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GPT-5.4 Nano vs Grok 4.6

Grok 4.6 leads GPT-5.4 Nano on coding, 65.7 to 44.8 on the Vibe Coding Index, and GPT-5.4 Nano costs 4.8x less per output token ($1.25 vs $6.00 per million). Updated October 22, 2026; 76 benchmarks have a result for both.

Replace GPT-5.4 Nano Replace Grok 4.6
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
2
Grok 4.6xAI
Coding
65.7
Overall
67.4
Output $/M
$6.00
74
vs boards won of 76 shared

GPT-5.4 Nano or Grok 4.6: which to pick

Pick Grok 4.6 for coding: it scores 65.7 on the Vibe Coding Index against 44.8 for GPT-5.4 Nano.

Pick GPT-5.4 Nano for output tokens 4.8x cheaper ($1.25 vs $6.00 per million) and a lower cost per solved task ($0.14 against $0.82).

Model AGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved taskModel BGrok 4.6xAI65.7/1006 independent benchmarks$0.82 per solved task
Shared results
76
GPT-5.4 Nano only
9
Grok 4.6 only
47
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
GPT-5.4 Nano 44.8 from 2 benchmarks, Grok 4.6 65.7 from 6 benchmarks.
Widest category
Agentic work, 28.1 points apart on average over 5 shared benchmarks.
Widest single gap
ARC-AGI-2: GPT-5.4 Nano 5.7% against Grok 4.6 67.1%, 61.4 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Nano $1.25 against Grok 4.6 $6.00 per million output tokens, 4.8x apart.
Context window
GPT-5.4 Nano takes 400K tokens, Grok 4.6 500K.

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-5.4 NanoBarsGrok 4.6Ties
Coding011
Intelligence02
Agentic work05
Reasoning112
Math06
Knowledge011
General127
All shared boards274
CodingLike-for-likeSix of these boards feed the Vibe Coding Index011
Coding benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
LiveBench codingNot measured89.1%Only Grok 4.6 measured
LMArena WebDevNot measured1617Only Grok 4.6 measured
AA Coding Index56.176.8Grok 4.6
LiveCodeBench (Vals AI)84.0%88.2%Grok 4.6
SWE-bench Verified (Vals AI)69.8%95.6%Grok 4.6
Terminal-Bench 4 (Vals AI)Not measured17.2%Only Grok 4.6 measured
Vibe Code Bench (Vals AI)26.1%76.2%Grok 4.6
Code migration (Vals AI)14.5%44.6%Grok 4.6
ProgramBench (Vals AI)Not measured1.0%Only Grok 4.6 measured
IOI (Vals AI)Not measured47.6%Only Grok 4.6 measured
Terminal-Bench 2.1 (Vals AI)41.6%78.3%Grok 4.6
Vibe Code Bench 1-100 (Vals AI)Not measured14.8%Only Grok 4.6 measured
SkillsBench (Vals AI)Not measured55.8%Only Grok 4.6 measured
CyberBench (Vals AI)Not measured67.7%Only Grok 4.6 measured
SciCode47.2%56.5%Grok 4.6
Terminal-Bench Hard (Artificial Analysis run)42.4%Not measuredOnly GPT-5.4 Nano measured
FrontierCodeNot measured48.0%Only Grok 4.6 measured
FrontierSWENot measured25.3%Only Grok 4.6 measured
WeirdML49.2%67.3%Grok 4.6
ALE-Bench1004.51508.1Grok 4.6
LMArena Text: coding14041466Grok 4.6
LMArena Text: software and IT14021457Grok 4.6
LMArena WebDev: ReactNot measured1631Only Grok 4.6 measured
LMArena WebDev: HTMLNot measured1597Only Grok 4.6 measured
LMArena WebDev: from an imageNot measured1603Only Grok 4.6 measured
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
AA Intelligence Index20.744.3Grok 4.6
Epoch Capabilities Index146.0156.6Grok 4.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index05
Agentic work benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
AA Agentic Index16.053.0Grok 4.6
Design Arena: agents building web appsNot measured1248Only Grok 4.6 measured
Design Arena: agents building full-stack appsNot measured1264Only Grok 4.6 measured
Design Arena: agents building mobile appsNot measured1234Only Grok 4.6 measured
Design Arena: agents building Android appsNot measured1291Only Grok 4.6 measured
Design Arena: agents building Godot gamesNot measured1276Only Grok 4.6 measured
Design Arena: agents building gamesNot measured1209Only Grok 4.6 measured
Design Arena: HTML slidesNot measured1250Only Grok 4.6 measured
Design Arena: PowerPoint slidesNot measured1237Only Grok 4.6 measured
LiveBench researchNot measured84.5%Only Grok 4.6 measured
LiveBench browserNot measured64.0%Only Grok 4.6 measured
LiveBench long agenticNot measured40.7%Only Grok 4.6 measured
Finance Agent (Vals AI)38.2%53.7%Grok 4.6
Tax Agent Bench (Vals AI)5.0%33.1%Grok 4.6
Legal Research Bench (Vals AI)6.3%48.1%Grok 4.6
Excel Modeling Benchmark (Vals AI)44.8%62.7%Grok 4.6
BioMysteryBench (Vals AI)Not measured72.2%Only Grok 4.6 measured
Terminal-Bench-Science (Vals AI)Not measured11.4%Only Grok 4.6 measured
Vals Science IndexNot measured38.1%Only Grok 4.6 measured
Time Horizon Index (Vals AI)Not measured5.8%Only Grok 4.6 measured
τ²-Bench Telecom76.0%Not measuredOnly GPT-5.4 Nano measured
APEX-AgentsNot measured65.3%Only Grok 4.6 measured
Vending-Bench 2Not measured$9,047Only Grok 4.6 measured
Neither model has a result on the other 18 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index112
Reasoning benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
GPQA Diamond77.5%94.7%Grok 4.6
LiveBench reasoningNot measured91.2%Only Grok 4.6 measured
MysteryMechanism (Vals AI)Not measured30.6%Only Grok 4.6 measured
MMMU Pro (Vals AI)73.6%Not measuredOnly GPT-5.4 Nano measured
GPQA Diamond (Artificial Analysis run)81.7%94.9%Grok 4.6
Humanity's Last Exam (Artificial Analysis run)28.3%44.1%Grok 4.6
GPQA Diamond (Epoch AI run)78.5%94.0%Grok 4.6
ARC-AGI51.5%87.5%Grok 4.6
ARC-AGI-25.7%67.1%Grok 4.6
SimpleBenchNot measured75.9%Only Grok 4.6 measured
Chess puzzles45.0%33.0%GPT-5.4 Nano
Mystery game puzzles9.0%34.0%Grok 4.6
EBR-benchNot measured30.5%Only Grok 4.6 measured
LMArena Text: hard prompts13811448Grok 4.6
LMArena Text: expert13961469Grok 4.6
LMArena Text: hard prompts in English13871445Grok 4.6
LMArena Vision: diagrams12101285Grok 4.6
LMArena Vision: homework12251283Grok 4.6
Kagi LLM Benchmark39.7%Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index06
Math benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
AIME88.8%Not measuredOnly GPT-5.4 Nano measured
OTIS Mock AIME87.8%99.2%Grok 4.6
FrontierMath, tiers 1 to 344.9%66.0%Grok 4.6
FrontierMath, tier 412.2%31.7%Grok 4.6
ProofBench5.0%51.0%Grok 4.6
LMArena Text: math14051417Grok 4.6
LMArena Text: mathematical work14091464Grok 4.6
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index011
Knowledge benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
MMLU Pro77.2%89.4%Grok 4.6
LegalBench (Vals AI)77.9%86.3%Grok 4.6
CaseLaw (Vals AI)51.9%Not measuredOnly GPT-5.4 Nano measured
CorpFin (Vals AI)61.2%66.2%Grok 4.6
TaxEval (Vals AI)67.4%71.1%Grok 4.6
MortgageTax (Vals AI)59.1%64.2%Grok 4.6
MedCode (Vals AI)41.0%44.7%Grok 4.6
SimpleQA Verified11.7%49.3%Grok 4.6
LMArena Text: science13741437Grok 4.6
LMArena Text: medicine and healthcare13691420Grok 4.6
LMArena Text: legal and government13681429Grok 4.6
LMArena Text: business and finance13661416Grok 4.6
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Web design benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
Design Arena: websitesNot measured1289Only Grok 4.6 measured
Design Arena: UI componentsNot measured1294Only Grok 4.6 measured
Design Arena: game devNot measured1296Only Grok 4.6 measured
Design Arena: data vizNot measured1282Only Grok 4.6 measured
Design Arena: 3DNot measured1277Only Grok 4.6 measured
Design Arena: all code categoriesNot measured1292Only Grok 4.6 measured
Design Arena: SVGNot measured1240Only Grok 4.6 measured
Design Arena: ASCII artNot measured1279Only Grok 4.6 measured
LiveBench designNot measured79.8%Only Grok 4.6 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index127
General benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
LiveBench data analysisNot measured75.3%Only Grok 4.6 measured
Public Benefits Bench (Vals AI)Not measured66.8%Only Grok 4.6 measured
SAGE (Vals AI)38.1%28.9%GPT-5.4 Nano
MedScribe (Vals AI)77.1%86.5%Grok 4.6
Vals Multimodal Index47.6%Not measuredOnly GPT-5.4 Nano measured
IFBench75.9%Not measuredOnly GPT-5.4 Nano measured
Long context reasoning (AA-LCR)76.7%81.0%Grok 4.6
DTBench80.3%97.3%Grok 4.6
LMCA36.9%48.5%Grok 4.6
Furniture assemblyNot measured40.0%Only Grok 4.6 measured
LMArena Text13721429Grok 4.6
LMArena Text: instruction following13621431Grok 4.6
LMArena Text: creative writing13151426Grok 4.6
LMArena Vision11961263Grok 4.6
LMArena Text: English13811433Grok 4.6
LMArena Text: non-English13591420Grok 4.6
LMArena Text: Chinese13911476Grok 4.6
LMArena Text: German13681426Grok 4.6
LMArena Text: Japanese13431378Grok 4.6
LMArena Text: Korean13211391Grok 4.6
LMArena Text: French13951455Grok 4.6
LMArena Text: Spanish13711414Grok 4.6
LMArena Text: Russian13631421Grok 4.6
LMArena Text: Polish13661430Grok 4.6
LMArena Text: multi-turn13821425Grok 4.6
LMArena Text: longer queries13651456Grok 4.6
LMArena Text: writing and language13381429Grok 4.6
LMArena Text: entertainment and media13251421Grok 4.6
LMArena Vision: English12021270Grok 4.6
LMArena Vision: Chinese12321289Grok 4.6
LMArena Vision: reading text12041272Grok 4.6
LMArena Vision: humor11611270Grok 4.6
LMArena Vision: recognizing things1141Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: creative writing11591262Grok 4.6
LMArena DocumentNot measured1452Only Grok 4.6 measured
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-5.4 Nano and Grok 4.6
BenchmarkGPT-5.4 NanoGrok 4.6Leader
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-5.4 Nano$0.0008Fits in one request
Grok 4.6$0.0050Fits in one request

GPT-5.4 Nano costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Nano$0.014Fits in one request
Grok 4.6$0.118Fits in one request

GPT-5.4 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Nano$0.052Fits in one request
Grok 4.6$0.460Fits 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 GPT-5.4 Nano and Grok 4.6
SpecificationOpenAI GPT-5.4 NanoSpaceXAI Grok 4.6
MakerOpenAIxAI
WeightsNo public weights listedNo public weights listed
ReleasedMarch 17, 2026August 12, 2026
Context window400K500K
Input $/Mtok$0.20$2.00
Output $/Mtok$1.25$6.00
Coding index44.865.7
Independent measurements behind it26
Cost per solved task$0.14$0.82
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Nano better than Grok 4.6 for coding?

Pick Grok 4.6 for coding: it scores 65.7 on the Vibe Coding Index against 44.8 for GPT-5.4 Nano. Pick GPT-5.4 Nano for output tokens 4.8x cheaper ($1.25 vs $6.00 per million) and a lower cost per solved task ($0.14 against $0.82).

Which is cheaper, GPT-5.4 Nano or Grok 4.6?

GPT-5.4 Nano costs $0.20 per million input tokens and $1.25 per million output tokens; Grok 4.6 costs $2.00 and $6.00. Per solved SWE-bench Verified task, GPT-5.4 Nano costs $0.14 and Grok 4.6 $0.82.

Which has the bigger context window, GPT-5.4 Nano or Grok 4.6?

Grok 4.6, with 500K tokens against 400K.

How many benchmarks is the GPT-5.4 Nano vs Grok 4.6 comparison based on?

76 benchmarks have a result for both models as of October 22, 2026. GPT-5.4 Nano's coding index rests on 2 independent benchmarks and Grok 4.6's on 6. Where only one model has a result, the page says so instead of naming a winner.

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