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Gemini 2.5 Pro vs GPT-5.4 Nano

GPT-5.4 Nano leads Gemini 2.5 Pro on coding, 44.8 to 19.1 on the Vibe Coding Index, and GPT-5.4 Nano costs 8.0x less per output token ($1.25 vs $10.00 per million). Updated October 21, 2026; 66 benchmarks have a result for both.

Replace Gemini 2.5 Pro Replace GPT-5.4 Nano
Gemini 2.5 ProGoogle
Coding
19.1
Overall
41.8
Output $/M
$10.00
46
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
20
vs boards won of 66 shared

Gemini 2.5 Pro or GPT-5.4 Nano: which to pick

Pick GPT-5.4 Nano for coding: it scores 44.8 on the Vibe Coding Index against 19.1 for Gemini 2.5 Pro, though on 2 benchmarks against 3.

Pick Gemini 2.5 Pro for a larger context window (1.05M against 400K tokens) and work measured by WeirdML or LMArena Text: coding, where it leads.

Model AGemini 2.5 ProGoogle19.1/1003 independent benchmarks$0.64 per solved taskModel BGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved task
Shared results
66
Gemini 2.5 Pro only
24
GPT-5.4 Nano only
19
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
Gemini 2.5 Pro 19.1 from 3 benchmarks, GPT-5.4 Nano 44.8 from 2 benchmarks.
Widest category
Agentic work, 18.2 points apart on average over 2 shared benchmarks.
Widest single gap
Kagi LLM Benchmark: Gemini 2.5 Pro 70.3% against GPT-5.4 Nano 39.7%, 30.6 points apart on a 0 to 100 scale.
Output price
Gemini 2.5 Pro $10.00 against GPT-5.4 Nano $1.25 per million output tokens, 8.0x apart.
Context window
Gemini 2.5 Pro takes 1.05M tokens, GPT-5.4 Nano 400K.

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
CategoryGemini 2.5 ProBarsGPT-5.4 NanoTies
Coding35
Intelligence02
Agentic work02
Reasoning83
Math23
Knowledge71
General264
All shared boards4620
CodingLike-for-likeSix of these boards feed the Vibe Coding Index35
Coding benchmarks for Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
SWE-bench Verified53.6%Not measuredOnly Gemini 2.5 Pro measured
LMArena WebDev1226Not measuredOnly Gemini 2.5 Pro measured
AA Coding Index33.356.1GPT-5.4 Nano
LiveCodeBench (Vals AI)Not measured84.0%Only GPT-5.4 Nano measured
SWE-bench Verified (Vals AI)54.4%69.8%GPT-5.4 Nano
Vibe Code Bench (Vals AI)0.4%26.1%GPT-5.4 Nano
Code migration (Vals AI)Not measured14.5%Only GPT-5.4 Nano measured
Terminal-Bench 2.1 (Vals AI)Not measured41.6%Only GPT-5.4 Nano measured
LiveCodeBench (Artificial Analysis run)80.1%Not measuredOnly Gemini 2.5 Pro measured
SciCode46.3%47.2%GPT-5.4 Nano
Terminal-Bench Hard (Artificial Analysis run)26.5%42.4%GPT-5.4 Nano
Terminal-Bench32.6%Not measuredOnly Gemini 2.5 Pro measured
GSO-Bench3.9%Not measuredOnly Gemini 2.5 Pro measured
WeirdML54.0%49.2%Gemini 2.5 Pro
ALE-BenchNot measured1004.5Only GPT-5.4 Nano measured
LMArena Text: coding14521404Gemini 2.5 Pro
LMArena Text: software and IT14591402Gemini 2.5 Pro
LMArena WebDev: HTML1235Not measuredOnly Gemini 2.5 Pro measured
LMArena WebDev: from an image1285Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 20 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
AA Intelligence Index16.120.7GPT-5.4 Nano
Epoch Capabilities Index145.1146.0GPT-5.4 Nano
Agentic workLike-for-likePublic boards, shown as published, kept out of the index02
Agentic work benchmarks for Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
AA Agentic Index1.616.0GPT-5.4 Nano
Finance Agent (Vals AI)Not measured38.2%Only GPT-5.4 Nano measured
Tax Agent Bench (Vals AI)Not measured5.0%Only GPT-5.4 Nano measured
Legal Research Bench (Vals AI)Not measured6.3%Only GPT-5.4 Nano measured
Excel Modeling Benchmark (Vals AI)Not measured44.8%Only GPT-5.4 Nano measured
τ²-Bench Telecom54.1%76.0%GPT-5.4 Nano
GDPval23.3%Not measuredOnly Gemini 2.5 Pro measured
DeepResearch Bench41.5%Not measuredOnly Gemini 2.5 Pro measured
Vending-Bench 2$574Not measuredOnly Gemini 2.5 Pro measured
BrowseComp-Plus29.5%Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 31 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index83
Reasoning benchmarks for Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
GPQA DiamondNot measured77.5%Only GPT-5.4 Nano measured
MMMU Pro (Vals AI)Not measured73.6%Only GPT-5.4 Nano measured
GPQA Diamond (Artificial Analysis run)84.4%81.7%Gemini 2.5 Pro
Humanity's Last Exam (Artificial Analysis run)22.5%28.3%GPT-5.4 Nano
GPQA Diamond (Epoch AI run)85.3%78.5%Gemini 2.5 Pro
ARC-AGI41.0%51.5%GPT-5.4 Nano
ARC-AGI-24.9%5.7%GPT-5.4 Nano
Chess puzzlesNot measured45.0%Only GPT-5.4 Nano measured
Mystery game puzzlesNot measured9.0%Only GPT-5.4 Nano measured
LMArena Text: hard prompts14551381Gemini 2.5 Pro
LMArena Text: expert14521396Gemini 2.5 Pro
LMArena Text: hard prompts in English14531387Gemini 2.5 Pro
LMArena Vision: diagrams12741210Gemini 2.5 Pro
LMArena Vision: homework12811225Gemini 2.5 Pro
Kagi LLM Benchmark70.3%39.7%Gemini 2.5 Pro
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index23
Math benchmarks for Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
AIMENot measured88.8%Only GPT-5.4 Nano measured
AA Math Index87.7Not measuredOnly Gemini 2.5 Pro measured
AIME 2025 (Artificial Analysis run)87.7%Not measuredOnly Gemini 2.5 Pro measured
OTIS Mock AIME84.7%87.8%GPT-5.4 Nano
FrontierMath, tiers 1 to 324.6%44.9%GPT-5.4 Nano
FrontierMath, tier 40.0%12.2%GPT-5.4 Nano
ProofBenchNot measured5.0%Only GPT-5.4 Nano measured
LMArena Text: math14501405Gemini 2.5 Pro
LMArena Text: mathematical work14541409Gemini 2.5 Pro
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index71
Knowledge benchmarks for Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
MMLU ProNot measured77.2%Only GPT-5.4 Nano measured
LegalBench (Vals AI)Not measured77.9%Only GPT-5.4 Nano measured
CaseLaw (Vals AI)63.9%51.9%Gemini 2.5 Pro
CorpFin (Vals AI)60.8%61.2%GPT-5.4 Nano
TaxEval (Vals AI)Not measured67.4%Only GPT-5.4 Nano measured
MortgageTax (Vals AI)68.9%59.1%Gemini 2.5 Pro
MedCode (Vals AI)50.6%41.0%Gemini 2.5 Pro
MMLU Pro (Artificial Analysis run)86.2%Not measuredOnly Gemini 2.5 Pro measured
SimpleQA VerifiedNot measured11.7%Only GPT-5.4 Nano measured
LMArena Text: science14801374Gemini 2.5 Pro
LMArena Text: medicine and healthcare14761369Gemini 2.5 Pro
LMArena Text: legal and government14801368Gemini 2.5 Pro
LMArena Text: business and finance14391366Gemini 2.5 Pro
FACTS Benchmark Suite61.5%Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 4 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
Design Arena: websites1167Not measuredOnly Gemini 2.5 Pro measured
Design Arena: UI components1140Not measuredOnly Gemini 2.5 Pro measured
Design Arena: game dev1111Not measuredOnly Gemini 2.5 Pro measured
Design Arena: data viz1221Not measuredOnly Gemini 2.5 Pro measured
Design Arena: 3D1081Not measuredOnly Gemini 2.5 Pro measured
Design Arena: all code categories1152Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index264
General benchmarks for Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
SAGE (Vals AI)41.9%38.1%Gemini 2.5 Pro
MedScribe (Vals AI)73.5%77.1%GPT-5.4 Nano
Vals Multimodal IndexNot measured47.6%Only GPT-5.4 Nano measured
IFBench48.7%75.9%GPT-5.4 Nano
Long context reasoning (AA-LCR)69.0%76.7%GPT-5.4 Nano
DTBench82.4%80.3%Gemini 2.5 Pro
LMCA34.8%36.9%GPT-5.4 Nano
Creative writing (Lech Mazur)83.8%Not measuredOnly Gemini 2.5 Pro measured
LMArena Text14581372Gemini 2.5 Pro
LMArena Text: instruction following14371362Gemini 2.5 Pro
LMArena Text: creative writing14541315Gemini 2.5 Pro
LMArena Vision12631196Gemini 2.5 Pro
LMArena Text: English14581381Gemini 2.5 Pro
LMArena Text: non-English14521359Gemini 2.5 Pro
LMArena Text: Chinese15071391Gemini 2.5 Pro
LMArena Text: German14871368Gemini 2.5 Pro
LMArena Text: Japanese14611343Gemini 2.5 Pro
LMArena Text: Korean14341321Gemini 2.5 Pro
LMArena Text: French14731395Gemini 2.5 Pro
LMArena Text: Spanish14741371Gemini 2.5 Pro
LMArena Text: Russian14611363Gemini 2.5 Pro
LMArena Text: Polish14791366Gemini 2.5 Pro
LMArena Text: multi-turn14531382Gemini 2.5 Pro
LMArena Text: longer queries14491365Gemini 2.5 Pro
LMArena Text: writing and language14541338Gemini 2.5 Pro
LMArena Text: entertainment and media14411325Gemini 2.5 Pro
LMArena Vision: English12611202Gemini 2.5 Pro
LMArena Vision: Chinese13001232Gemini 2.5 Pro
LMArena Vision: reading text12701204Gemini 2.5 Pro
LMArena Vision: humor12621161Gemini 2.5 Pro
LMArena Vision: captioning1304Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: recognizing things12831141Gemini 2.5 Pro
LMArena Vision: creative writing12651159Gemini 2.5 Pro
LMArena Document1421Not measuredOnly Gemini 2.5 Pro 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 Gemini 2.5 Pro and GPT-5.4 Nano
BenchmarkGemini 2.5 ProGPT-5.4 NanoLeader
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

Gemini 2.5 Pro$0.0063Fits in one request
GPT-5.4 Nano$0.0008Fits in one request

GPT-5.4 Nano costs less

Repository review

50K input + 3K output tokens

Gemini 2.5 Pro$0.092Fits in one request
GPT-5.4 Nano$0.014Fits in one request

GPT-5.4 Nano costs less

Agent loop

200K input + 10K output tokens

Gemini 2.5 Pro$0.350Fits in one request
GPT-5.4 Nano$0.052Fits in one request

GPT-5.4 Nano 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 Gemini 2.5 Pro and GPT-5.4 Nano
SpecificationGoogle Gemini 2.5 ProOpenAI GPT-5.4 Nano
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedJune 17, 2025March 17, 2026
Context window1.05M400K
Input $/Mtok$1.25$0.20
Output $/Mtok$10.00$1.25
Coding index19.144.8
Independent measurements behind it32
Cost per solved task$0.64$0.14
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 2.5 Pro better than GPT-5.4 Nano for coding?

Pick GPT-5.4 Nano for coding: it scores 44.8 on the Vibe Coding Index against 19.1 for Gemini 2.5 Pro, though on 2 benchmarks against 3. Pick Gemini 2.5 Pro for a larger context window (1.05M against 400K tokens) and work measured by WeirdML or LMArena Text: coding, where it leads.

Which is cheaper, Gemini 2.5 Pro or GPT-5.4 Nano?

Gemini 2.5 Pro costs $1.25 per million input tokens and $10.00 per million output tokens; GPT-5.4 Nano costs $0.20 and $1.25. Per solved SWE-bench Verified task, Gemini 2.5 Pro costs $0.64 and GPT-5.4 Nano $0.14.

Which has the bigger context window, Gemini 2.5 Pro or GPT-5.4 Nano?

Gemini 2.5 Pro, with 1.05M tokens against 400K.

How many benchmarks is the Gemini 2.5 Pro vs GPT-5.4 Nano comparison based on?

66 benchmarks have a result for both models as of October 21, 2026. Gemini 2.5 Pro's coding index rests on 3 independent benchmarks and GPT-5.4 Nano's on 2. Where only one model has a result, the page says so instead of naming a winner.

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