Claude Fable 5 vs GPT-4o-mini

Head-to-head technical comparison of intelligence, capabilities, and API pricing.

Claude Fable 5

Anthropic

AI Mastery Index96.4

LMSYS Arena1494

Technical (MMLU-Pro)95.6%

Cost per 1M Tokens$10

GPT-4o-mini

OpenAI

AI Mastery Index81

LMSYS Arena1270

Technical (MMLU-Pro)82%

Cost per 1M Tokens$0.15

Architect's Verdict

When comparing Claude Fable 5 and GPT-4o-mini, Claude Fable 5 edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, GPT-4o-mini offers a more economical API at $0.15 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.