Claude Fable 5 vs GPT-5.4 Pro
Compare Claude Fable 5 by Anthropic against GPT-5.4 Pro by OpenAI, context windows of 1.0M vs 1.1M, tested across 18 shared challenges. Updated June 2026.
Which is better, Claude Fable 5 or GPT-5.4 Pro?
Claude Fable 5 and GPT-5.4 Pro are both competitive models. Claude Fable 5 costs $10/M input tokens vs $30/M for GPT-5.4 Pro. Context windows: 1000K vs 1050K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Fable 5 and GPT-5.4 Pro
Claude Fable 5 is made by anthropic while GPT-5.4 Pro is from openai. Claude Fable 5 has a 1000K token context window compared to GPT-5.4 Pro's 1050K. On pricing, Claude Fable 5 costs $10/M input tokens vs $30/M for GPT-5.4 Pro.
Per 1M tokens
Claude Fable 5 is cheaper on both — 3.0× input, 3.6× output
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Claude Fable 5 is 3.6x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Fable 5 uses 58.2x more emoji
