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Command A vs GPT-5 Nano

Updated October 21, 2026. 52 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Command A Replace GPT-5 Nano
Command ACohere
Coding
No data
Overall
13.1
Output $/M
$10.00
27
GPT-5 NanoOpenAI
Coding
No data
Overall
13.0
Output $/M
$0.40
25
vs boards won of 52 shared

Decision reading

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

Command A has the edge where what matters is LiveCodeBench (Vals AI) or LiveCodeBench (Artificial Analysis run), where it leads.

Model ACommand ACohereNot benchmarked1 independent benchmark$2.69 per solved taskModel BGPT-5 NanoOpenAINot benchmarkedNo coding benchmark$0.109 per solved task
Shared results
52
Command A only
8
GPT-5 Nano only
33
Like-for-like categories
7 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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
Command A not benchmarked, GPT-5 Nano not benchmarked.
Widest category
Agentic work, 44.2 points apart on average over 1 shared benchmark.
Widest single gap
AA Math Index: Command A 13.0 against GPT-5 Nano 83.7, 70.7 points apart on a 0 to 100 scale.
Output price
Command A $10.00 against GPT-5 Nano $0.40 per million output tokens, 25.0x apart.
Context window
Command A takes 256K 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
CategoryCommand ABarsGPT-5 NanoTies
Coding14
Intelligence10
Agentic work10
Reasoning24
Math07
Knowledge56
General174
All shared boards2725
CodingLike-for-likeSix of these boards feed the Vibe Coding Index14
Coding benchmarks for Command A and GPT-5 Nano
BenchmarkCommand AGPT-5 NanoLeader
SWE-bench VerifiedNot measured34.8%Only GPT-5 Nano measured
AA Coding Index27.8Not measuredOnly Command A measured
LiveCodeBench (Vals AI)35.1%70.2%GPT-5 Nano
SWE-bench Verified (Vals AI)7.8%Not measuredOnly Command A measured
Terminal-Bench 2.1 (Vals AI)17.6%Not measuredOnly Command A measured
LiveCodeBench (Artificial Analysis run)28.7%78.9%GPT-5 Nano
SciCode38.5%Not measuredOnly Command A measured
Terminal-Bench Hard (Artificial Analysis run)25.0%17.4%Command A
Terminal-BenchNot measured21.8%Only GPT-5 Nano measured
WeirdMLNot measured38.1%Only GPT-5 Nano measured
LMArena Text: coding13301351GPT-5 Nano
LMArena Text: software and IT13361345GPT-5 Nano
Neither model has a result on the other 26 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Command A and GPT-5 Nano
BenchmarkCommand AGPT-5 NanoLeader
AA Intelligence Index13.113.0Command A
Epoch Capabilities IndexNot measured139.2Only GPT-5 Nano measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Command A and GPT-5 Nano
BenchmarkCommand AGPT-5 NanoLeader
AA Agentic Index1.0Not measuredOnly Command A measured
Finance Agent (Vals AI)9.0%Not measuredOnly Command A measured
τ²-Bench Telecom80.7%36.5%Command A
Neither model has a result on the other 36 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index24
Reasoning benchmarks for Command A and GPT-5 Nano
BenchmarkCommand AGPT-5 NanoLeader
GPQA Diamond48.5%63.4%GPT-5 Nano
MMMU Pro (Vals AI)Not measured70.9%Only GPT-5 Nano measured
GPQA Diamond (Artificial Analysis run)76.1%67.6%Command A
Humanity's Last Exam (Artificial Analysis run)12.0%9.5%Command A
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 prompts13261328GPT-5 Nano
LMArena Text: expert12961321GPT-5 Nano
LMArena Text: hard prompts in English13351338GPT-5 Nano
LMArena Vision: diagramsNot measured1141Only GPT-5 Nano measured
LMArena Vision: homeworkNot measured1157Only 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 index07
Math benchmarks for Command A and GPT-5 Nano
BenchmarkCommand AGPT-5 NanoLeader
AIME13.3%81.2%GPT-5 Nano
MATH 500 (Vals AI)76.2%93.8%GPT-5 Nano
MGSM (Vals AI)85.7%89.3%GPT-5 Nano
AA Math Index13.083.7GPT-5 Nano
AIME 2025 (Artificial Analysis run)13.0%83.7%GPT-5 Nano
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: math13001317GPT-5 Nano
LMArena Text: mathematical work13121326GPT-5 Nano
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index56
Knowledge benchmarks for Command A and GPT-5 Nano
BenchmarkCommand AGPT-5 NanoLeader
MMLU Pro69.2%76.1%GPT-5 Nano
LegalBench (Vals AI)79.7%50.1%Command A
CaseLaw (Vals AI)64.5%52.6%Command A
CorpFin (Vals AI)46.0%Not measuredOnly Command A measured
TaxEval (Vals AI)61.4%67.4%GPT-5 Nano
MortgageTax (Vals AI)Not measured53.6%Only GPT-5 Nano measured
MedQA (Vals AI)80.5%93.3%GPT-5 Nano
MedCode (Vals AI)19.7%30.4%GPT-5 Nano
MMLU Pro (Artificial Analysis run)71.2%78.0%GPT-5 Nano
SimpleQA VerifiedNot measured11.7%Only GPT-5 Nano measured
LMArena Text: science13391318Command A
LMArena Text: medicine and healthcare13341335GPT-5 Nano
LMArena Text: legal and government13481298Command A
LMArena Text: business and finance13151311Command A
Neither model has a result on the other 3 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for Command A and GPT-5 Nano
BenchmarkCommand AGPT-5 NanoLeader
Design Arena: websitesNot measured1101Only GPT-5 Nano measured
Design Arena: UI componentsNot measured1067Only GPT-5 Nano measured
Design Arena: game devNot measured1045Only GPT-5 Nano measured
Design Arena: data vizNot measured1056Only GPT-5 Nano measured
Design Arena: 3DNot measured966Only 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 index174
General benchmarks for Command A and GPT-5 Nano
BenchmarkCommand AGPT-5 NanoLeader
SAGE (Vals AI)Not measured30.4%Only GPT-5 Nano measured
MedScribe (Vals AI)55.7%72.9%GPT-5 Nano
IFBench73.9%67.6%Command A
Long context reasoning (AA-LCR)52.7%45.0%Command A
DTBench61.3%62.7%GPT-5 Nano
LMCA10.3%7.9%Command A
Fiction.LiveBenchNot measured44.4%Only GPT-5 Nano measured
LMArena Text13311320Command A
LMArena Text: instruction following13091306Command A
LMArena Text: creative writing13191249Command A
LMArena VisionNot measured1159Only GPT-5 Nano measured
LMArena Text: English13441321Command A
LMArena Text: non-English13131313Command A
LMArena Text: Chinese13271356GPT-5 Nano
LMArena Text: German13421327Command A
LMArena Text: Japanese12851227Command A
LMArena Text: Korean12851269Command A
LMArena Text: French1351Not measuredOnly Command A measured
LMArena Text: Spanish13471360GPT-5 Nano
LMArena Text: Russian13141296Command A
LMArena Text: Polish13241314Command A
LMArena Text: multi-turn13381311Command A
LMArena Text: longer queries13341312Command A
LMArena Text: writing and language13281283Command A
LMArena Text: entertainment and media13061268Command A
LMArena Vision: EnglishNot measured1170Only GPT-5 Nano measured
LMArena Vision: ChineseNot measured1176Only GPT-5 Nano measured
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 Command A and GPT-5 Nano
BenchmarkCommand AGPT-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

Command A$0.0075Fits in one request
GPT-5 Nano$0.0003Fits in one request

GPT-5 Nano costs less

Repository review

50K input + 3K output tokens

Command A$0.155Fits in one request
GPT-5 Nano$0.0037Fits in one request

GPT-5 Nano costs less

Agent loop

200K input + 10K output tokens

Command A$0.600Fits in one request
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 Command A and GPT-5 Nano
SpecificationCohere Command AOpenAI GPT-5 Nano
MakerCohereOpenAI
WeightsOpen weightsNo public weights listed
ReleasedMarch 13, 2025August 7, 2025
Context window256K400K
Input $/Mtok$2.50$0.05
Output $/Mtok$10.00$0.40
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it10
Cost per solved task$2.69$0.109
SourceOpenRouter listingOpenRouter listing

Questions

Is Command A better than GPT-5 Nano for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Command A has the edge where what matters is LiveCodeBench (Vals AI) or LiveCodeBench (Artificial Analysis run), where it leads.

Which is cheaper, Command A or GPT-5 Nano?

Command A costs $2.50 per million input tokens and $10.00 per million output tokens; GPT-5 Nano costs $0.05 and $0.40. Per solved SWE-bench Verified task, Command A costs $2.69 and GPT-5 Nano $0.109.

Which has the bigger context window, Command A or GPT-5 Nano?

GPT-5 Nano, with 400K tokens against 256K.

How many benchmarks is the Command A vs GPT-5 Nano comparison based on?

52 benchmarks have a result for both models as of October 21, 2026. Command A's coding index rests on 1 independent benchmark 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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