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Align native Gemini reasoning with named thinking levels - #262

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codex/google-thinking-level

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@qduc qduc commented Nov 12, 2026

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Term2's named effort currently becomes a token budget even for current Gemini models, while Pi uses Google's named thinking levels. Send named levels for Gemini 3 Flash, 3.x Pro/Flash and 4+ IDs; retain budget behavior for older/unknown IDs and caller-owned thinkingConfig. Infer minimal as low conservatively and xhigh as high.

Native Gemini 4 Argon accepts the resulting LOW request without relay rewriting. The old budget request is also accepted; this change aligns the control and makes no cost or latency claim.

Validation: 15 real-SDK HTTP regressions (6 fail on base); independent 32-case SDK verification accepted. Final bounded full provider suite: 285 passed, 5 skipped; fake-Codex E2E: 18 passed; static guards, typecheck, lint and baseline gate pass. An earlier full run hit an image/retry composer timeout also reproduced on unchanged main; its logs remain retained. No successful live scenario was repeated.

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