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GPT-4 Turbo vs GPT-5 Nano

GPT-5 Nano leads GPT-4 Turbo on the Artificial Analysis Intelligence Index, 13.0 to 7.0, and GPT-5 Nano costs 75.0x less per output token ($0.40 vs $30.00 per million). Updated October 22, 2026; 39 benchmarks have a result for both.

Replace GPT-4 Turbo Replace GPT-5 Nano
GPT-4 TurboOpenAI
Coding
No data
Overall
No data
Output $/M
$30.00
3
GPT-5 NanoOpenAI
Coding
No data
Overall
35.6
Output $/M
$0.40
36
vs boards won of 39 shared

GPT-4 Turbo or GPT-5 Nano: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick GPT-4 Turbo for work measured by LiveCodeBench (Artificial Analysis run) or LMArena Text: coding, where it leads.

Model AGPT-4 TurboOpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-5 NanoOpenAINot benchmarkedNo coding benchmark$0.109 per solved task
Shared results
39
GPT-4 Turbo only
3
GPT-5 Nano only
48
Like-for-like categories
6 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-4 Turbo not benchmarked, GPT-5 Nano not benchmarked.
Widest category
Coding, 25.5 points apart on average over 3 shared benchmarks.
Widest single gap
LiveCodeBench (Artificial Analysis run): GPT-4 Turbo 29.1% against GPT-5 Nano 78.9%, 49.8 points apart on a 0 to 100 scale.
Output price
GPT-4 Turbo $30.00 against GPT-5 Nano $0.40 per million output tokens, 75.0x apart.
Context window
GPT-4 Turbo takes 128K tokens, GPT-5 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
CategoryGPT-4 TurboBarsGPT-5 NanoTies
Coding03
Intelligence02
Reasoning04
Math02
Knowledge16
General219
All shared boards336
CodingLike-for-likeSix of these boards feed the Vibe Coding Index03
Coding benchmarks for GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 NanoLeader
SWE-bench VerifiedNot measured34.8%Only GPT-5 Nano measured
AA Coding Index21.5Not measuredOnly GPT-4 Turbo measured
LiveCodeBench (Vals AI)Not measured70.2%Only GPT-5 Nano measured
LiveCodeBench (Artificial Analysis run)29.1%78.9%GPT-5 Nano
Terminal-Bench Hard (Artificial Analysis run)Not measured17.4%Only GPT-5 Nano measured
Terminal-BenchNot measured21.8%Only GPT-5 Nano measured
WeirdMLNot measured38.1%Only GPT-5 Nano measured
LMArena Text: coding12681351GPT-5 Nano
LMArena Text: software and IT12671345GPT-5 Nano
Neither model has a result on the other 30 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 NanoLeader
AA Intelligence Index7.013.0GPT-5 Nano
Epoch Capabilities Index127.3139.2GPT-5 Nano
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Agentic work benchmarks for GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 NanoLeader
τ²-Bench TelecomNot measured36.5%Only GPT-5 Nano measured
Berkeley Function Calling Leaderboard (BFCL)Not measured51.4%Only GPT-5 Nano measured
Neither model has a result on the other 39 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index04
Reasoning benchmarks for GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 NanoLeader
GPQA DiamondNot measured63.4%Only GPT-5 Nano measured
MMMU Pro (Vals AI)Not measured70.9%Only GPT-5 Nano measured
GPQA Diamond (Artificial Analysis run)Not measured67.6%Only GPT-5 Nano measured
Humanity's Last Exam (Artificial Analysis run)3.1%9.5%GPT-5 Nano
GPQA Diamond (Epoch AI run)Not measured69.4%Only GPT-5 Nano measured
ARC-AGINot measured20.7%Only GPT-5 Nano measured
ARC-AGI-2Not measured2.6%Only GPT-5 Nano measured
Chess puzzlesNot measured22.0%Only GPT-5 Nano measured
Mystery game puzzlesNot measured9.0%Only GPT-5 Nano measured
VPCTNot measured37.2%Only GPT-5 Nano measured
LMArena Text: hard prompts12511328GPT-5 Nano
LMArena Text: expert12231321GPT-5 Nano
LMArena Text: hard prompts in English12661338GPT-5 Nano
LMArena Vision: diagramsNot measured1141Only GPT-5 Nano measured
LMArena Vision: homeworkNot measured1157Only GPT-5 Nano measured
Kagi LLM BenchmarkNot measured62.2%Only GPT-5 Nano measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 NanoLeader
AIMENot measured81.2%Only GPT-5 Nano measured
MATH 500 (Vals AI)Not measured93.8%Only GPT-5 Nano measured
MGSM (Vals AI)Not measured89.3%Only GPT-5 Nano measured
AA Math IndexNot measured83.7Only GPT-5 Nano measured
AIME 2025 (Artificial Analysis run)Not measured83.7%Only GPT-5 Nano measured
OTIS Mock AIMENot measured81.1%Only GPT-5 Nano measured
FrontierMath, tiers 1 to 3Not measured20.0%Only GPT-5 Nano measured
FrontierMath, tier 4Not measured2.4%Only GPT-5 Nano measured
ProofBenchNot measured12.0%Only GPT-5 Nano measured
MATH level 5Not measured95.2%Only GPT-5 Nano measured
LMArena Text: math12721317GPT-5 Nano
LMArena Text: mathematical work12681326GPT-5 Nano
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index16
Knowledge benchmarks for GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 NanoLeader
MMLU ProNot measured76.1%Only GPT-5 Nano measured
LegalBench (Vals AI)80.5%50.1%GPT-4 Turbo
CaseLaw (Vals AI)Not measured52.6%Only GPT-5 Nano measured
TaxEval (Vals AI)Not measured67.4%Only GPT-5 Nano measured
MortgageTax (Vals AI)Not measured53.6%Only GPT-5 Nano measured
MedQA (Vals AI)82.0%93.3%GPT-5 Nano
MedCode (Vals AI)Not measured30.4%Only GPT-5 Nano measured
MMLU Pro (Artificial Analysis run)69.4%78.0%GPT-5 Nano
SimpleQA VerifiedNot measured11.7%Only GPT-5 Nano measured
MMLU81.3%Not measuredOnly GPT-4 Turbo measured
LMArena Text: science12561318GPT-5 Nano
LMArena Text: medicine and healthcare12391335GPT-5 Nano
LMArena Text: legal and government12651298GPT-5 Nano
LMArena Text: business and finance12221311GPT-5 Nano
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 GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 NanoLeader
Design Arena: websitesNot measured1101Only GPT-5 Nano measured
Design Arena: UI componentsNot measured1064Only GPT-5 Nano measured
Design Arena: game devNot measured1044Only GPT-5 Nano measured
Design Arena: data vizNot measured1056Only GPT-5 Nano measured
Design Arena: 3DNot measured965Only GPT-5 Nano measured
Design Arena: all code categoriesNot measured1084Only GPT-5 Nano measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index219
General benchmarks for GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 NanoLeader
SAGE (Vals AI)Not measured30.4%Only GPT-5 Nano measured
MedScribe (Vals AI)Not measured72.9%Only GPT-5 Nano measured
IFBenchNot measured67.6%Only GPT-5 Nano measured
Long context reasoning (AA-LCR)Not measured45.0%Only GPT-5 Nano measured
DTBench61.6%62.7%GPT-5 Nano
LMCA9.8%7.9%GPT-4 Turbo
Fiction.LiveBenchNot measured44.4%Only GPT-5 Nano measured
LMArena Text12721320GPT-5 Nano
LMArena Text: instruction following12491306GPT-5 Nano
LMArena Text: creative writing12681249GPT-4 Turbo
LMArena Vision10901159GPT-5 Nano
LMArena Text: English12911321GPT-5 Nano
LMArena Text: non-English12451313GPT-5 Nano
LMArena Text: Chinese12421356GPT-5 Nano
LMArena Text: German12591327GPT-5 Nano
LMArena Text: Japanese11941227GPT-5 Nano
LMArena Text: Korean11871269GPT-5 Nano
LMArena Text: French1276Not measuredOnly GPT-4 Turbo measured
LMArena Text: Spanish12601360GPT-5 Nano
LMArena Text: Russian12591296GPT-5 Nano
LMArena Text: Polish13021314GPT-5 Nano
LMArena Text: multi-turn12671311GPT-5 Nano
LMArena Text: longer queries12541312GPT-5 Nano
LMArena Text: writing and language12791283GPT-5 Nano
LMArena Text: entertainment and media12581268GPT-5 Nano
LMArena Vision: English10971170GPT-5 Nano
LMArena Vision: Chinese10451176GPT-5 Nano
LMArena Vision: reading textNot measured1152Only GPT-5 Nano measured
LMArena Vision: humorNot measured1110Only GPT-5 Nano measured
Neither model has a result on the other 17 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-4 Turbo and GPT-5 Nano
BenchmarkGPT-4 TurboGPT-5 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

GPT-4 Turbo$0.025Fits in one request
GPT-5 Nano$0.0003Fits in one request

GPT-5 Nano costs less

Repository review

50K input + 3K output tokens

GPT-4 Turbo$0.590Fits in one request
GPT-5 Nano$0.0037Fits in one request

GPT-5 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-4 Turbo$2.30Exceeds the context window
GPT-5 Nano$0.014Fits in one request

GPT-5 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 GPT-4 Turbo and GPT-5 Nano
SpecificationOpenAI GPT-4 TurboOpenAI GPT-5 Nano
MakerOpenAIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedApril 9, 2024August 7, 2025
Context window128K400K
Input $/Mtok$10.00$0.05
Output $/Mtok$30.00$0.40
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computable$0.109
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4 Turbo better than GPT-5 Nano for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GPT-4 Turbo for work measured by LiveCodeBench (Artificial Analysis run) or LMArena Text: coding, where it leads.

Which is cheaper, GPT-4 Turbo or GPT-5 Nano?

GPT-4 Turbo costs $10.00 per million input tokens and $30.00 per million output tokens; GPT-5 Nano costs $0.05 and $0.40. Cost per solved task is known for GPT-5 Nano only.

Which has the bigger context window, GPT-4 Turbo or GPT-5 Nano?

GPT-5 Nano, with 400K tokens against 128K.

How many benchmarks is the GPT-4 Turbo vs GPT-5 Nano comparison based on?

39 benchmarks have a result for both models as of October 22, 2026. GPT-4 Turbo's coding index rests on 0 independent benchmarks and GPT-5 Nano's on 0. Where only one model has a result, the page says so instead of naming a winner.

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