniture assembly83.3%Not measuredOnly Claude Opus 5.5 measured
LMArena Text15161491Claude Opus 5.5
LMArena Text: instruction following15371491Claude Opus 5.5
LMArena Text: creative writing15351466Claude Opus 5.5
LMArena Vision13211263Claude Opus 5.5
LMArena Text: English15191504Claude Opus 5.5
LMArena Text: non-English15071474Claude Opus 5.5
LMArena Text: Chinese15821529Claude Opus 5.5
LMArena Text: Japanese1534Not measuredOnly Claude Opus 5.5 measured
LMArena Text: French1493Not measuredOnly Claude Opus 5.5 measured
LMArena Text: Spanish1508Not measuredOnly Claude Opus 5.5 measured
LMArena Text: Russian15171479Claude Opus 5.5
LMArena Text: multi-turn15011466Claude Opus 5.5
LMArena Text: longer queries15321501Claude Opus 5.5
LMArena Text: writing and language15321470Claude Opus 5.5
LMArena Text: entertainment and media15151465Claude Opus 5.5
LMArena Vision: English13171268Claude Opus 5.5
LMArena Vision: reading text13261270Claude Opus 5.5
LMArena Vision: creative writing1320Not measuredOnly Claude Opus 5.5 measured
Neither model has a result on the other 19 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Opus 5.5 and MiMo-V2.6-Pro
BenchmarkClaude Opus 5.5MiMo-V2.6-ProLeader
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 Opus 5.5$0.014Fits in one request
MiMo-V2.6-Pro$0.0009Fits in one request

MiMo-V2.6-Pro costs less

Repository review

50K input + 3K output tokens

Claude Opus 5.5$0.260Fits in one request
MiMo-V2.6-Pro$0.024Fits in one request

MiMo-V2.6-Pro costs less

Agent loop

200K input + 10K output tokens

Claude Opus 5.5$1.00Fits in one request
MiMo-V2.6-Pro$0.096Fits in one request

MiMo-V2.6-Pro 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.

Specifications of Claude Opus 5.5 and MiMo-V2.6-Pro
SpecificationAnthropic Claude Opus 5.5Xiaomi MiMo-V2.6-Pro
MakerAnthropicXiaomi
WeightsNo public weights listedOpen weights
ReleasedSeptember 22, 2026September 21, 2026
Context window1M1.05M
Input $/Mtok$4.00$0.435
Output $/Mtok$20.00$0.87
Coding index88.865.4
Independent measurements behind it54
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 5.5 better than MiMo-V2.6-Pro for coding?

Pick Claude Opus 5.5 for coding: it scores 88.8 on the Vibe Coding Index against 65.4 for MiMo-V2.6-Pro. Pick MiMo-V2.6-Pro for output tokens 23.0x cheaper ($0.87 vs $20.00 per million) and a larger context window (1.05M against 1M tokens).

Which is cheaper, Claude Opus 5.5 or MiMo-V2.6-Pro?

Claude Opus 5.5 costs $4.00 per million input tokens and $20.00 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 Opus 5.5 or MiMo-V2.6-Pro?

MiMo-V2.6-Pro, with 1.05M tokens against 1M.

How many benchmarks is the Claude Opus 5.5 vs MiMo-V2.6-Pro comparison based on?

73 benchmarks have a result for both models as of October 22, 2026. Claude Opus 5.5's coding index rests on 5 independent benchmarks and MiMo-V2.6-Pro's on 4. Where only one model has a result, the page says so instead of naming a winner.

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