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GPT-4 Turbo vs gpt-oss-120b

gpt-oss-120b leads GPT-4 Turbo on the Artificial Analysis Intelligence Index, 11.6 to 7.0, and gpt-oss-120b costs 60.0x less per output token ($0.50 vs $30.00 per million). Updated October 22, 2026; 38 benchmarks have a result for both.

Replace GPT-4 Turbo Replace gpt-oss-120b
GPT-4 TurboOpenAI
Coding
No data
Overall
No data
Output $/M
$30.00
1
gpt-oss-120bOpenAI
Coding
No data
Overall
50.0
Output $/M
$0.50
37
vs boards won of 38 shared

GPT-4 Turbo or gpt-oss-120b: 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 AA Coding Index or LiveCodeBench (Artificial Analysis run), where it leads.

Model AGPT-4 TurboOpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel Bgpt-oss-120bOpenAINot benchmarked1 independent benchmark$0.51 per solved task
Shared results
38
GPT-4 Turbo only
4
gpt-oss-120b only
43
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-oss-120b not benchmarked.
Widest category
Coding, 26.5 points apart on average over 4 shared benchmarks.
Widest single gap
LiveCodeBench (Artificial Analysis run): GPT-4 Turbo 29.1% against gpt-oss-120b 87.8%, 58.7 points apart on a 0 to 100 scale.
Output price
GPT-4 Turbo $30.00 against gpt-oss-120b $0.50 per million output tokens, 60.0x apart.
Context window
GPT-4 Turbo takes 128K tokens, gpt-oss-120b 131K.

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-oss-120bTies
Coding04
Intelligence02
Reasoning04
Math02
Knowledge16
General019
All shared boards137
CodingLike-for-likeSix of these boards feed the Vibe Coding Index04
Coding benchmarks for GPT-4 Turbo and gpt-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
Aider polyglotNot measured41.8%Only gpt-oss-120b measured
SWE-bench VerifiedNot measured26.0%Only gpt-oss-120b measured
AA Coding Index21.530.4gpt-oss-120b
LiveCodeBench (Vals AI)Not measured83.2%Only gpt-oss-120b measured
SWE-bench Verified (Vals AI)Not measured33.6%Only gpt-oss-120b measured
LiveCodeBench (Artificial Analysis run)29.1%87.8%gpt-oss-120b
SciCodeNot measured34.0%Only gpt-oss-120b measured
Terminal-Bench Hard (Artificial Analysis run)Not measured23.5%Only gpt-oss-120b measured
Terminal-BenchNot measured18.7%Only gpt-oss-120b measured
WeirdMLNot measured48.2%Only gpt-oss-120b measured
ALE-BenchNot measured575.6Only gpt-oss-120b measured
LMArena Text: coding12681379gpt-oss-120b
LMArena Text: software and IT12671387gpt-oss-120b
SciCodeNot measured7.7%Only gpt-oss-120b measured
Neither model has a result on the other 25 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4 Turbo and gpt-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
AA Intelligence Index7.011.6gpt-oss-120b
Epoch Capabilities Index127.3139.8gpt-oss-120b
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Agentic work benchmarks for GPT-4 Turbo and gpt-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
AA Agentic IndexNot measured3.7Only gpt-oss-120b measured
τ²-Bench TelecomNot measured65.8%Only gpt-oss-120b measured
APEX-AgentsNot measured4.4%Only gpt-oss-120b measured
METR time horizonsNot measured56.6%Only gpt-oss-120b measured
Vending-Bench 2Not measured-$22Only gpt-oss-120b measured
BrowseComp-PlusNot measured67.0%Only gpt-oss-120b measured
Neither model has a result on the other 35 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index04
Reasoning benchmarks for GPT-4 Turbo and gpt-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
GPQA DiamondNot measured78.5%Only gpt-oss-120b measured
GPQA Diamond (Artificial Analysis run)Not measured78.2%Only gpt-oss-120b measured
Humanity's Last Exam (Artificial Analysis run)3.1%19.6%gpt-oss-120b
GPQA Diamond (Epoch AI run)Not measured75.8%Only gpt-oss-120b measured
SimpleBenchNot measured22.1%Only gpt-oss-120b measured
Mystery game puzzlesNot measured2.0%Only gpt-oss-120b measured
LMArena Text: hard prompts12511364gpt-oss-120b
LMArena Text: expert12231356gpt-oss-120b
LMArena Text: hard prompts in English12661368gpt-oss-120b
Kagi LLM BenchmarkNot measured58.6%Only gpt-oss-120b measured
Neither model has a result on the other 12 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for GPT-4 Turbo and gpt-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
AIMENot measured92.6%Only gpt-oss-120b measured
MATH 500 (Vals AI)Not measured94.8%Only gpt-oss-120b measured
MGSM (Vals AI)Not measured92.0%Only gpt-oss-120b measured
AA Math IndexNot measured93.4Only gpt-oss-120b measured
AIME 2025 (Artificial Analysis run)Not measured93.4%Only gpt-oss-120b measured
OTIS Mock AIMENot measured88.9%Only gpt-oss-120b measured
LMArena Text: math12721389gpt-oss-120b
LMArena Text: mathematical work12681386gpt-oss-120b
Neither model has a result on the other 5 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index16
Knowledge benchmarks for GPT-4 Turbo and gpt-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
MMLU ProNot measured79.2%Only gpt-oss-120b measured
LegalBench (Vals AI)80.5%75.9%GPT-4 Turbo
CaseLaw (Vals AI)Not measured48.8%Only gpt-oss-120b measured
CorpFin (Vals AI)Not measured58.2%Only gpt-oss-120b measured
TaxEval (Vals AI)Not measured71.6%Only gpt-oss-120b measured
MedQA (Vals AI)82.0%91.4%gpt-oss-120b
MMLU Pro (Artificial Analysis run)69.4%80.8%gpt-oss-120b
MMLU81.3%Not measuredOnly GPT-4 Turbo measured
LMArena Text: science12561382gpt-oss-120b
LMArena Text: medicine and healthcare12391388gpt-oss-120b
LMArena Text: legal and government12651355gpt-oss-120b
LMArena Text: business and finance12221359gpt-oss-120b
Neither model has a result on the other 6 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-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
Design Arena: websitesNot measured968Only gpt-oss-120b measured
Design Arena: UI componentsNot measured924Only gpt-oss-120b measured
Design Arena: game devNot measured992Only gpt-oss-120b measured
Design Arena: data vizNot measured987Only gpt-oss-120b measured
Design Arena: 3DNot measured900Only gpt-oss-120b measured
Design Arena: all code categoriesNot measured962Only gpt-oss-120b measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index019
General benchmarks for GPT-4 Turbo and gpt-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
IFBenchNot measured69.0%Only gpt-oss-120b measured
Long context reasoning (AA-LCR)Not measured52.0%Only gpt-oss-120b measured
DTBench61.6%76.3%gpt-oss-120b
LMCA9.8%22.1%gpt-oss-120b
Fiction.LiveBenchNot measured44.4%Only gpt-oss-120b measured
Creative writing (Lech Mazur)Not measured77.1%Only gpt-oss-120b measured
Surface Evolver BenchNot measured25.0%Only gpt-oss-120b measured
LMArena Text12721366gpt-oss-120b
LMArena Text: instruction following12491318gpt-oss-120b
LMArena Text: creative writing12681274gpt-oss-120b
LMArena Vision1090Not measuredOnly GPT-4 Turbo measured
LMArena Text: English12911375gpt-oss-120b
LMArena Text: non-English12451351gpt-oss-120b
LMArena Text: Chinese12421385gpt-oss-120b
LMArena Text: German12591353gpt-oss-120b
LMArena Text: Japanese11941331gpt-oss-120b
LMArena Text: Korean11871282gpt-oss-120b
LMArena Text: French12761370gpt-oss-120b
LMArena Text: Spanish12601389gpt-oss-120b
LMArena Text: Russian12591343gpt-oss-120b
LMArena Text: Polish13021353gpt-oss-120b
LMArena Text: multi-turn12671340gpt-oss-120b
LMArena Text: longer queries12541319gpt-oss-120b
LMArena Text: writing and language12791306gpt-oss-120b
LMArena Text: entertainment and media12581292gpt-oss-120b
LMArena Vision: English1097Not measuredOnly GPT-4 Turbo measured
LMArena Vision: Chinese1045Not measuredOnly GPT-4 Turbo measured
Neither model has a result on the other 19 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-oss-120b
BenchmarkGPT-4 Turbogpt-oss-120bLeader
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-oss-120b$0.0003Fits in one request

gpt-oss-120b costs less

Repository review

50K input + 3K output tokens

GPT-4 Turbo$0.590Fits in one request
gpt-oss-120b$0.0065Fits in one request

gpt-oss-120b costs less

Agent loop

200K input + 10K output tokens

GPT-4 Turbo$2.30Exceeds the context window
gpt-oss-120b$0.025Exceeds the context window

gpt-oss-120b 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-oss-120b
SpecificationOpenAI GPT-4 TurboOpenAI gpt-oss-120b
MakerOpenAIOpenAI
WeightsNo public weights listedOpen weights
ReleasedApril 9, 2024August 5, 2025
Context window128K131K
Input $/Mtok$10.00$0.10
Output $/Mtok$30.00$0.50
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it01
Cost per solved taskNot computable$0.51
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4 Turbo better than gpt-oss-120b 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 AA Coding Index or LiveCodeBench (Artificial Analysis run), where it leads.

Which is cheaper, GPT-4 Turbo or gpt-oss-120b?

GPT-4 Turbo costs $10.00 per million input tokens and $30.00 per million output tokens; gpt-oss-120b costs $0.10 and $0.50. Cost per solved task is known for gpt-oss-120b only.

Which has the bigger context window, GPT-4 Turbo or gpt-oss-120b?

gpt-oss-120b, with 131K tokens against 128K.

How many benchmarks is the GPT-4 Turbo vs gpt-oss-120b comparison based on?

38 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-oss-120b's on 1. Where only one model has a result, the page says so instead of naming a winner.

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