Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.
shared result series
112
distinct benchmarks
21
latest retrieval
2026-09-29
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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.
Specifications for Claude Fable 5 and GPT-5.4 mini
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.
Provider pricing for Claude Fable 5 and GPT-5.4 mini
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-5.4 mini
Coding: 100 / 48.8 (5 benchmark families)
Reasoning: 100 / 89.2 (1 benchmark family)
Knowledge: 100 / 92.4 (1 benchmark family)
Finance: 100 / 77.4 (6 benchmark families)
Legal: 100 / 12.6 (2 benchmark families)
Agentic tasks: 100 / 67.9 (1 benchmark family)
Multimodal: 100 / 88.7 (1 benchmark family)
Education: 100 / 97.9 (1 benchmark family)
22 matched rows from 20 benchmark families were considered. The radar shows 8 of 9 comparable categories.
Claude Fable 5GPT-5.4 mini
Code MigrationOverall. Higher is better. No documented setup difference
Claude Fable 5Winner55.065 %
GPT-5.4 mini12.936 %
CorpFin v2Overall. Higher is better. No documented setup difference
Claude Fable 5Winner71.834 %
GPT-5.4 mini60.917 %
EMBOverall. Higher is better. No documented setup difference
Claude Fable 5Winner73.666 %
GPT-5.4 mini45.426 %
Finance Agent (v2)Overall. Higher is better. No documented setup difference
Claude Fable 5Winner56.314 %
GPT-5.4 mini45.36 %
GPQA DiamondOverall. Higher is better. No documented setup difference
Claude Fable 5Winner93.182 %
GPT-5.4 mini83.08 %
Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference
Claude Fable 5Winner11.25 %
GPT-5.4 mini0 %
IOIIOI 2024. Higher is better. Test setup not documented as identical
Claude Fable 5Higher measured value100 %
GPT-5.4 mini6.667 %
Legal Research BenchOverall · All-pass. Higher is better. No documented setup difference
Claude Fable 5Winner49.519 %
GPT-5.4 mini12.5 %
LiveCodeBench v6Overall. Higher is better. No documented setup difference
Claude Fable 5Winner89.778 %
GPT-5.4 mini81.465 %
MMLU-ProOverall. Higher is better. No documented setup difference
Claude Fable 5Winner91.502 %
GPT-5.4 mini84.554 %
MMMU-ProOverall. Higher is better. No documented setup difference
Claude Fable 5Winner89.306 %
GPT-5.4 mini79.249 %
MortgageTaxOverall. Higher is better. No documented setup difference
Claude Fable 5Winner68.919 %
GPT-5.4 mini63.514 %
Key to the marks:better valuebetter, but not conclusivetie
Benchmark scores for Claude Fable 5 and GPT-5.4 mini
Benchmark and task
Claude Fable 5
GPT-5.4 mini
Source
Code MigrationOverallTest details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17
No documented difference in the test setupVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17
No documented difference in the test setupVersion: 2Metric: weighted index scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17
No documented difference in the test setupVersion: 1.2Metric: weighted index scoreScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17
No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Fable 5: Harness: OpenHands GPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Harness: OpenHands
Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: high, Output limit: 128,000 tokens
Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterGPT-5.4 mini: Snapshot: gpt-5.4-mini-2026-03-17, Reasoning: high, Output limit: 128,000 tokens
Key to the marks:better valuebetter, but not conclusivetie
Our model tests
Our tests
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.
Reasoning (requested): high
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
Reasoning setting
high
Pinned endpoint
Anthropic | anthropic/claude-5-fable-20260609
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-5.4 mini
The response reached the token limit. No complete recording is available.
Reasoning (requested): high
First attempt
Run date
7 Sept 2026
API provider
openrouter
Requested API model
openai/gpt-5.4-mini
API model reported in response
openai/gpt-5.4-mini
Reasoning setting
high
Pinned endpoint
OpenAI | openai/gpt-5.4-mini-20260317
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Failed
Response time
67 s
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-5.4 mini with other leading models using the same data and benchmark logic.
