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GPT-5 Mini vs MiMo-V2.5

MiMo-V2.5 leads GPT-5 Mini on coding, 50.0 to 34.2 on the Vibe Coding Index, and MiMo-V2.5 costs 6.0x less per output token ($0.336 vs $2.00 per million). Updated October 21, 2026; 67 benchmarks have a result for both.

Replace GPT-5 Mini Replace MiMo-V2.5
GPT-5 MiniOpenAI
Coding
34.2
Overall
43.7
Output $/M
$2.00
10
MiMo-V2.5Xiaomi
Coding
50.0
Overall
50.7
Output $/M
$0.336
57
vs boards won of 67 shared

GPT-5 Mini or MiMo-V2.5: which to pick

Pick MiMo-V2.5 for coding: it scores 50.0 on the Vibe Coding Index against 34.2 for GPT-5 Mini.

Pick GPT-5 Mini for work measured by LiveCodeBench (Vals AI) or LegalBench (Vals AI), where it leads.

Model AGPT-5 MiniOpenAI34.2/1002 independent benchmarks$0.08 per solved taskModel BMiMo-V2.5Xiaomi50.0/1003 independent benchmarks$0.01 per solved task
Shared results
67
GPT-5 Mini only
34
MiMo-V2.5 only
13
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
GPT-5 Mini 34.2 from 2 benchmarks, MiMo-V2.5 50.0 from 3 benchmarks.
Widest category
Agentic work, 19.6 points apart on average over 1 shared benchmark.
Widest single gap
Vibe Code Bench (Vals AI): GPT-5 Mini 14.2% against MiMo-V2.5 42.2%, 28.0 points apart on a 0 to 100 scale.
Output price
GPT-5 Mini $2.00 against MiMo-V2.5 $0.336 per million output tokens, 6.0x apart.
Context window
GPT-5 Mini takes 400K 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
CategoryGPT-5 MiniBarsMiMo-V2.5Ties
Coding16
Intelligence01
Agentic work01
Reasoning09
Math03
Knowledge55
Web design08
General424
All shared boards1057
CodingLike-for-likeSix of these boards feed the Vibe Coding Index16
Coding benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-V2.5Leader
SWE-bench Verified59.8%Not measuredOnly GPT-5 Mini measured
SWE-bench Multilingual39.7%Not measuredOnly GPT-5 Mini measured
LMArena WebDevNot measured1438Only MiMo-V2.5 measured
AA Coding IndexNot measured56.8Only MiMo-V2.5 measured
LiveCodeBench (Vals AI)86.6%81.5%GPT-5 Mini
SWE-bench Verified (Vals AI)60.8%71.0%MiMo-V2.5
Vibe Code Bench (Vals AI)14.2%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
LiveCodeBench (Artificial Analysis run)83.8%Not measuredOnly GPT-5 Mini measured
SciCode39.0%43.9%MiMo-V2.5
Terminal-Bench Hard (Artificial Analysis run)33.3%41.7%MiMo-V2.5
Terminal-Bench34.8%Not measuredOnly GPT-5 Mini measured
WeirdML52.7%Not measuredOnly GPT-5 Mini measured
ALE-BenchNot measured514.0Only MiMo-V2.5 measured
LMArena Text: coding14061469MiMo-V2.5
LMArena Text: software and IT13941463MiMo-V2.5
LMArena WebDev: ReactNot measured1425Only MiMo-V2.5 measured
LMArena WebDev: HTMLNot measured1429Only MiMo-V2.5 measured
Neither model has a result on the other 20 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-V2.5Leader
AA Intelligence Index20.621.8MiMo-V2.5
Epoch Capabilities Index145.3Not measuredOnly GPT-5 Mini measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-V2.5Leader
AA Agentic IndexNot measured15.8Only MiMo-V2.5 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 Telecom71.1%90.6%MiMo-V2.5
Vending-Bench 2-$31Not measuredOnly GPT-5 Mini measured
Berkeley Function Calling Leaderboard (BFCL)55.5%Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 33 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index09
Reasoning benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-V2.5Leader
GPQA Diamond80.3%81.6%MiMo-V2.5
MMMU Pro (Vals AI)78.9%80.0%MiMo-V2.5
GPQA Diamond (Artificial Analysis run)82.8%84.9%MiMo-V2.5
Humanity's Last Exam (Artificial Analysis run)21.5%27.2%MiMo-V2.5
GPQA Diamond (Epoch AI run)75.0%Not measuredOnly GPT-5 Mini measured
ARC-AGI54.3%Not measuredOnly GPT-5 Mini measured
ARC-AGI-24.4%Not measuredOnly GPT-5 Mini measured
Chess puzzles24.0%Not measuredOnly GPT-5 Mini measured
Mystery game puzzles10.0%Not measuredOnly GPT-5 Mini measured
VPCT40.2%Not measuredOnly GPT-5 Mini measured
LMArena Text: hard prompts13801450MiMo-V2.5
LMArena Text: expert13791459MiMo-V2.5
LMArena Text: hard prompts in English13831461MiMo-V2.5
LMArena Vision: diagrams12021269MiMo-V2.5
LMArena Vision: homework12101262MiMo-V2.5
Kagi LLM Benchmark70.3%Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index03
Math benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-V2.5Leader
AIME91.5%Not measuredOnly GPT-5 Mini measured
MATH 500 (Vals AI)94.8%Not measuredOnly GPT-5 Mini measured
MGSM (Vals AI)92.6%Not measuredOnly GPT-5 Mini measured
AA Math Index90.7Not measuredOnly GPT-5 Mini measured
AIME 2025 (Artificial Analysis run)90.7%Not measuredOnly GPT-5 Mini measured
OTIS Mock AIME86.7%Not measuredOnly GPT-5 Mini measured
FrontierMath, tiers 1 to 346.7%Not measuredOnly GPT-5 Mini measured
FrontierMath, tier 412.2%Not measuredOnly GPT-5 Mini measured
ProofBench9.0%16.0%MiMo-V2.5
MATH level 597.8%Not measuredOnly GPT-5 Mini measured
LMArena Text: math13781436MiMo-V2.5
LMArena Text: mathematical work13801451MiMo-V2.5
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index55
Knowledge benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-V2.5Leader
MMLU Pro82.2%82.9%MiMo-V2.5
LegalBench (Vals AI)81.8%78.9%GPT-5 Mini
CaseLaw (Vals AI)68.5%Not measuredOnly GPT-5 Mini measured
CorpFin (Vals AI)60.2%59.9%GPT-5 Mini
TaxEval (Vals AI)75.2%71.8%GPT-5 Mini
MortgageTax (Vals AI)66.9%59.3%GPT-5 Mini
MedQA (Vals AI)96.1%Not measuredOnly GPT-5 Mini measured
MedCode (Vals AI)43.0%31.9%GPT-5 Mini
MMLU Pro (Artificial Analysis run)83.7%Not measuredOnly GPT-5 Mini measured
SimpleQA Verified21.6%Not measuredOnly GPT-5 Mini measured
LMArena Text: science13711440MiMo-V2.5
LMArena Text: medicine and healthcare13801432MiMo-V2.5
LMArena Text: legal and government13751425MiMo-V2.5
LMArena Text: business and finance13581432MiMo-V2.5
FACTS Benchmark Suite38.6%Not measuredOnly GPT-5 Mini measured
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index08
Web design benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-V2.5Leader
Design Arena: websites11251266MiMo-V2.5
Design Arena: UI components11061258MiMo-V2.5
Design Arena: game dev11301249MiMo-V2.5
Design Arena: data viz11301249MiMo-V2.5
Design Arena: 3D10371216MiMo-V2.5
Design Arena: all code categories11151260MiMo-V2.5
Design Arena: SVG10911178MiMo-V2.5
Design Arena: ASCII art11251140MiMo-V2.5
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index424
General benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-V2.5Leader
SAGE (Vals AI)43.0%43.3%MiMo-V2.5
MedScribe (Vals AI)80.6%72.2%GPT-5 Mini
Vals Multimodal IndexNot measured52.8%Only MiMo-V2.5 measured
IFBench75.4%67.1%GPT-5 Mini
Long context reasoning (AA-LCR)72.3%73.0%MiMo-V2.5
DTBench80.5%Not measuredOnly GPT-5 Mini measured
LMCA34.2%Not measuredOnly GPT-5 Mini measured
Fiction.LiveBench69.4%Not measuredOnly GPT-5 Mini measured
Creative writing (Lech Mazur)83.1%Not measuredOnly GPT-5 Mini measured
LMArena Text13731428MiMo-V2.5
LMArena Text: instruction following13571435MiMo-V2.5
LMArena Text: creative writing13251393MiMo-V2.5
LMArena Vision12021247MiMo-V2.5
LMArena Text: English13791447MiMo-V2.5
LMArena Text: non-English13631405MiMo-V2.5
LMArena Text: Chinese13861469MiMo-V2.5
LMArena Text: German13661421MiMo-V2.5
LMArena Text: Japanese13411306GPT-5 Mini
LMArena Text: Korean13081361MiMo-V2.5
LMArena Text: French13861448MiMo-V2.5
LMArena Text: Spanish13541414MiMo-V2.5
LMArena Text: Russian13621396MiMo-V2.5
LMArena Text: Polish13781413MiMo-V2.5
LMArena Text: multi-turn13631445MiMo-V2.5
LMArena Text: longer queries13551445MiMo-V2.5
LMArena Text: writing and language13441409MiMo-V2.5
LMArena Text: entertainment and media13401399MiMo-V2.5
LMArena Vision: English12161259MiMo-V2.5
LMArena Vision: Chinese12141326MiMo-V2.5
LMArena Vision: reading text11991256MiMo-V2.5
LMArena Vision: humor12051226MiMo-V2.5
LMArena Vision: captioning1217Not measuredOnly GPT-5 Mini measured
LMArena Vision: recognizing things12261189GPT-5 Mini
LMArena Vision: creative writing11811230MiMo-V2.5
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
Image generation benchmarks for GPT-5 Mini and MiMo-V2.5
BenchmarkGPT-5 MiniMiMo-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

GPT-5 Mini$0.0013Fits in one request
MiMo-V2.5$0.0003Fits in one request

MiMo-V2.5 costs less

Repository review

50K input + 3K output tokens

GPT-5 Mini$0.018Fits in one request
MiMo-V2.5$0.0094Fits in one request

MiMo-V2.5 costs less

Agent loop

200K input + 10K output tokens

GPT-5 Mini$0.070Fits 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 GPT-5 Mini and MiMo-V2.5
SpecificationOpenAI GPT-5 MiniXiaomi MiMo-V2.5
MakerOpenAIXiaomi
WeightsNo public weights listedOpen weights
ReleasedAugust 7, 2025April 22, 2026
Context window400K1.05M
Input $/Mtok$0.25$0.168
Output $/Mtok$2.00$0.336
Coding index34.250.0
Independent measurements behind it23
Cost per solved task$0.08$0.01
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5 Mini better than MiMo-V2.5 for coding?

Pick MiMo-V2.5 for coding: it scores 50.0 on the Vibe Coding Index against 34.2 for GPT-5 Mini. Pick GPT-5 Mini for work measured by LiveCodeBench (Vals AI) or LegalBench (Vals AI), where it leads.

Which is cheaper, GPT-5 Mini or MiMo-V2.5?

GPT-5 Mini costs $0.25 per million input tokens and $2.00 per million output tokens; MiMo-V2.5 costs $0.168 and $0.336. Per solved SWE-bench Verified task, GPT-5 Mini costs $0.08 and MiMo-V2.5 $0.01.

Which has the bigger context window, GPT-5 Mini or MiMo-V2.5?

MiMo-V2.5, with 1.05M tokens against 400K.

How many benchmarks is the GPT-5 Mini vs MiMo-V2.5 comparison based on?

67 benchmarks have a result for both models as of October 21, 2026. GPT-5 Mini's coding index rests on 2 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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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gpt-5-mini-vs-xiaomi-mimo-v2-5">LLMBenchmark.ai, GPT-5 Mini vs MiMo-V2.5</a></p>