Claude Fable 5 vs Gemini 2.5 Flash Preview 05-20 (thinking)
Compare Claude Fable 5 by Anthropic against Gemini 2.5 Flash Preview 05-20 (thinking) by Google AI, context windows of 1.0M vs 1.0M, tested across 11 shared challenges.
Our Verdict
Claude Fable 5
Gemini 2.5 Flash Preview 05-20 (thinking)Runner-up
No community votes yet. On paper, Claude Fable 5 has the edge — bigger model tier, newer.
Gemini 2.5 Flash Preview 05-20 (thinking) is 14x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Fable 5
Input
$10.00
Output
$50.00
Gemini 2.5 Flash Preview 05-20 (thinking)
Input
$0.15
67× cheaper
Output
$3.50
14× cheaper
Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper on both — 67× input, 14× output
Writing DNA
Style Comparison
Similarity
52%
Claude Fable 5 uses 49.4x more hedging
Claude Fable 5
Gemini 2.5 Flash Preview 05-20 (thinking)
60%Vocabulary70%
22wSentence Length11w
0.49Hedging0.00
4.0Bold4.2
3.5Lists7.3
0.58Emoji0.00
1.09Headings0.00
0.05Transitions0.00
Based on 27 + 3 text responses
Research
What we learned reading every model
FAQ
