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GPT-5.4 Mini vs GPT-6.1 Sol

GPT-6.1 Sol leads GPT-5.4 Mini on coding, 82.4 to 35.8 on the Vibe Coding Index, and GPT-5.4 Mini costs 2.2x less per output token ($4.50 vs $10.00 per million). Updated October 22, 2026; 61 benchmarks have a result for both.

Replace GPT-5.4 Mini Replace GPT-6.1 Sol
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
1
GPT-6.1 SolOpenAI
Coding
82.4
Overall
81.4
Output $/M
$10.00
60
vs boards won of 61 shared

GPT-5.4 Mini or GPT-6.1 Sol: which to pick

Pick GPT-6.1 Sol for coding: it scores 82.4 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini.

Pick GPT-5.4 Mini for output tokens 2.2x cheaper ($4.50 vs $10.00 per million) and work measured by SAGE (Vals AI), where it leads.

Model AGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved taskModel BGPT-6.1 SolOpenAI82.4/1005 independent benchmarksNo cost per solved task
Shared results
61
GPT-5.4 Mini only
28
GPT-6.1 Sol only
37
Like-for-like categories
7 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 Mini 35.8 from 5 benchmarks, GPT-6.1 Sol 82.4 from 5 benchmarks.
Widest category
Math, 41.3 points apart on average over 6 shared benchmarks.
Widest single gap
FrontierMath, tier 4: GPT-5.4 Mini 9.8% against GPT-6.1 Sol 100.0%, 90.2 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Mini $4.50 against GPT-6.1 Sol $10.00 per million output tokens, 2.2x apart.
Context window
GPT-5.4 Mini takes 400K tokens, GPT-6.1 Sol 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-5.4 MiniBarsGPT-6.1 SolTies
Coding012
Intelligence02
Agentic work04
Reasoning011
Math06
Knowledge05
General120
All shared boards160
CodingLike-for-likeSix of these boards feed the Vibe Coding Index012
Coding benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
LiveBench codingNot measured96.0%Only GPT-6.1 Sol measured
LMArena WebDev13971753GPT-6.1 Sol
AA Coding Index56.1Not measuredOnly GPT-5.4 Mini measured
LiveCodeBench (Vals AI)81.5%Not measuredOnly GPT-5.4 Mini measured
SWE-bench Verified (Vals AI)73.0%Not measuredOnly GPT-5.4 Mini measured
Terminal-Bench 4 (Vals AI)2.5%55.0%GPT-6.1 Sol
Vibe Code Bench (Vals AI)48.0%88.9%GPT-6.1 Sol
Code migration (Vals AI)12.9%65.1%GPT-6.1 Sol
ProgramBench (Vals AI)0.0%3.0%GPT-6.1 Sol
IOI (Vals AI)Not measured96.9%Only GPT-6.1 Sol measured
Terminal-Bench 2.1 (Vals AI)54.7%Not measuredOnly GPT-5.4 Mini measured
SWE-bench Multimodal (Vals AI)Not measured43.5%Only GPT-6.1 Sol measured
CyberBench (Vals AI)Not measured39.3%Only GPT-6.1 Sol measured
SciCode52.1%55.8%GPT-6.1 Sol
Terminal-Bench Hard (Artificial Analysis run)52.3%Not measuredOnly GPT-5.4 Mini measured
FrontierCode27.0%50.2%GPT-6.1 Sol
WeirdML60.3%Not measuredOnly GPT-5.4 Mini measured
ALE-Bench1188.62743.8GPT-6.1 Sol
LMArena Text: coding14381478GPT-6.1 Sol
LMArena Text: software and IT14361476GPT-6.1 Sol
LMArena WebDev: React13861754GPT-6.1 Sol
LMArena WebDev: HTML14191800GPT-6.1 Sol
LMArena WebDev: from an imageNot measured1702Only GPT-6.1 Sol measured
SciCodeNot measured9.2%Only GPT-6.1 Sol measured
Neither model has a result on the other 15 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
AA Intelligence Index24.151.8GPT-6.1 Sol
Epoch Capabilities Index148.7168.4GPT-6.1 Sol
Agentic workLike-for-likePublic boards, shown as published, kept out of the index04
Agentic work benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
AA Agentic Index17.9Not measuredOnly GPT-5.4 Mini measured
Design Arena: agents building web appsNot measured1306Only GPT-6.1 Sol measured
Design Arena: agents building mobile appsNot measured1213Only GPT-6.1 Sol measured
Design Arena: spreadsheetsNot measured1259Only GPT-6.1 Sol measured
LiveBench researchNot measured83.5%Only GPT-6.1 Sol measured
LiveBench browserNot measured88.0%Only GPT-6.1 Sol measured
LiveBench long agenticNot measured73.0%Only GPT-6.1 Sol measured
SREBench (Vals AI)Not measured50.8%Only GPT-6.1 Sol measured
Finance Agent (Vals AI)45.4%52.0%GPT-6.1 Sol
Tax Agent Bench (Vals AI)8.8%21.8%GPT-6.1 Sol
Legal Research Bench (Vals AI)12.5%38.5%GPT-6.1 Sol
Harvey's Legal Agent Benchmark (Vals AI)Not measured6.3%Only GPT-6.1 Sol measured
Excel Modeling Benchmark (Vals AI)45.4%70.8%GPT-6.1 Sol
BioMysteryBench (Vals AI)Not measured79.6%Only GPT-6.1 Sol measured
Terminal-Bench-Science (Vals AI)Not measured52.9%Only GPT-6.1 Sol measured
Vals Science IndexNot measured59.6%Only GPT-6.1 Sol measured
Robo-bench (Vals AI)Not measured28.3%Only GPT-6.1 Sol measured
τ²-Bench Telecom83.3%Not measuredOnly GPT-5.4 Mini measured
APEX-AgentsNot measured60.0%Only GPT-6.1 Sol measured
DeepResearch Bench36.3%Not measuredOnly GPT-5.4 Mini measured
SpireClimbNot measured24.7%Only GPT-6.1 Sol measured
Neither model has a result on the other 20 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index011
Reasoning benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
GPQA Diamond83.1%Not measuredOnly GPT-5.4 Mini measured
LiveBench reasoningNot measured92.6%Only GPT-6.1 Sol measured
MysteryMechanism (Vals AI)Not measured46.4%Only GPT-6.1 Sol measured
MMMU Pro (Vals AI)79.3%Not measuredOnly GPT-5.4 Mini measured
GPQA Diamond (Artificial Analysis run)87.5%Not measuredOnly GPT-5.4 Mini measured
Humanity's Last Exam (Artificial Analysis run)28.1%52.9%GPT-6.1 Sol
GPQA Diamond (Epoch AI run)86.9%95.4%GPT-6.1 Sol
ARC-AGI63.7%98.5%GPT-6.1 Sol
ARC-AGI-218.9%94.2%GPT-6.1 Sol
Chess puzzles23.0%68.0%GPT-6.1 Sol
Mystery game puzzles11.0%80.0%GPT-6.1 Sol
EBR-benchNot measured54.3%Only GPT-6.1 Sol measured
LMArena Text: hard prompts14241463GPT-6.1 Sol
LMArena Text: expert14351489GPT-6.1 Sol
LMArena Text: hard prompts in English14201465GPT-6.1 Sol
LMArena Vision: diagrams12661306GPT-6.1 Sol
LMArena Vision: homework12851356GPT-6.1 Sol
Kagi LLM Benchmark37.9%Not measuredOnly GPT-5.4 Mini measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index06
Math benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
AIME95.6%Not measuredOnly GPT-5.4 Mini measured
OTIS Mock AIME88.9%100.0%GPT-6.1 Sol
FrontierMath, tiers 1 to 351.2%93.7%GPT-6.1 Sol
FrontierMath, tier 49.8%100.0%GPT-6.1 Sol
ProofBench21.0%99.0%GPT-6.1 Sol
LMArena Text: math14181489GPT-6.1 Sol
LMArena Text: mathematical work14291513GPT-6.1 Sol
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index05
Knowledge benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
MMLU Pro84.5%Not measuredOnly GPT-5.4 Mini measured
CaseLaw (Vals AI)51.7%Not measuredOnly GPT-5.4 Mini measured
CorpFin (Vals AI)60.9%Not measuredOnly GPT-5.4 Mini measured
TaxEval (Vals AI)71.2%Not measuredOnly GPT-5.4 Mini measured
MortgageTax (Vals AI)63.5%Not measuredOnly GPT-5.4 Mini measured
MedCode (Vals AI)Not measured48.8%Only GPT-6.1 Sol measured
SimpleQA Verified29.4%73.9%GPT-6.1 Sol
LMArena Text: science14171444GPT-6.1 Sol
LMArena Text: medicine and healthcare13951433GPT-6.1 Sol
LMArena Text: legal and government14141471GPT-6.1 Sol
LMArena Text: business and finance14181445GPT-6.1 Sol
FACTS Benchmark SuiteNot measured75.3%Only GPT-6.1 Sol measured
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
Web design benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
Design Arena: websitesNot measured1321Only GPT-6.1 Sol measured
Design Arena: UI componentsNot measured1317Only GPT-6.1 Sol measured
Design Arena: game devNot measured1389Only GPT-6.1 Sol measured
Design Arena: data vizNot measured1281Only GPT-6.1 Sol measured
Design Arena: 3DNot measured1460Only GPT-6.1 Sol measured
Design Arena: all code categoriesNot measured1345Only GPT-6.1 Sol measured
LiveBench designNot measured82.1%Only GPT-6.1 Sol measured
Neither model has a result on the other 2 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index120
General benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
Vals IndexNot measured63.9%Only GPT-6.1 Sol measured
LiveBench data analysisNot measured82.7%Only GPT-6.1 Sol measured
Public Benefits Bench (Vals AI)Not measured59.3%Only GPT-6.1 Sol measured
SAGE (Vals AI)50.8%46.5%GPT-5.4 Mini
MedScribe (Vals AI)Not measured86.5%Only GPT-6.1 Sol measured
Vals Multimodal Index54.2%Not measuredOnly GPT-5.4 Mini measured
IFBench73.3%Not measuredOnly GPT-5.4 Mini measured
Long context reasoning (AA-LCR)77.0%84.0%GPT-6.1 Sol
DTBench80.0%96.5%GPT-6.1 Sol
LMCA40.8%62.8%GPT-6.1 Sol
Furniture assemblyNot measured80.0%Only GPT-6.1 Sol measured
LMArena Text14121443GPT-6.1 Sol
LMArena Text: instruction following14051466GPT-6.1 Sol
LMArena Text: creative writing13701425GPT-6.1 Sol
LMArena Vision12451288GPT-6.1 Sol
LMArena Text: English14121450GPT-6.1 Sol
LMArena Text: non-English14051433GPT-6.1 Sol
LMArena Text: Chinese14461487GPT-6.1 Sol
LMArena Text: German1408Not measuredOnly GPT-5.4 Mini measured
LMArena Text: Japanese1375Not measuredOnly GPT-5.4 Mini measured
LMArena Text: Korean1370Not measuredOnly GPT-5.4 Mini measured
LMArena Text: French14411460GPT-6.1 Sol
LMArena Text: Spanish14051439GPT-6.1 Sol
LMArena Text: Russian14171457GPT-6.1 Sol
LMArena Text: Polish1415Not measuredOnly GPT-5.4 Mini measured
LMArena Text: multi-turn14291442GPT-6.1 Sol
LMArena Text: longer queries14081458GPT-6.1 Sol
LMArena Text: writing and language13931444GPT-6.1 Sol
LMArena Text: entertainment and media13731426GPT-6.1 Sol
LMArena Vision: English12441274GPT-6.1 Sol
LMArena Vision: Chinese1286Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: reading text12531289GPT-6.1 Sol
LMArena Vision: humor1235Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: recognizing things1218Not measuredOnly GPT-5.4 Mini measured
LMArena Vision: creative writing12221301GPT-6.1 Sol
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-5.4 Mini and GPT-6.1 Sol
BenchmarkGPT-5.4 MiniGPT-6.1 SolLeader
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 Mini$0.0030Fits in one request
GPT-6.1 Sol$0.0070Fits in one request

GPT-5.4 Mini costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Mini$0.051Fits in one request
GPT-6.1 Sol$0.130Fits in one request

GPT-5.4 Mini costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Mini$0.195Fits in one request
GPT-6.1 Sol$0.500Fits in one request

GPT-5.4 Mini 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 Mini and GPT-6.1 Sol
SpecificationOpenAI GPT-5.4 MiniOpenAI GPT-6.1 Sol
MakerOpenAIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedMarch 17, 2026September 29, 2026
Context window400K1.05M
Input $/Mtok$0.75$2.00
Output $/Mtok$4.50$10.00
Coding index35.882.4
Independent measurements behind it55
Cost per solved task$0.70Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Mini better than GPT-6.1 Sol for coding?

Pick GPT-6.1 Sol for coding: it scores 82.4 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini. Pick GPT-5.4 Mini for output tokens 2.2x cheaper ($4.50 vs $10.00 per million) and work measured by SAGE (Vals AI), where it leads.

Which is cheaper, GPT-5.4 Mini or GPT-6.1 Sol?

GPT-5.4 Mini costs $0.75 per million input tokens and $4.50 per million output tokens; GPT-6.1 Sol costs $2.00 and $10.00. Cost per solved task is known for GPT-5.4 Mini only.

Which has the bigger context window, GPT-5.4 Mini or GPT-6.1 Sol?

GPT-6.1 Sol, with 1.05M tokens against 400K.

How many benchmarks is the GPT-5.4 Mini vs GPT-6.1 Sol comparison based on?

61 benchmarks have a result for both models as of October 22, 2026. GPT-5.4 Mini's coding index rests on 5 independent benchmarks and GPT-6.1 Sol's on 5. Where only one model has a result, the page says so instead of naming a winner.

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