Versions side by side — rows that differ across these models are highlighted.
| API string | gemini-3.1-pro | — | claude-opus-4-8 |
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| Note | Current flagship; 2M-token context window (largest production context of any model family), strong coding/reasoning/multimodal. GA February 2026. | First Gemini 3 model, released in preview; introduced improved agentic capabilities. Superseded by Gemini 3.1 Pro GA. | Designated current flagship; reliability-focused Opus (4x less likely than 4.7 to let its own code flaws pass). 1M context, $5/$25, effort levels through xhigh/max, Fast mode at $10/$50. Guide positions Fable 5 one tier above it. |
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