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GPT-6 Sol vs Grok 4.5

GPT-6 Sol leads Grok 4.5 on coding, 76.0 to 58.6 on the Vibe Coding Index, and Grok 4.5 costs 1.7x less per output token ($6.00 vs $10.00 per million). Updated October 22, 2026; 93 benchmarks have a result for both.

Replace GPT-6 Sol Replace Grok 4.5
GPT-6 SolOpenAI
Coding
76.0
Overall
74.6
Output $/M
$10.00
50
Grok 4.5xAI
Coding
58.6
Overall
62.1
Output $/M
$6.00
43
vs boards won of 93 shared

GPT-6 Sol or Grok 4.5: which to pick

Pick GPT-6 Sol for coding: it scores 76.0 on the Vibe Coding Index against 58.6 for Grok 4.5, though on 5 benchmarks against 6.

Pick Grok 4.5 for output tokens 1.7x cheaper ($6.00 vs $10.00 per million) and work measured by LiveBench coding or LMArena Text: coding, where it leads.

Model AGPT-6 SolOpenAI76.0/1005 independent benchmarksNo cost per solved taskModel BGrok 4.5xAI58.6/1006 independent benchmarks$0.62 per solved task
Shared results
93
GPT-6 Sol only
8
Grok 4.5 only
30
Like-for-like categories
8 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-6 Sol 76.0 from 5 benchmarks, Grok 4.5 58.6 from 6 benchmarks.
Widest category
Math, 28.5 points apart on average over 6 shared benchmarks.
Widest single gap
Vending-Bench 2: GPT-6 Sol $14,428 against Grok 4.5 $3,887, 65.9 points apart on a 0 to 100 scale.
Output price
GPT-6 Sol $10.00 against Grok 4.5 $6.00 per million output tokens, 1.7x apart.
Context window
GPT-6 Sol takes 1.05M tokens, Grok 4.5 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-6 SolBarsGrok 4.5Ties
Coding143
Intelligence20
Agentic work76
Reasoning65
Math42
Knowledge34
Web design81
General622
All shared boards5043
CodingLike-for-likeSix of these boards feed the Vibe Coding Index143
Coding benchmarks for GPT-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
LiveBench coding93.1%94.3%Grok 4.5
LMArena WebDev16831553GPT-6 Sol
AA Coding IndexNot measured72.4Only Grok 4.5 measured
LiveCodeBench (Vals AI)Not measured87.3%Only Grok 4.5 measured
SWE-bench Verified (Vals AI)Not measured86.6%Only Grok 4.5 measured
Terminal-Bench 4 (Vals AI)44.4%8.6%GPT-6 Sol
Vibe Code Bench (Vals AI)87.8%69.0%GPT-6 Sol
Code migration (Vals AI)57.2%36.6%GPT-6 Sol
ProgramBench (Vals AI)2.0%0.0%GPT-6 Sol
IOI (Vals AI)82.6%40.6%GPT-6 Sol
Terminal-Bench 2.1 (Vals AI)83.2%67.8%GPT-6 Sol
SkillsBench (Vals AI)Not measured66.0%Only Grok 4.5 measured
CyberBench (Vals AI)78.0%71.0%GPT-6 Sol
SciCode57.6%55.0%GPT-6 Sol
FrontierCode49.3%42.4%GPT-6 Sol
WeirdMLNot measured46.4%Only Grok 4.5 measured
ALE-Bench2462.01309.3GPT-6 Sol
LMArena Text: coding14481474Grok 4.5
LMArena Text: software and IT14331471Grok 4.5
LMArena WebDev: React16851556GPT-6 Sol
LMArena WebDev: HTML16851567GPT-6 Sol
LMArena WebDev: from an image16601562GPT-6 Sol
SciCodeNot measured6.5%Only Grok 4.5 measured
Neither model has a result on the other 16 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for GPT-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
AA Intelligence Index47.638.8GPT-6 Sol
Epoch Capabilities Index163.7154.1GPT-6 Sol
Agentic workLike-for-likePublic boards, shown as published, kept out of the index76
Agentic work benchmarks for GPT-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
AA Agentic IndexNot measured41.2Only Grok 4.5 measured
Design Arena: agents building web apps12311218GPT-6 Sol
Design Arena: agents building full-stack apps12381249Grok 4.5
Design Arena: agents building mobile apps12171220Grok 4.5
Design Arena: agents building Android appsNot measured1236Only Grok 4.5 measured
Design Arena: agents building Godot gamesNot measured1229Only Grok 4.5 measured
Design Arena: agents building gamesNot measured1236Only Grok 4.5 measured
Design Arena: HTML slidesNot measured1205Only Grok 4.5 measured
Design Arena: PowerPoint slidesNot measured1230Only Grok 4.5 measured
LiveBench research69.3%85.9%Grok 4.5
LiveBench browser92.0%44.0%GPT-6 Sol
LiveBench long agentic66.9%27.9%GPT-6 Sol
SREBench (Vals AI)30.5%0.8%GPT-6 Sol
Finance Agent (Vals AI)49.0%48.4%GPT-6 Sol
Tax Agent Bench (Vals AI)15.0%24.9%Grok 4.5
Legal Research Bench (Vals AI)28.9%38.0%Grok 4.5
Excel Modeling Benchmark (Vals AI)71.5%52.9%GPT-6 Sol
BioMysteryBench (Vals AI)74.8%Not measuredOnly GPT-6 Sol measured
Terminal-Bench-Science (Vals AI)30.0%Not measuredOnly GPT-6 Sol measured
Vals Science Index45.0%Not measuredOnly GPT-6 Sol measured
Time Horizon Index (Vals AI)Not measured6.3%Only Grok 4.5 measured
APEX-Agents54.3%56.2%Grok 4.5
PostTrainBenchNot measured23.4%Only Grok 4.5 measured
SpireClimb7.5%Not measuredOnly GPT-6 Sol measured
Vending-Bench 2$14,428$3,887GPT-6 Sol
LMArena SearchNot measured1216Only Grok 4.5 measured
Neither model has a result on the other 15 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index65
Reasoning benchmarks for GPT-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
GPQA DiamondNot measured92.9%Only Grok 4.5 measured
LiveBench reasoning88.7%87.2%GPT-6 Sol
MysteryMechanism (Vals AI)30.2%Not measuredOnly GPT-6 Sol measured
MMMU Pro (Vals AI)Not measured61.8%Only Grok 4.5 measured
GPQA Diamond (Artificial Analysis run)Not measured93.1%Only Grok 4.5 measured
Humanity's Last Exam (Artificial Analysis run)47.9%42.7%GPT-6 Sol
GPQA Diamond (Epoch AI run)94.3%93.4%GPT-6 Sol
ARC-AGI95.5%87.2%GPT-6 Sol
ARC-AGI-289.6%52.6%GPT-6 Sol
SimpleBenchNot measured70.0%Only Grok 4.5 measured
Chess puzzles56.0%35.0%GPT-6 Sol
Mystery game puzzles56.0%Not measuredOnly GPT-6 Sol measured
EBR-bench53.3%Not measuredOnly GPT-6 Sol measured
LMArena Text: hard prompts14221462Grok 4.5
LMArena Text: expert14371465Grok 4.5
LMArena Text: hard prompts in English14201464Grok 4.5
LMArena Vision: diagrams12701304Grok 4.5
LMArena Vision: homework12861295Grok 4.5
Kagi LLM BenchmarkNot measured83.5%Only Grok 4.5 measured
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index42
Math benchmarks for GPT-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
OTIS Mock AIME100.0%97.8%GPT-6 Sol
FrontierMath, tiers 1 to 389.8%57.2%GPT-6 Sol
FrontierMath, tier 490.0%24.4%GPT-6 Sol
ProofBench83.0%31.0%GPT-6 Sol
LMArena Text: math14071460Grok 4.5
LMArena Text: mathematical work14241482Grok 4.5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index34
Knowledge benchmarks for GPT-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
MMLU ProNot measured89.2%Only Grok 4.5 measured
LegalBench (Vals AI)Not measured86.0%Only Grok 4.5 measured
CorpFin (Vals AI)Not measured67.4%Only Grok 4.5 measured
TaxEval (Vals AI)Not measured71.7%Only Grok 4.5 measured
MortgageTax (Vals AI)Not measured61.8%Only Grok 4.5 measured
MedCode (Vals AI)47.1%43.3%GPT-6 Sol
SimpleQA Verified60.7%48.3%GPT-6 Sol
LMArena Text: science13891464Grok 4.5
LMArena Text: medicine and healthcare13661440Grok 4.5
LMArena Text: legal and government13961463Grok 4.5
LMArena Text: business and finance13801441Grok 4.5
FACTS Benchmark Suite72.5%50.2%GPT-6 Sol
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index81
Web design benchmarks for GPT-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
Design Arena: websites12921281GPT-6 Sol
Design Arena: UI components12901280GPT-6 Sol
Design Arena: game dev13111264GPT-6 Sol
Design Arena: data viz12691266GPT-6 Sol
Design Arena: 3D13141257GPT-6 Sol
Design Arena: all code categories13001275GPT-6 Sol
Design Arena: SVG13151215GPT-6 Sol
Design Arena: ASCII art12221256Grok 4.5
LiveBench design82.2%78.1%GPT-6 Sol
GeneralLike-for-likePublic boards, shown as published, kept out of the index622
General benchmarks for GPT-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
LiveBench data analysis81.2%73.0%GPT-6 Sol
Public Benefits Bench (Vals AI)56.6%Not measuredOnly GPT-6 Sol measured
SAGE (Vals AI)44.8%35.0%GPT-6 Sol
MedScribe (Vals AI)82.0%86.9%Grok 4.5
Vals Multimodal IndexNot measured63.4%Only Grok 4.5 measured
Long context reasoning (AA-LCR)83.7%79.3%GPT-6 Sol
DTBench97.3%96.5%GPT-6 Sol
LMCA59.1%45.2%GPT-6 Sol
Surface Evolver BenchNot measured74.4%Only Grok 4.5 measured
Furniture assembly58.3%22.5%GPT-6 Sol
LMArena Text13981448Grok 4.5
LMArena Text: instruction following14131445Grok 4.5
LMArena Text: creative writing13781442Grok 4.5
LMArena Vision12401287Grok 4.5
LMArena Text: English13961453Grok 4.5
LMArena Text: non-English13881440Grok 4.5
LMArena Text: Chinese14121495Grok 4.5
LMArena Text: German13791448Grok 4.5
LMArena Text: Japanese13771430Grok 4.5
LMArena Text: Korean13361406Grok 4.5
LMArena Text: French13991457Grok 4.5
LMArena Text: Spanish13871451Grok 4.5
LMArena Text: Russian14021449Grok 4.5
LMArena Text: Polish13721432Grok 4.5
LMArena Text: multi-turn14141456Grok 4.5
LMArena Text: longer queries14161462Grok 4.5
LMArena Text: writing and language13891445Grok 4.5
LMArena Text: entertainment and media13731434Grok 4.5
LMArena Vision: English12291285Grok 4.5
LMArena Vision: ChineseNot measured1345Only Grok 4.5 measured
LMArena Vision: reading text12581293Grok 4.5
LMArena Vision: humorNot measured1276Only Grok 4.5 measured
LMArena Vision: creative writing12191293Grok 4.5
LMArena DocumentNot measured1452Only Grok 4.5 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-6 Sol and Grok 4.5
BenchmarkGPT-6 SolGrok 4.5Leader
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-6 Sol$0.0070Fits in one request
Grok 4.5$0.0050Fits in one request

Grok 4.5 costs less

Repository review

50K input + 3K output tokens

GPT-6 Sol$0.130Fits in one request
Grok 4.5$0.118Fits in one request

Grok 4.5 costs less

Agent loop

200K input + 10K output tokens

GPT-6 Sol$0.500Fits in one request
Grok 4.5$0.460Fits in one request

Grok 4.5 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-6 Sol and Grok 4.5
SpecificationOpenAI GPT-6 SolSpaceXAI Grok 4.5
MakerOpenAIxAI
WeightsNo public weights listedNo public weights listed
ReleasedSeptember 22, 2026July 8, 2026
Context window1.05M500K
Input $/Mtok$2.00$2.00
Output $/Mtok$10.00$6.00
Coding index76.058.6
Independent measurements behind it56
Cost per solved taskNot computable$0.62
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-6 Sol better than Grok 4.5 for coding?

Pick GPT-6 Sol for coding: it scores 76.0 on the Vibe Coding Index against 58.6 for Grok 4.5, though on 5 benchmarks against 6. Pick Grok 4.5 for output tokens 1.7x cheaper ($6.00 vs $10.00 per million) and work measured by LiveBench coding or LMArena Text: coding, where it leads.

Which is cheaper, GPT-6 Sol or Grok 4.5?

GPT-6 Sol costs $2.00 per million input tokens and $10.00 per million output tokens; Grok 4.5 costs $2.00 and $6.00. Cost per solved task is known for Grok 4.5 only.

Which has the bigger context window, GPT-6 Sol or Grok 4.5?

GPT-6 Sol, with 1.05M tokens against 500K.

How many benchmarks is the GPT-6 Sol vs Grok 4.5 comparison based on?

93 benchmarks have a result for both models as of October 22, 2026. GPT-6 Sol's coding index rests on 5 independent benchmarks and Grok 4.5's on 6. Where only one model has a result, the page says so instead of naming a winner.

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