The Lab · Written in the open · Tagged GPT-5.5

Lab.

Working notes from the studio. The tools I build, the workflows I keep, the mistakes I paid for.

1 entries · latest 2026-06-10

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RAXXO Studios 7 min read

Claude Fable 5 vs GPT-5.5 vs Gemini 3.1 Pro: Who Leads Now?

SWE-Bench Pro: Claude Fable 5 hits 80.3 percent, GPT-5.5 lands 58.6, Gemini 3.1 Pro 54.2 Gemini stays cheapest at 2 dollars per million input, Fable 5 costs 10 but undercuts GPT-5.5 Pro Only Anthropic ships a two-tier safety design: risky...

AI ToolsClaudeGeminiGPT-5.5
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Claude Fable 5 vs GPT-5.5 vs Gemini 3.1 Pro: Who Leads Now?

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