Claude Fable 5 vs Claude Sonnet 4
Compare Claude Fable 5 and Claude Sonnet 4, both from Anthropic, context windows of 1.0M vs 200K, tested across 53 shared challenges. Updated June 2026.
Which is better, Claude Fable 5 or Claude Sonnet 4?
Claude Fable 5 and Claude Sonnet 4 are both competitive models. Claude Fable 5 costs $10/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 1000K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Fable 5 and Claude Sonnet 4
Claude Fable 5 is made by anthropic while Claude Sonnet 4 is from anthropic. Claude Fable 5 has a 1000K token context window compared to Claude Sonnet 4's 200K. On pricing, Claude Fable 5 costs $10/M input tokens vs $3/M for Claude Sonnet 4.
Per 1M tokens
Claude Sonnet 4 is cheaper on both — 3.3× input, 3.3× output
No community votes yet. On paper, Claude Fable 5 has the edge — bigger model tier, newer, bigger context window.
Claude Sonnet 4 is 3.3x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Sonnet 4 uses 6.9x more transitions
