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Claude Sonnet 4.5 vs MiMo-V2.5

MiMo-V2.5 leads Claude Sonnet 4.5 on coding, 50.0 to 39.5 on the Vibe Coding Index, and MiMo-V2.5 costs 44.6x less per output token ($0.336 vs $15.00 per million). Updated October 22, 2026; 56 benchmarks have a result for both.

Replace Claude Sonnet 4.5 Replace MiMo-V2.5
Claude Sonnet 4.5Anthropic
Coding
39.5
Overall
49.5
Output $/M
$15.00
37
MiMo-V2.5Xiaomi
Coding
50.0
Overall
50.7
Output $/M
$0.336
18
vs boards won of 56 shared, 1 tied

Claude Sonnet 4.5 or MiMo-V2.5: which to pick

Pick MiMo-V2.5 for coding: it scores 50.0 on the Vibe Coding Index against 39.5 for Claude Sonnet 4.5.

Pick Claude Sonnet 4.5 for work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Model AClaude Sonnet 4.5Anthropic39.5/1003 independent benchmarks$1.16 per solved taskModel BMiMo-V2.5Xiaomi50.0/1003 independent benchmarks$0.01 per solved task
Shared results
56
Claude Sonnet 4.5 only
39
MiMo-V2.5 only
24
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 Sonnet 4.5 39.5 from 3 benchmarks, MiMo-V2.5 50.0 from 3 benchmarks.
Widest category
Web design, 9.3 points apart on average over 8 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Claude Sonnet 4.5 22.6% against MiMo-V2.5 42.2%, 19.6 points apart on a 0 to 100 scale.
Output price
Claude Sonnet 4.5 $15.00 against MiMo-V2.5 $0.336 per million output tokens, 44.6x apart.
Context window
Claude Sonnet 4.5 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.

Boards won, where both have a result
CategoryClaude Sonnet 4.5BarsMiMo-V2.5Ties
Coding27
Intelligence01
Agentic work001 tie
Reasoning41
Math30
Knowledge100
Web design17
General172
All shared boards37181 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index27
Coding benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
SWE-bench Verified74.8%Not measuredOnly Claude Sonnet 4.5 measured
SWE-bench Multilingual67.0%Not measuredOnly Claude Sonnet 4.5 measured
LMArena WebDev13941438MiMo-V2.5
AA Coding Index52.156.8MiMo-V2.5
LiveCodeBench (Vals AI)73.0%81.5%MiMo-V2.5
SWE-bench Verified (Vals AI)70.0%71.0%MiMo-V2.5
Vibe Code Bench (Vals AI)22.6%42.2%MiMo-V2.5
Code migration (Vals AI)Not measured14.2%Only MiMo-V2.5 measured
Terminal-Bench 2.1 (Vals AI)Not measured60.7%Only MiMo-V2.5 measured
SciCodeNot measured43.9%Only MiMo-V2.5 measured
Terminal-Bench Hard (Artificial Analysis run)Not measured41.7%Only MiMo-V2.5 measured
Terminal-Bench46.5%Not measuredOnly Claude Sonnet 4.5 measured
GSO-Bench14.7%Not measuredOnly Claude Sonnet 4.5 measured
WeirdML47.7%Not measuredOnly Claude Sonnet 4.5 measured
Cybench60.0%Not measuredOnly Claude Sonnet 4.5 measured
ALE-BenchNot measured514.0Only MiMo-V2.5 measured
LMArena Text: coding14881469Claude Sonnet 4.5
LMArena Text: software and IT14731463Claude Sonnet 4.5
LMArena WebDev: React13861425MiMo-V2.5
LMArena WebDev: HTML13991429MiMo-V2.5
Neither model has a result on the other 19 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
AA Intelligence Index20.721.8MiMo-V2.5
Epoch Capabilities Index146.7Not measuredOnly Claude Sonnet 4.5 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index00
Agentic work benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
AA Agentic Index15.815.8Tie
Design Arena: agents building web apps1060Not measuredOnly Claude Sonnet 4.5 measured
Design Arena: agents building full-stack apps1050Not measuredOnly Claude Sonnet 4.5 measured
Design Arena: agents building mobile apps1137Not measuredOnly Claude Sonnet 4.5 measured
Finance Agent (Vals AI)Not measured36.7%Only MiMo-V2.5 measured
Tax Agent Bench (Vals AI)Not measured7.8%Only MiMo-V2.5 measured
Legal Research Bench (Vals AI)Not measured9.1%Only MiMo-V2.5 measured
Excel Modeling Benchmark (Vals AI)Not measured55.1%Only MiMo-V2.5 measured
τ²-Bench TelecomNot measured90.6%Only MiMo-V2.5 measured
METR time horizons67.4%Not measuredOnly Claude Sonnet 4.5 measured
Remote Labor Index2.1%Not measuredOnly Claude Sonnet 4.5 measured
GDPval42.5%Not measuredOnly Claude Sonnet 4.5 measured
DeepResearch Bench52.6%Not measuredOnly Claude Sonnet 4.5 measured
OSWorld62.9%Not measuredOnly Claude Sonnet 4.5 measured
Vending-Bench 2$3,839Not measuredOnly Claude Sonnet 4.5 measured
Berkeley Function Calling Leaderboard (BFCL)73.2%Not measuredOnly Claude Sonnet 4.5 measured
Neither model has a result on the other 25 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index41
Reasoning benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
GPQA Diamond81.6%81.6%Claude Sonnet 4.5
MMMU Pro (Vals AI)79.3%80.0%MiMo-V2.5
GPQA Diamond (Artificial Analysis run)Not measured84.9%Only MiMo-V2.5 measured
Humanity's Last Exam (Artificial Analysis run)Not measured27.2%Only MiMo-V2.5 measured
GPQA Diamond (Epoch AI run)82.3%Not measuredOnly Claude Sonnet 4.5 measured
ARC-AGI63.7%Not measuredOnly Claude Sonnet 4.5 measured
ARC-AGI-213.6%Not measuredOnly Claude Sonnet 4.5 measured
SimpleBench54.3%Not measuredOnly Claude Sonnet 4.5 measured
Chess puzzles10.0%Not measuredOnly Claude Sonnet 4.5 measured
Mystery game puzzles17.0%Not measuredOnly Claude Sonnet 4.5 measured
EBR-bench2.4%Not measuredOnly Claude Sonnet 4.5 measured
VPCT39.8%Not measuredOnly Claude Sonnet 4.5 measured
LMArena Text: hard prompts14621450Claude Sonnet 4.5
LMArena Text: expert14831459Claude Sonnet 4.5
LMArena Text: hard prompts in English14711461Claude Sonnet 4.5
LMArena Vision: diagramsNot measured1269Only MiMo-V2.5 measured
LMArena Vision: homeworkNot measured1262Only MiMo-V2.5 measured
Kagi LLM Benchmark57.9%Not measuredOnly Claude Sonnet 4.5 measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
AIME88.2%Not measuredOnly Claude Sonnet 4.5 measured
MGSM (Vals AI)94.3%Not measuredOnly Claude Sonnet 4.5 measured
OTIS Mock AIME77.8%Not measuredOnly Claude Sonnet 4.5 measured
FrontierMath, tiers 1 to 323.9%Not measuredOnly Claude Sonnet 4.5 measured
FrontierMath, tier 42.4%Not measuredOnly Claude Sonnet 4.5 measured
ProofBench19.0%16.0%Claude Sonnet 4.5
MATH level 597.7%Not measuredOnly Claude Sonnet 4.5 measured
LMArena Text: math14491436Claude Sonnet 4.5
LMArena Text: mathematical work14621451Claude Sonnet 4.5
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index100
Knowledge benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
MMLU Pro87.4%82.9%Claude Sonnet 4.5
LegalBench (Vals AI)84.1%78.9%Claude Sonnet 4.5
CaseLaw (Vals AI)62.2%Not measuredOnly Claude Sonnet 4.5 measured
CorpFin (Vals AI)62.0%59.9%Claude Sonnet 4.5
TaxEval (Vals AI)73.3%71.8%Claude Sonnet 4.5
MortgageTax (Vals AI)64.0%59.3%Claude Sonnet 4.5
MedQA (Vals AI)94.7%Not measuredOnly Claude Sonnet 4.5 measured
MedCode (Vals AI)44.1%31.9%Claude Sonnet 4.5
SimpleQA Verified30.7%Not measuredOnly Claude Sonnet 4.5 measured
LMArena Text: science14481440Claude Sonnet 4.5
LMArena Text: medicine and healthcare14441432Claude Sonnet 4.5
LMArena Text: legal and government14511425Claude Sonnet 4.5
LMArena Text: business and finance14401432Claude Sonnet 4.5
FACTS Benchmark Suite40.6%Not measuredOnly Claude Sonnet 4.5 measured
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index17
Web design benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
Design Arena: websites11891265MiMo-V2.5
Design Arena: UI components11701255MiMo-V2.5
Design Arena: game dev11661249MiMo-V2.5
Design Arena: data viz11671250MiMo-V2.5
Design Arena: 3D11571215MiMo-V2.5
Design Arena: all code categories11821260MiMo-V2.5
Design Arena: SVG11151179MiMo-V2.5
Design Arena: ASCII art12051140Claude Sonnet 4.5
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index172
General benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
SAGE (Vals AI)36.1%43.3%MiMo-V2.5
MedScribe (Vals AI)84.5%72.2%Claude Sonnet 4.5
Vals Multimodal IndexNot measured52.8%Only MiMo-V2.5 measured
IFBenchNot measured67.1%Only MiMo-V2.5 measured
Long context reasoning (AA-LCR)Not measured73.0%Only MiMo-V2.5 measured
DTBench83.2%Not measuredOnly Claude Sonnet 4.5 measured
LMCA38.8%Not measuredOnly Claude Sonnet 4.5 measured
LMArena Text14381428Claude Sonnet 4.5
LMArena Text: instruction following14591435Claude Sonnet 4.5
LMArena Text: creative writing14421393Claude Sonnet 4.5
LMArena VisionNot measured1247Only MiMo-V2.5 measured
LMArena Text: English14501447Claude Sonnet 4.5
LMArena Text: non-English14251405Claude Sonnet 4.5
LMArena Text: Chinese14601469MiMo-V2.5
LMArena Text: German14271421Claude Sonnet 4.5
LMArena Text: Japanese13901306Claude Sonnet 4.5
LMArena Text: Korean14021361Claude Sonnet 4.5
LMArena Text: French14591448Claude Sonnet 4.5
LMArena Text: Spanish14581414Claude Sonnet 4.5
LMArena Text: Russian14371396Claude Sonnet 4.5
LMArena Text: Polish14231413Claude Sonnet 4.5
LMArena Text: multi-turn14651445Claude Sonnet 4.5
LMArena Text: longer queries14751445Claude Sonnet 4.5
LMArena Text: writing and language14421409Claude Sonnet 4.5
LMArena Text: entertainment and media14281399Claude Sonnet 4.5
LMArena Vision: EnglishNot measured1259Only MiMo-V2.5 measured
LMArena Vision: ChineseNot measured1326Only MiMo-V2.5 measured
LMArena Vision: reading textNot measured1256Only MiMo-V2.5 measured
LMArena Vision: humorNot measured1226Only MiMo-V2.5 measured
LMArena Vision: recognizing thingsNot measured1189Only MiMo-V2.5 measured
LMArena Vision: creative writingNot measured1230Only MiMo-V2.5 measured
LMArena Document1450Not measuredOnly Claude Sonnet 4.5 measured
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
Image generation benchmarks for Claude Sonnet 4.5 and MiMo-V2.5
BenchmarkClaude Sonnet 4.5MiMo-V2.5Leader
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 Sonnet 4.5$0.011Fits in one request
MiMo-V2.5$0.0003Fits in one request

MiMo-V2.5 costs less

Repository review

50K input + 3K output tokens

Claude Sonnet 4.5$0.195Fits in one request
MiMo-V2.5$0.0094Fits in one request

MiMo-V2.5 costs less

Agent loop

200K input + 10K output tokens

Claude Sonnet 4.5$0.750Fits in one request
MiMo-V2.5$0.037Fits in one request

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.

Specifications of Claude Sonnet 4.5 and MiMo-V2.5
SpecificationAnthropic Claude Sonnet 4.5Xiaomi MiMo-V2.5
MakerAnthropicXiaomi
WeightsNo public weights listedOpen weights
ReleasedSeptember 29, 2025April 22, 2026
Context window1M1.05M
Input $/Mtok$3.00$0.168
Output $/Mtok$15.00$0.336
Coding index39.550.0
Independent measurements behind it33
Cost per solved task$1.16$0.01
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Sonnet 4.5 better than MiMo-V2.5 for coding?

Pick MiMo-V2.5 for coding: it scores 50.0 on the Vibe Coding Index against 39.5 for Claude Sonnet 4.5. Pick Claude Sonnet 4.5 for work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Which is cheaper, Claude Sonnet 4.5 or MiMo-V2.5?

Claude Sonnet 4.5 costs $3.00 per million input tokens and $15.00 per million output tokens; MiMo-V2.5 costs $0.168 and $0.336. Per solved SWE-bench Verified task, Claude Sonnet 4.5 costs $1.16 and MiMo-V2.5 $0.01.

Which has the bigger context window, Claude Sonnet 4.5 or MiMo-V2.5?

MiMo-V2.5, with 1.05M tokens against 1M.

How many benchmarks is the Claude Sonnet 4.5 vs MiMo-V2.5 comparison based on?

56 benchmarks have a result for both models as of October 22, 2026. Claude Sonnet 4.5's coding index rests on 3 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.

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<iframe src="https://llmbenchmark.ai/embed/compare/claude-sonnet-4-5-vs-xiaomi-mimo-v2-5" title="Claude Sonnet 4.5 vs MiMo-V2.5, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/claude-sonnet-4-5-vs-xiaomi-mimo-v2-5">LLMBenchmark.ai, Claude Sonnet 4.5 vs MiMo-V2.5</a></p>