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GPT-5.4 vs MiMo-V2.5-Pro

GPT-5.4 leads MiMo-V2.5-Pro on coding, 64.4 to 31.6 on the Vibe Coding Index, and MiMo-V2.5-Pro costs 16.4x less per output token ($0.9152 vs $15.00 per million). Updated October 21, 2026; 62 benchmarks have a result for both.

Replace GPT-5.4 Replace MiMo-V2.5-Pro
GPT-5.4OpenAI
Coding
64.4
Overall
69.6
Output $/M
$15.00
40
MiMo-V2.5-ProXiaomi
Coding
31.6
Overall
39.3
Output $/M
$0.9152
22
vs boards won of 62 shared

GPT-5.4 or MiMo-V2.5-Pro: which to pick

Pick GPT-5.4 for coding: it scores 64.4 on the Vibe Coding Index against 31.6 for MiMo-V2.5-Pro, though on 3 benchmarks against 4.

Pick MiMo-V2.5-Pro for output tokens 16.4x cheaper ($0.9152 vs $15.00 per million) and a lower cost per solved task ($0.03 against $1.02).

Model AGPT-5.4OpenAI64.4/1003 independent benchmarks$1.02 per solved taskModel BMiMo-V2.5-ProXiaomi31.6/1004 independent benchmarks$0.03 per solved task
Shared results
62
GPT-5.4 only
48
MiMo-V2.5-Pro only
8
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-5.4 64.4 from 3 benchmarks, MiMo-V2.5-Pro 31.6 from 4 benchmarks.
Widest category
Intelligence, 13.0 points apart on average over 1 shared benchmark.
Widest single gap
ProofBench: GPT-5.4 56.0% against MiMo-V2.5-Pro 22.0%, 34.0 points apart on a 0 to 100 scale.
Output price
GPT-5.4 $15.00 against MiMo-V2.5-Pro $0.9152 per million output tokens, 16.4x apart.
Context window
Both take 1.05M tokens.

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-5.4BarsMiMo-V2.5-ProTies
Coding84
Intelligence10
Agentic work01
Reasoning42
Math30
Knowledge72
Web design17
General166
All shared boards4022
CodingLike-for-likeSix of these boards feed the Vibe Coding Index84
Coding benchmarks for GPT-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-ProLeader
LMArena WebDev14641480MiMo-V2.5-Pro
AA Coding Index71.160.2GPT-5.4
LiveCodeBench (Vals AI)84.1%81.3%GPT-5.4
SWE-bench Verified (Vals AI)78.2%74.0%GPT-5.4
Terminal-Bench 4 (Vals AI)Not measured0.5%Only MiMo-V2.5-Pro measured
Vibe Code Bench (Vals AI)67.4%34.1%GPT-5.4
Code migration (Vals AI)35.0%21.6%GPT-5.4
ProgramBench (Vals AI)0.5%Not measuredOnly GPT-5.4 measured
Terminal-Bench 2.1 (Vals AI)Not measured57.3%Only MiMo-V2.5-Pro measured
SkillsBench (Vals AI)51.7%Not measuredOnly GPT-5.4 measured
SciCodeNot measured50.6%Only MiMo-V2.5-Pro measured
Terminal-Bench Hard (Artificial Analysis run)57.6%43.2%GPT-5.4
Terminal-Bench81.8%Not measuredOnly GPT-5.4 measured
GSO-Bench31.4%Not measuredOnly GPT-5.4 measured
WeirdML77.7%Not measuredOnly GPT-5.4 measured
MirrorCode15.6%Not measuredOnly GPT-5.4 measured
ALE-Bench1607.0899.8GPT-5.4
LMArena Text: coding14961501MiMo-V2.5-Pro
LMArena Text: software and IT14911495MiMo-V2.5-Pro
LMArena WebDev: React14541469MiMo-V2.5-Pro
LMArena WebDev: HTML14781473GPT-5.4
LMArena WebDev: from an image1436Not measuredOnly GPT-5.4 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 GPT-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-ProLeader
AA Intelligence Index39.026.0GPT-5.4
Epoch Capabilities Index157.3Not measuredOnly GPT-5.4 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for GPT-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-ProLeader
AA Agentic IndexNot measured21.3Only MiMo-V2.5-Pro measured
Design Arena: agents building web apps1059Not measuredOnly GPT-5.4 measured
Design Arena: agents building full-stack apps1017Not measuredOnly GPT-5.4 measured
Design Arena: agents building mobile apps1087Not measuredOnly GPT-5.4 measured
Design Arena: agents building Android apps1030Not measuredOnly GPT-5.4 measured
Design Arena: agents building Godot games1135Not measuredOnly GPT-5.4 measured
Finance Agent (Vals AI)Not measured41.5%Only MiMo-V2.5-Pro measured
Tax Agent Bench (Vals AI)Not measured11.5%Only MiMo-V2.5-Pro measured
Legal Research Bench (Vals AI)Not measured15.9%Only MiMo-V2.5-Pro measured
Excel Modeling Benchmark (Vals AI)Not measured55.2%Only MiMo-V2.5-Pro measured
τ²-Bench Telecom87.1%94.2%MiMo-V2.5-Pro
APEX-Agents52.4%Not measuredOnly GPT-5.4 measured
METR time horizons74.3%Not measuredOnly GPT-5.4 measured
DeepResearch Bench35.1%Not measuredOnly GPT-5.4 measured
PostTrainBench19.0%Not measuredOnly GPT-5.4 measured
Vending-Bench 2$6,144Not measuredOnly GPT-5.4 measured
Neither model has a result on the other 25 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index42
Reasoning benchmarks for GPT-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-ProLeader
GPQA Diamond91.7%82.6%GPT-5.4
MMMU Pro (Vals AI)87.5%Not measuredOnly GPT-5.4 measured
GPQA Diamond (Artificial Analysis run)92.0%86.6%GPT-5.4
Humanity's Last Exam (Artificial Analysis run)43.7%35.7%GPT-5.4
GPQA Diamond (Epoch AI run)93.3%Not measuredOnly GPT-5.4 measured
ARC-AGI93.7%Not measuredOnly GPT-5.4 measured
ARC-AGI-274.0%Not measuredOnly GPT-5.4 measured
Chess puzzles48.0%Not measuredOnly GPT-5.4 measured
Mystery game puzzles37.0%Not measuredOnly GPT-5.4 measured
EBR-bench25.4%Not measuredOnly GPT-5.4 measured
LMArena Text: hard prompts14851486MiMo-V2.5-Pro
LMArena Text: expert15071501GPT-5.4
LMArena Text: hard prompts in English14791494MiMo-V2.5-Pro
LMArena Vision: diagrams1327Not measuredOnly GPT-5.4 measured
LMArena Vision: homework1336Not measuredOnly GPT-5.4 measured
Kagi LLM Benchmark63.8%Not measuredOnly GPT-5.4 measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for GPT-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-ProLeader
AIME96.7%Not measuredOnly GPT-5.4 measured
OTIS Mock AIME97.8%Not measuredOnly GPT-5.4 measured
FrontierMath, tiers 1 to 378.6%Not measuredOnly GPT-5.4 measured
FrontierMath, tier 449.0%Not measuredOnly GPT-5.4 measured
ProofBench56.0%22.0%GPT-5.4
LMArena Text: math14881481GPT-5.4
LMArena Text: mathematical work14971491GPT-5.4
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index72
Knowledge benchmarks for GPT-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-ProLeader
MMLU Pro87.5%84.6%GPT-5.4
LegalBench (Vals AI)86.0%77.1%GPT-5.4
CaseLaw (Vals AI)63.8%Not measuredOnly GPT-5.4 measured
CorpFin (Vals AI)65.3%61.4%GPT-5.4
TaxEval (Vals AI)74.0%73.8%GPT-5.4
MortgageTax (Vals AI)68.3%Not measuredOnly GPT-5.4 measured
MedQA (Vals AI)96.1%Not measuredOnly GPT-5.4 measured
MedCode (Vals AI)41.3%32.5%GPT-5.4
SimpleQA Verified45.1%Not measuredOnly GPT-5.4 measured
LMArena Text: science14791482MiMo-V2.5-Pro
LMArena Text: medicine and healthcare14581473MiMo-V2.5-Pro
LMArena Text: legal and government14861474GPT-5.4
LMArena Text: business and finance14741466GPT-5.4
Neither model has a result on the other 5 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index17
Web design benchmarks for GPT-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-ProLeader
Design Arena: websites11991267MiMo-V2.5-Pro
Design Arena: UI components12151249MiMo-V2.5-Pro
Design Arena: game dev11951262MiMo-V2.5-Pro
Design Arena: data viz11961257MiMo-V2.5-Pro
Design Arena: 3D10661244MiMo-V2.5-Pro
Design Arena: all code categories11801266MiMo-V2.5-Pro
Design Arena: SVG11421181MiMo-V2.5-Pro
Design Arena: ASCII art11881156GPT-5.4
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index166
General benchmarks for GPT-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-ProLeader
SAGE (Vals AI)43.3%Not measuredOnly GPT-5.4 measured
MedScribe (Vals AI)77.5%83.7%MiMo-V2.5-Pro
IFBench73.9%79.9%MiMo-V2.5-Pro
Long context reasoning (AA-LCR)82.0%79.7%GPT-5.4
DTBench94.4%84.5%GPT-5.4
LMCA52.0%29.5%GPT-5.4
CL-bench27.9%Not measuredOnly GPT-5.4 measured
Furniture assembly37.5%Not measuredOnly GPT-5.4 measured
CL-bench Life21.7%Not measuredOnly GPT-5.4 measured
LMArena Text14691464GPT-5.4
LMArena Text: instruction following14691475MiMo-V2.5-Pro
LMArena Text: creative writing14391438GPT-5.4
LMArena Vision1303Not measuredOnly GPT-5.4 measured
LMArena Text: English14671477MiMo-V2.5-Pro
LMArena Text: non-English14651448GPT-5.4
LMArena Text: Chinese15201507GPT-5.4
LMArena Text: German14721459GPT-5.4
LMArena Text: Japanese14851410GPT-5.4
LMArena Text: Korean14491435GPT-5.4
LMArena Text: French14931487GPT-5.4
LMArena Text: Spanish14521469MiMo-V2.5-Pro
LMArena Text: Russian14801449GPT-5.4
LMArena Text: Polish14721464GPT-5.4
LMArena Text: multi-turn14821476GPT-5.4
LMArena Text: longer queries14731481MiMo-V2.5-Pro
LMArena Text: writing and language14581451GPT-5.4
LMArena Text: entertainment and media14381438GPT-5.4
LMArena Vision: English1301Not measuredOnly GPT-5.4 measured
LMArena Vision: Chinese1354Not measuredOnly GPT-5.4 measured
LMArena Vision: reading text1312Not measuredOnly GPT-5.4 measured
LMArena Vision: humor1284Not measuredOnly GPT-5.4 measured
LMArena Vision: recognizing things1251Not measuredOnly GPT-5.4 measured
LMArena Vision: creative writing1283Not measuredOnly GPT-5.4 measured
LMArena Document1471Not measuredOnly GPT-5.4 measured
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-5.4 and MiMo-V2.5-Pro
BenchmarkGPT-5.4MiMo-V2.5-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

GPT-5.4$0.010Fits in one request
MiMo-V2.5-Pro$0.0009Fits in one request

MiMo-V2.5-Pro costs less

Repository review

50K input + 3K output tokens

GPT-5.4$0.170Fits in one request
MiMo-V2.5-Pro$0.026Fits in one request

MiMo-V2.5-Pro costs less

Agent loop

200K input + 10K output tokens

GPT-5.4$0.650Fits in one request
MiMo-V2.5-Pro$0.101Fits in one request

MiMo-V2.5-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 GPT-5.4 and MiMo-V2.5-Pro
SpecificationOpenAI GPT-5.4Xiaomi MiMo-V2.5-Pro
MakerOpenAIXiaomi
WeightsNo public weights listedOpen weights
ReleasedMarch 5, 2026April 22, 2026
Context window1.05M1.05M
Input $/Mtok$2.50$0.4575
Output $/Mtok$15.00$0.9152
Coding index64.431.6
Independent measurements behind it34
Cost per solved task$1.02$0.03
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 better than MiMo-V2.5-Pro for coding?

Pick GPT-5.4 for coding: it scores 64.4 on the Vibe Coding Index against 31.6 for MiMo-V2.5-Pro, though on 3 benchmarks against 4. Pick MiMo-V2.5-Pro for output tokens 16.4x cheaper ($0.9152 vs $15.00 per million) and a lower cost per solved task ($0.03 against $1.02).

Which is cheaper, GPT-5.4 or MiMo-V2.5-Pro?

GPT-5.4 costs $2.50 per million input tokens and $15.00 per million output tokens; MiMo-V2.5-Pro costs $0.4575 and $0.9152. Per solved SWE-bench Verified task, GPT-5.4 costs $1.02 and MiMo-V2.5-Pro $0.03.

Which has the bigger context window, GPT-5.4 or MiMo-V2.5-Pro?

Neither: both take 1.05M tokens.

How many benchmarks is the GPT-5.4 vs MiMo-V2.5-Pro comparison based on?

62 benchmarks have a result for both models as of October 21, 2026. GPT-5.4's coding index rests on 3 independent benchmarks and MiMo-V2.5-Pro's on 4. 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-5-4-vs-xiaomi-mimo-v2-5-pro">LLMBenchmark.ai, GPT-5.4 vs MiMo-V2.5-Pro</a></p>