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Claude Fable 5 vs GPT-6.1 Sol

Updated October 21, 2026. 83 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Fable 5 Replace GPT-6.1 Sol
Claude Fable 5Anthropic
Coding
82.1
Overall
49.6
Output $/M
$50.00
50
GPT-6.1 SolOpenAI
Coding
88.7
Overall
51.8
Output $/M
$10.00
31
vs boards won of 83 shared, 2 tied

Decision reading

Pick GPT-6.1 Sol for coding: it scores 88.7 on the Vibe Coding Index against 82.1 for Claude Fable 5.

Pick Claude Fable 5 when what matters is LiveBench coding or Vibe Code Bench (Vals AI), where it leads.

Model AClaude Fable 5Anthropic82.1/1002 independent benchmarks$2.16 per solved taskModel BGPT-6.1 SolOpenAI88.7/1002 independent benchmarksNo cost per solved task
Shared results
83
Claude Fable 5 only
43
GPT-6.1 Sol only
12
Like-for-like categories
8 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
Claude Fable 5 82.1 from 2 benchmarks, GPT-6.1 Sol 88.7 from 2 benchmarks.
Widest category
Agentic work, 11.2 points apart on average over 10 shared benchmarks.
Widest single gap
Furniture assembly: Claude Fable 5 35.8% against GPT-6.1 Sol 80.0%, 44.2 points apart on a 0 to 100 scale.
Output price
Claude Fable 5 $50.00 against GPT-6.1 Sol $10.00 per million output tokens, 5.0x apart.
Context window
Claude Fable 5 takes 1M tokens, GPT-6.1 Sol 1.05M.

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
CategoryClaude Fable 5BarsGPT-6.1 SolTies
Coding68
Intelligence02
Agentic work82
Reasoning661 tie
Math231 tie
Knowledge51
Web design25
General214
All shared boards50312 ties
CodingLike-for-likeFour of these boards feed the Vibe Coding Index68
Coding benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
LiveBench coding98.3%96.0%Claude Fable 5
LMArena WebDev16241753GPT-6.1 Sol
AA Coding Index76.5Not measuredOnly Claude Fable 5 measured
LiveCodeBench (Vals AI)89.8%Not measuredOnly Claude Fable 5 measured
SWE-bench Verified (Vals AI)95.0%Not measuredOnly Claude Fable 5 measured
Terminal-Bench 4 (Vals AI)41.4%55.0%GPT-6.1 Sol
Vibe Code Bench (Vals AI)90.3%88.9%Claude Fable 5
Code migration (Vals AI)55.1%65.1%GPT-6.1 Sol
ProgramBench (Vals AI)2.0%3.0%GPT-6.1 Sol
IOI (Vals AI)Not measured96.9%Only GPT-6.1 Sol measured
Terminal-Bench 2.1 (Vals AI)80.5%Not measuredOnly Claude Fable 5 measured
SWE-bench Multimodal (Vals AI)Not measured43.5%Only GPT-6.1 Sol measured
CyberBench (Vals AI)Not measured39.3%Only GPT-6.1 Sol measured
SciCode61.0%55.8%Claude Fable 5
Terminal-Bench Hard (Artificial Analysis run)62.9%Not measuredOnly Claude Fable 5 measured
FrontierCode53.5%50.2%Claude Fable 5
FrontierSWE47.0%Not measuredOnly Claude Fable 5 measured
GSO-Bench78.4%Not measuredOnly Claude Fable 5 measured
WeirdML91.9%Not measuredOnly Claude Fable 5 measured
MirrorCode63.9%Not measuredOnly Claude Fable 5 measured
ALE-Bench2041.32743.8GPT-6.1 Sol
LMArena Text: coding15181478Claude Fable 5
LMArena Text: software and IT15131476Claude Fable 5
LMArena WebDev: React16311754GPT-6.1 Sol
LMArena WebDev: HTML16511800GPT-6.1 Sol
LMArena WebDev: from an image16231702GPT-6.1 Sol
Neither model has a result on the other 12 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
AA Intelligence Index49.651.8GPT-6.1 Sol
Epoch Capabilities Index163.4168.4GPT-6.1 Sol
Agentic workLike-for-likePublic boards, shown as published, kept out of the index82
Agentic work benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
AA Agentic Index50.7Not measuredOnly Claude Fable 5 measured
Design Arena: agents building web apps1261Not measuredOnly Claude Fable 5 measured
Design Arena: agents building full-stack apps1280Not measuredOnly Claude Fable 5 measured
Design Arena: agents building mobile apps12641190Claude Fable 5
Design Arena: agents building Android apps1289Not measuredOnly Claude Fable 5 measured
Design Arena: agents building Godot games1292Not measuredOnly Claude Fable 5 measured
Design Arena: agents building games1285Not measuredOnly Claude Fable 5 measured
Design Arena: HTML slides1277Not measuredOnly Claude Fable 5 measured
Design Arena: PowerPoint slides1295Not measuredOnly Claude Fable 5 measured
Design Arena: spreadsheetsNot measured1250Only GPT-6.1 Sol measured
LiveBench research86.9%83.5%Claude Fable 5
LiveBench browser92.0%88.0%Claude Fable 5
LiveBench long agentic53.2%73.0%GPT-6.1 Sol
SREBench (Vals AI)Not measured50.8%Only GPT-6.1 Sol measured
Finance Agent (Vals AI)56.3%52.0%Claude Fable 5
Tax Agent Bench (Vals AI)38.3%21.8%Claude Fable 5
Legal Research Bench (Vals AI)49.5%38.5%Claude Fable 5
Harvey's Legal Agent Benchmark (Vals AI)Not measured6.3%Only GPT-6.1 Sol measured
Excel Modeling Benchmark (Vals AI)73.7%70.8%Claude Fable 5
BioMysteryBench (Vals AI)Not measured79.6%Only GPT-6.1 Sol measured
Terminal-Bench-Science (Vals AI)15.7%52.9%GPT-6.1 Sol
Vals Science IndexNot measured59.6%Only GPT-6.1 Sol measured
Robo-bench (Vals AI)Not measured28.3%Only GPT-6.1 Sol measured
τ²-Bench Telecom98.5%Not measuredOnly Claude Fable 5 measured
APEX-Agents63.6%60.0%Claude Fable 5
Remote Labor Index16.1%Not measuredOnly Claude Fable 5 measured
PostTrainBench41.8%Not measuredOnly Claude Fable 5 measured
SpireClimbNot measured24.7%Only GPT-6.1 Sol measured
Vending-Bench 2$5,680Not measuredOnly Claude Fable 5 measured
LMArena Search1229Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 9 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index66
Reasoning benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
GPQA Diamond93.2%Not measuredOnly Claude Fable 5 measured
LiveBench reasoning89.7%92.6%GPT-6.1 Sol
MysteryMechanism (Vals AI)Not measured46.4%Only GPT-6.1 Sol measured
MMMU Pro (Vals AI)89.3%Not measuredOnly Claude Fable 5 measured
GPQA Diamond (Artificial Analysis run)92.6%Not measuredOnly Claude Fable 5 measured
Humanity's Last Exam (Artificial Analysis run)55.5%52.9%Claude Fable 5
GPQA Diamond (Epoch AI run)85.9%95.4%GPT-6.1 Sol
ARC-AGI98.5%98.5%Tie
ARC-AGI-289.2%94.2%GPT-6.1 Sol
SimpleBench81.9%Not measuredOnly Claude Fable 5 measured
Chess puzzles47.0%68.0%GPT-6.1 Sol
Mystery game puzzles52.0%80.0%GPT-6.1 Sol
EBR-bench39.5%54.3%GPT-6.1 Sol
LMArena Text: hard prompts15071463Claude Fable 5
LMArena Text: expert15341489Claude Fable 5
LMArena Text: hard prompts in English15091465Claude Fable 5
LMArena Vision: diagrams13571306Claude Fable 5
LMArena Vision: homework13611356Claude Fable 5
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index23
Math benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
OTIS Mock AIME100.0%100.0%Tie
FrontierMath, tiers 1 to 387.0%93.7%GPT-6.1 Sol
FrontierMath, tier 490.2%100.0%GPT-6.1 Sol
ProofBench95.0%99.0%GPT-6.1 Sol
LMArena Text: math15161489Claude Fable 5
LMArena Text: mathematical work15151513Claude Fable 5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index51
Knowledge benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
MMLU Pro91.5%Not measuredOnly Claude Fable 5 measured
LegalBench (Vals AI)88.6%Not measuredOnly Claude Fable 5 measured
CorpFin (Vals AI)71.8%Not measuredOnly Claude Fable 5 measured
TaxEval (Vals AI)76.9%Not measuredOnly Claude Fable 5 measured
MortgageTax (Vals AI)68.9%Not measuredOnly Claude Fable 5 measured
MedCode (Vals AI)56.1%48.8%Claude Fable 5
SimpleQA Verified70.7%73.9%GPT-6.1 Sol
LMArena Text: science15061444Claude Fable 5
LMArena Text: medicine and healthcare14801433Claude Fable 5
LMArena Text: legal and government14981471Claude Fable 5
LMArena Text: business and finance14801445Claude Fable 5
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index25
Web design benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
Design Arena: websites12961321GPT-6.1 Sol
Design Arena: UI components13181321GPT-6.1 Sol
Design Arena: game dev13361389GPT-6.1 Sol
Design Arena: data viz13041278Claude Fable 5
Design Arena: 3D13191461GPT-6.1 Sol
Design Arena: all code categories13101345GPT-6.1 Sol
Design Arena: SVG1302Not measuredOnly Claude Fable 5 measured
Design Arena: ASCII art1328Not measuredOnly Claude Fable 5 measured
LiveBench design84.7%82.1%Claude Fable 5
GeneralLike-for-likePublic boards, shown as published, kept out of the index214
General benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
Vals IndexNot measured63.9%Only GPT-6.1 Sol measured
LiveBench data analysis80.5%82.7%GPT-6.1 Sol
Public Benefits Bench (Vals AI)70.4%59.3%Claude Fable 5
SAGE (Vals AI)51.9%46.5%Claude Fable 5
MedScribe (Vals AI)88.5%86.5%Claude Fable 5
Vals Multimodal Index74.2%Not measuredOnly Claude Fable 5 measured
IFBench63.5%Not measuredOnly Claude Fable 5 measured
Long context reasoning (AA-LCR)82.3%84.0%GPT-6.1 Sol
DTBench98.4%96.5%Claude Fable 5
LMCA61.2%62.8%GPT-6.1 Sol
Surface Evolver Bench95.0%Not measuredOnly Claude Fable 5 measured
Furniture assembly35.8%80.0%GPT-6.1 Sol
LMArena Text14911443Claude Fable 5
LMArena Text: instruction following15021466Claude Fable 5
LMArena Text: creative writing14941425Claude Fable 5
LMArena Vision13251288Claude Fable 5
LMArena Text: English14981450Claude Fable 5
LMArena Text: non-English14821433Claude Fable 5
LMArena Text: Chinese15431487Claude Fable 5
LMArena Text: German1486Not measuredOnly Claude Fable 5 measured
LMArena Text: Japanese1504Not measuredOnly Claude Fable 5 measured
LMArena Text: Korean1487Not measuredOnly Claude Fable 5 measured
LMArena Text: French15051460Claude Fable 5
LMArena Text: Spanish14981439Claude Fable 5
LMArena Text: Russian15031457Claude Fable 5
LMArena Text: Polish1494Not measuredOnly Claude Fable 5 measured
LMArena Text: multi-turn15041442Claude Fable 5
LMArena Text: longer queries15101458Claude Fable 5
LMArena Text: writing and language15011444Claude Fable 5
LMArena Text: entertainment and media14821426Claude Fable 5
LMArena Vision: English13231274Claude Fable 5
LMArena Vision: Chinese1373Not measuredOnly Claude Fable 5 measured
LMArena Vision: reading text13371289Claude Fable 5
LMArena Vision: humor1341Not measuredOnly Claude Fable 5 measured
LMArena Vision: creative writing13381301Claude Fable 5
LMArena Document1496Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 10 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Fable 5 and GPT-6.1 Sol
BenchmarkClaude Fable 5GPT-6.1 SolLeader
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

Claude Fable 5$0.035Fits in one request
GPT-6.1 Sol$0.0070Fits in one request

GPT-6.1 Sol costs less

Repository review

50K input + 3K output tokens

Claude Fable 5$0.650Fits in one request
GPT-6.1 Sol$0.130Fits in one request

GPT-6.1 Sol costs less

Agent loop

200K input + 10K output tokens

Claude Fable 5$2.50Fits in one request
GPT-6.1 Sol$0.500Fits in one request

GPT-6.1 Sol 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 Claude Fable 5 and GPT-6.1 Sol
SpecificationAnthropic Claude Fable 5OpenAI GPT-6.1 Sol
MakerAnthropicOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedJune 9, 2026September 29, 2026
Context window1M1.05M
Input $/Mtok$10.00$2.00
Output $/Mtok$50.00$10.00
Coding index82.188.7
Independent measurements behind it22
Cost per solved task$2.16Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Fable 5 better than GPT-6.1 Sol for coding?

Pick GPT-6.1 Sol for coding: it scores 88.7 on the Vibe Coding Index against 82.1 for Claude Fable 5. Pick Claude Fable 5 when what matters is LiveBench coding or Vibe Code Bench (Vals AI), where it leads.

Which is cheaper, Claude Fable 5 or GPT-6.1 Sol?

Claude Fable 5 costs $10.00 per million input tokens and $50.00 per million output tokens; GPT-6.1 Sol costs $2.00 and $10.00. Cost per solved task is known for Claude Fable 5 only.

Which has the bigger context window, Claude Fable 5 or GPT-6.1 Sol?

GPT-6.1 Sol, with 1.05M tokens against 1M.

How many benchmarks is the Claude Fable 5 vs GPT-6.1 Sol comparison based on?

83 benchmarks have a result for both models as of October 21, 2026. Claude Fable 5's coding index rests on 2 independent benchmarks and GPT-6.1 Sol's on 2. Where only one model has a result, the page says so instead of naming a winner.

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