Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.
shared result series
233
distinct benchmarks
25
latest retrieval
2026-09-04
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Specifications
General specifications
Release date, availability, context window, architecture, and published parameter counts at a glance. Undisclosed details remain marked as unavailable.
The table compares official standard API rates per 1M tokens, including published cache pricing. Batch, fast, priority, regional surcharges, tool calls, and cloud platform pricing are excluded.
Key to the marks:better valuebetter, but not conclusivetie
Pricing by provider
Direct developer pricing and provider endpoint tariffs routed through OpenRouter are listed separately. Prices are in USD per 1M tokens. Context-dependent direct tiers plus regional, Flex, Priority, and other OpenRouter tariffs remain individually identifiable.
Only published results with the same benchmark version, task, metric, and comparison cohort are paired. Different reasoning levels, agents, harnesses, or output limits appear directly in the table.
Capability profile from matched benchmarks
Each axis averages directly matched benchmark families. A value of 100 means the stronger value within this pair, not a universal quality score.
Claude Fable 5
GPT-5.5
Coding: 100 / 77.3 (6 benchmark families)
Reasoning: 99.9 / 97.9 (3 benchmark families)
Mathematics: 100 / 98.5 (1 benchmark family)
Knowledge: 100 / 96.9 (2 benchmark families)
Finance: 100 / 95.2 (6 benchmark families)
Legal: 100 / 77.8 (4 benchmark families)
Agentic tasks: 100 / 94.9 (1 benchmark family)
Multimodal: 100 / 98.8 (1 benchmark family)
62 matched rows from 25 benchmark families were considered. The radar shows 8 of 13 comparable categories.
Claude Fable 5GPT-5.5
Code MigrationOverall. Higher is better. No documented setup difference
Claude Fable 5Winner55.065 %
GPT-5.545.161 %
CorpFin v2Overall. Higher is better. No documented setup difference
Claude Fable 5Winner71.834 %
GPT-5.568.415 %
EMBOverall. Higher is better. No documented setup difference
Claude Fable 5Winner73.666 %
GPT-5.564.543 %
Finance Agent (v2)Overall. Higher is better. No documented setup difference
Claude Fable 5Winner56.314 %
GPT-5.551.76 %
GPQA DiamondOverall. Higher is better. No documented setup difference
Claude Fable 5Tie93.182 %
GPT-5.5Tie93.182 %
Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference
Claude Fable 5Winner11.25 %
GPT-5.53.75 %
Legal Research BenchOverall · All-pass. Higher is better. No documented setup difference
Claude Fable 5Winner49.519 %
GPT-5.540.385 %
LegalBenchOverall. Higher is better. No documented setup difference
Claude Fable 5Winner88.561 %
GPT-5.586.515 %
LiveBenchOverall. Higher is better. No documented setup difference
Claude Fable 5Winner82.97 points
GPT-5.580.19 points
LiveCodeBench v6Overall. Higher is better. No documented setup difference
Claude Fable 5Winner89.778 %
GPT-5.585.296 %
LMArena Text, Style ControlOverall. Higher is better. No documented setup difference
Claude Fable 5Winner1,507.405
GPT-5.51,477.235
MedCodeOverall. Higher is better. No documented setup difference
Claude Fable 5Winner56.07 %
GPT-5.549.1 %
Key to the marks:better valuebetter, but not conclusivetie
Benchmark scores for Claude Fable 5 and GPT-5.5
Benchmark and task
Claude Fable 5
GPT-5.5
Source
Code MigrationOverallTest details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
No documented difference in the test setupVersion: 2026-06-25Metric: composite scoreScoring: Higher is better23 objectively scored tasks across seven categories.
No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterClaude Fable 5: Snapshot: claude-fable-5, Harness: Arena text, style control GPT-5.5: Snapshot: gpt-5.5, Harness: Arena text, style controlClaude Fable 5: Style-controlled Arena rating from 26,977 anonymous pairwise votes.GPT-5.5: Style-controlled Arena rating from 64,686 anonymous pairwise votes.
Winner1,507.405
95% confidence interval: ±4.978The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,477.235
95% confidence interval: ±3.839The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
No documented difference in the test setupVersion: 2026-06-25Metric: category scoreScoring: Higher is betterAgentic coding category inside the same LiveBench release.
Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterClaude Fable 5: Snapshot: claude-fable-5, Harness: Arena text, style control GPT-5.5: Snapshot: gpt-5.5-high, Reasoning: high, Harness: Arena text, style controlClaude Fable 5: Style-controlled Arena rating from 26,977 anonymous pairwise votes.GPT-5.5: Style-controlled Arena rating from 63,265 anonymous pairwise votes.
Higher measured value1,507.405
95% confidence interval: ±4.978The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,482.334
95% confidence interval: ±3.856The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterGPT-5.5: Reasoning: high, Output limit: 128,000 tokens
No documented difference in the test setupVersion: 2026-06-25Metric: category scoreScoring: Higher is betterCoding category inside the same LiveBench release.
LMArena Text, Style ControlBusiness, management and financeTest details
No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterClaude Fable 5: Snapshot: claude-fable-5, Harness: Arena text, style control GPT-5.5: Snapshot: gpt-5.5, Harness: Arena text, style controlClaude Fable 5: Style-controlled Arena rating from 5,567 anonymous pairwise votes.GPT-5.5: Style-controlled Arena rating from 12,904 anonymous pairwise votes.
Winner1,501.942
95% confidence interval: ±8.642The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,485.915
95% confidence interval: ±6.577The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterGPT-5.5: Reasoning: high, Output limit: 128,000 tokens
Key to the marks:better valuebetter, but not conclusivetie
Our model tests
Community tests you can inspect
Compare how the models respond to the same prompt. Each test shows the first attempt, with no subsequent fixes to the generated code. These results do not contribute to an overall score.
Pelican on a bicycle
A community classic for free-form SVG drawing.
Claude Fable 5
A community classic for free-form SVG drawing.First attempt
Run date
7 Sept 2026
API provider
openrouter
Requested API model
anthropic/claude-fable-5
API model reported in response
anthropic/claude-fable-5
Pinned endpoint
Anthropic | anthropic/claude-5-fable-20260609
Reasoning setting
high
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Passed, not a quality rating
Response time
53.1 s
Visually reviewed. This individual test does not establish overall model quality.
GPT-5.5
The API response was not fully received. The model was not evaluated.
First attempt
Run date
7 Sept 2026
API provider
openrouter
Requested API model
openai/gpt-5.5
Pinned endpoint
OpenAI | openai/gpt-5.5-20260423
Reasoning setting
high
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Failed
Not yet visually reviewed. A successful recording does not confirm correct physics or full compliance with the prompt.
Your workload, budget, and required context length matter most. A coding benchmark says little about visual understanding or agent performance.
The standard price table uses direct developer rates. The provider comparison labels OpenRouter endpoints, regions, and special tariffs separately.
Every result links to its measurement source and retrieval date. Labels distinguish vendor reports, official benchmark leaderboards, and independent evaluations. Disputed or archived results are excluded.
More matchups
Related LLM comparisons
Compare Claude Fable 5 and GPT-5.5 with other leading models using the same data and benchmark logic.
