Enter opens the highlighted result. Esc closes.

GPT-4 Turbo vs GPT-5.1

GPT-5.1 leads GPT-4 Turbo on the Artificial Analysis Intelligence Index, 24.7 to 7.0, and GPT-5.1 costs 3.0x less per output token ($10.00 vs $30.00 per million). Updated October 22, 2026; 41 benchmarks have a result for both.

Replace GPT-4 Turbo Replace GPT-5.1
GPT-4 TurboOpenAI
Coding
No data
Overall
No data
Output $/M
$30.00
0
GPT-5.1OpenAI
Coding
40.4
Overall
55.0
Output $/M
$10.00
41
vs boards won of 41 shared

GPT-4 Turbo or GPT-5.1: which to pick

Only GPT-5.1 has a coding score, 40.4 on the Vibe Coding Index; GPT-4 Turbo has none, so the two cannot be ranked on coding.

Compare them on price, context and the boards below.

Model AGPT-4 TurboOpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-5.1OpenAI40.4/1003 independent benchmarks$1.02 per solved task
Shared results
41
GPT-4 Turbo only
1
GPT-5.1 only
60
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-5.1 40.4 from 3 benchmarks.
Widest category
Coding, 36.9 points apart on average over 4 shared benchmarks.
Widest single gap
LiveCodeBench (Artificial Analysis run): GPT-4 Turbo 29.1% against GPT-5.1 86.8%, 57.7 points apart on a 0 to 100 scale.
Output price
GPT-4 Turbo $30.00 against GPT-5.1 $10.00 per million output tokens, 3.0x apart.
Context window
GPT-4 Turbo takes 128K tokens, GPT-5.1 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-5.1Ties
Coding04
Intelligence02
Reasoning04
Math02
Knowledge07
General022
All shared boards041
CodingLike-for-likeSix of these boards feed the Vibe Coding Index04
Coding benchmarks for GPT-4 Turbo and GPT-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
SWE-bench VerifiedNot measured66.0%Only GPT-5.1 measured
LMArena WebDevNot measured1396Only GPT-5.1 measured
AA Coding Index21.549.4GPT-5.1
LiveCodeBench (Vals AI)Not measured86.5%Only GPT-5.1 measured
SWE-bench Verified (Vals AI)Not measured69.8%Only GPT-5.1 measured
Vibe Code Bench (Vals AI)Not measured24.6%Only GPT-5.1 measured
LiveCodeBench (Artificial Analysis run)29.1%86.8%GPT-5.1
Terminal-Bench Hard (Artificial Analysis run)Not measured45.5%Only GPT-5.1 measured
Terminal-BenchNot measured47.6%Only GPT-5.1 measured
GSO-BenchNot measured13.7%Only GPT-5.1 measured
WeirdMLNot measured60.8%Only GPT-5.1 measured
LMArena Text: coding12681453GPT-5.1
LMArena Text: software and IT12671454GPT-5.1
LMArena WebDev: ReactNot measured1307Only GPT-5.1 measured
LMArena WebDev: HTMLNot measured1405Only GPT-5.1 measured
LMArena WebDev: from an imageNot measured1421Only GPT-5.1 measured
Neither model has a result on the other 23 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4 Turbo and GPT-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
AA Intelligence Index7.024.7GPT-5.1
Epoch Capabilities Index127.3149.8GPT-5.1
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index3 boards, none shared
Agentic work benchmarks for GPT-4 Turbo and GPT-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
τ²-Bench TelecomNot measured81.9%Only GPT-5.1 measured
DeepResearch BenchNot measured42.8%Only GPT-5.1 measured
Vending-Bench 2Not measured$1,473Only GPT-5.1 measured
Neither model has a result on the other 38 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index04
Reasoning benchmarks for GPT-4 Turbo and GPT-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
GPQA DiamondNot measured86.6%Only GPT-5.1 measured
MMMU Pro (Vals AI)Not measured83.2%Only GPT-5.1 measured
GPQA Diamond (Artificial Analysis run)Not measured87.3%Only GPT-5.1 measured
Humanity's Last Exam (Artificial Analysis run)3.1%28.5%GPT-5.1
GPQA Diamond (Epoch AI run)Not measured87.6%Only GPT-5.1 measured
ARC-AGINot measured72.8%Only GPT-5.1 measured
ARC-AGI-2Not measured17.6%Only GPT-5.1 measured
SimpleBenchNot measured53.2%Only GPT-5.1 measured
Chess puzzlesNot measured42.0%Only GPT-5.1 measured
Mystery game puzzlesNot measured19.0%Only GPT-5.1 measured
VPCTNot measured58.7%Only GPT-5.1 measured
LMArena Text: hard prompts12511457GPT-5.1
LMArena Text: expert12231470GPT-5.1
LMArena Text: hard prompts in English12661462GPT-5.1
LMArena Vision: diagramsNot measured1264Only GPT-5.1 measured
LMArena Vision: homeworkNot measured1272Only GPT-5.1 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-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
AIMENot measured93.3%Only GPT-5.1 measured
MGSM (Vals AI)Not measured93.0%Only GPT-5.1 measured
AA Math IndexNot measured94.0Only GPT-5.1 measured
AIME 2025 (Artificial Analysis run)Not measured94.0%Only GPT-5.1 measured
OTIS Mock AIMENot measured88.6%Only GPT-5.1 measured
LMArena Text: math12721446GPT-5.1
LMArena Text: mathematical work12681449GPT-5.1
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index07
Knowledge benchmarks for GPT-4 Turbo and GPT-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
MMLU ProNot measured86.4%Only GPT-5.1 measured
LegalBench (Vals AI)80.5%85.7%GPT-5.1
CaseLaw (Vals AI)Not measured73.4%Only GPT-5.1 measured
CorpFin (Vals AI)Not measured63.8%Only GPT-5.1 measured
TaxEval (Vals AI)Not measured74.9%Only GPT-5.1 measured
MortgageTax (Vals AI)Not measured61.4%Only GPT-5.1 measured
MedQA (Vals AI)82.0%96.4%GPT-5.1
MedCode (Vals AI)Not measured52.7%Only GPT-5.1 measured
MMLU Pro (Artificial Analysis run)69.4%87.0%GPT-5.1
SimpleQA VerifiedNot measured48.0%Only GPT-5.1 measured
MMLU81.3%Not measuredOnly GPT-4 Turbo measured
LMArena Text: science12561459GPT-5.1
LMArena Text: medicine and healthcare12391456GPT-5.1
LMArena Text: legal and government12651459GPT-5.1
LMArena Text: business and finance12221431GPT-5.1
FACTS Benchmark SuiteNot measured45.0%Only GPT-5.1 measured
Neither model has a result on the other 2 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for GPT-4 Turbo and GPT-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
Design Arena: websitesNot measured1187Only GPT-5.1 measured
Design Arena: UI componentsNot measured1163Only GPT-5.1 measured
Design Arena: game devNot measured1178Only GPT-5.1 measured
Design Arena: data vizNot measured1204Only GPT-5.1 measured
Design Arena: 3DNot measured1060Only GPT-5.1 measured
Design Arena: all code categoriesNot measured1170Only GPT-5.1 measured
Design Arena: SVGNot measured1149Only GPT-5.1 measured
Design Arena: ASCII artNot measured1119Only GPT-5.1 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index022
General benchmarks for GPT-4 Turbo and GPT-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
SAGE (Vals AI)Not measured43.2%Only GPT-5.1 measured
MedScribe (Vals AI)Not measured88.1%Only GPT-5.1 measured
IFBenchNot measured72.9%Only GPT-5.1 measured
Long context reasoning (AA-LCR)Not measured80.0%Only GPT-5.1 measured
DTBench61.6%90.1%GPT-5.1
LMCA9.8%43.9%GPT-5.1
CL-benchNot measured23.7%Only GPT-5.1 measured
CL-bench LifeNot measured17.3%Only GPT-5.1 measured
LMArena Text12721443GPT-5.1
LMArena Text: instruction following12491443GPT-5.1
LMArena Text: creative writing12681427GPT-5.1
LMArena Vision10901250GPT-5.1
LMArena Text: English12911451GPT-5.1
LMArena Text: non-English12451431GPT-5.1
LMArena Text: Chinese12421495GPT-5.1
LMArena Text: German12591438GPT-5.1
LMArena Text: Japanese11941453GPT-5.1
LMArena Text: Korean11871401GPT-5.1
LMArena Text: French12761450GPT-5.1
LMArena Text: Spanish12601433GPT-5.1
LMArena Text: Russian12591435GPT-5.1
LMArena Text: Polish13021440GPT-5.1
LMArena Text: multi-turn12671450GPT-5.1
LMArena Text: longer queries12541448GPT-5.1
LMArena Text: writing and language12791428GPT-5.1
LMArena Text: entertainment and media12581415GPT-5.1
LMArena Vision: English10971252GPT-5.1
LMArena Vision: Chinese10451270GPT-5.1
LMArena Vision: reading textNot measured1255Only GPT-5.1 measured
LMArena Vision: humorNot measured1263Only GPT-5.1 measured
LMArena Vision: captioningNot measured1252Only GPT-5.1 measured
LMArena Vision: recognizing thingsNot measured1232Only GPT-5.1 measured
LMArena Vision: creative writingNot measured1266Only GPT-5.1 measured
LMArena DocumentNot measured1403Only GPT-5.1 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-4 Turbo and GPT-5.1
BenchmarkGPT-4 TurboGPT-5.1Leader
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-5.1$0.0063Fits in one request

GPT-5.1 costs less

Repository review

50K input + 3K output tokens

GPT-4 Turbo$0.590Fits in one request
GPT-5.1$0.092Fits in one request

GPT-5.1 costs less

Agent loop

200K input + 10K output tokens

GPT-4 Turbo$2.30Exceeds the context window
GPT-5.1$0.350Fits in one request

GPT-5.1 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-5.1
SpecificationOpenAI GPT-4 TurboOpenAI GPT-5.1
MakerOpenAIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedApril 9, 2024November 13, 2025
Context window128K400K
Input $/Mtok$10.00$1.25
Output $/Mtok$30.00$10.00
Coding indexNot benchmarked40.4
Independent measurements behind it03
Cost per solved taskNot computable$1.02
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4 Turbo better than GPT-5.1 for coding?

Only GPT-5.1 has a coding score, 40.4 on the Vibe Coding Index; GPT-4 Turbo has none, so the two cannot be ranked on coding. Compare them on price, context and the boards below.

Which is cheaper, GPT-4 Turbo or GPT-5.1?

GPT-4 Turbo costs $10.00 per million input tokens and $30.00 per million output tokens; GPT-5.1 costs $1.25 and $10.00. Cost per solved task is known for GPT-5.1 only.

Which has the bigger context window, GPT-4 Turbo or GPT-5.1?

GPT-5.1, with 400K tokens against 128K.

How many benchmarks is the GPT-4 Turbo vs GPT-5.1 comparison based on?

41 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-5.1's on 3. Where only one model has a result, the page says so instead of naming a winner.

Compare next