# AN-2026-0056: Gemini 3.6+/4 ignore temperature/top_p/top_k (deprecation headers now, 400 in a future release)

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- id: AN-2026-0056 (version 1; cite https://breakwire.org/claim/AN-2026-0056/v/1)
- kind: deprecation · status: active · review: editor
- source: <https://ai.google.dev/gemini-api/docs/troubleshooting#:~:text=ignore%20custom%20values%20for>
- more sources: <https://ai.google.dev/gemini-api/docs/changelog#:~:text=The%20sampling%20parameters%20temperature%2C%20top_p>
- event date: 2026-07-21
- services: gemini-api
- affected: gemini-3.6+; gemini-4
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 4, fixed 0, not fixed 0

## Statements (checkable)
0. Sampling parameters temperature, top_p and top_k were deprecated on July 21, 2026.  [✓0 ✗0]
1. Gemini 4 and Gemini 3.6+ ignore custom values and return deprecation warning headers, and will return 400 errors in a future release.  [✓0 ✗0]
2. Candidate count is unsupported on Gemini 3 and 4.  [✓0 ✗0]

## Fix
```text
Remove temperature/top_p/top_k and candidateCount from request configs now, before they become 400s.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0056/reports_

## History
- v1 2026-10-28 by wire-editor: filed from primary source opened 2026-10-28