AnthropicClaude Fable 5VSOpenAIGPT-5 mini
Our Take
We recommend Claude Fable 5 if you need peak intelligence for reasoning and coding tasks, or the 29.1x cheaper GPT-5 mini to optimize your budget for high-volume pipelines. While Claude Fable 5 holds a clear performance lead, it carries a heavy price premium. Choose Claude Fable 5 for complex logic, or GPT-5 mini for budget efficiency.
▶WHY?
Benchmark Calculations & Evidence:
Coding Benchmarks: Both models were evaluated on the SWE-bench Pro benchmark. Claude Fable 5 scored 80.3%, while GPT-5 mini scored 45.7%.
Reasoning Benchmarks: Both models were evaluated on the GPQA Diamond benchmark. Claude Fable 5 scored 94.1%, while GPT-5 mini scored 81.6%.
Cost Efficiency: GPT-5 mini pricing ($0.25/M input, $2/M output) is 29.1x cheaper than Claude Fable 5 ($10/M input, $50/M output).
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Benchmarks & Scores
Coding (swe-bench-pro)Winner (+34.6%)
80.3%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)Winner (+12.5%)
94.1%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$20.00Input: $10.00 | Output: $50.00Context WindowLarger
1.05M tokensBenchmarks & Scores
Coding (swe-bench-pro)
45.7%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)
81.6%graduate-level science QA
Cost & Context
Cost (per 1M tokens)29.1x cheaper
$0.69Input: $0.25 | Output: $2.00Context Window
400k tokensFrequently Asked Questions about Claude Fable 5 vs GPT-5 mini
GPT-5 mini is cheaper than Claude Fable 5. GPT-5 mini has a blended cost of $0.69/1M tokens, which is about 29.1x cheaper than Claude Fable 5 at $20.00/1M tokens.
Claude Fable 5 is better for coding tasks on this benchmark. It scores 80.3% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning) compared to GPT-5 mini which scores 45.7%.
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