PyyanThe AI Index

Pyyan / Compare / Gemini 3.8 Flash vs Claude Fable 5

Gemini 3.8 Flash vs Claude Fable 5

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Language Models · verified 5 Sept 2026

Gemini 3.8 FlashGooglecurrent
Claude Fable 5Anthropiccurrent
3 slots left
SpecificationGemini 3.8 FlashClaude Fable 5
Summary$0.75 per million in, until the introductory rate ends on 1 January.Most capable widely released model, for the hardest reasoning and long-horizon agentic work.
Context1M1M
Input ($/Mtok)$0.75$10
Output ($/Mtok)$3.75$50
LicenceProprietaryProprietary
Max output64K128K
ParametersNot published—
Released2 Sep 2026—
Model IDgemini-3.8-flashclaude-fable-5
CategoryLanguage ModelsLanguage Models
Official—Anthropic ↗

Highlighted rows are where these differ.

Gemini 3.8 Flash

  • Introductory pricing runs to 31 December 2026, then input and output both double
  • A separate Flash Cyber twin clears 70% on real world vulnerability discovery
  • Flash Cyber is reachable only through the Fairwind Program, by application

Best for high volume work at low cost.

Full spec sheet →

Claude Fable 5

  • Thinking is always on — the `thinking` param is rejected
  • Raw chain of thought is never returned
  • Requires 30-day data retention; unavailable under ZDR

Best for the hardest problems.

Full spec sheet →