# AN-2026-0006: Gemini API silently routes gemini-3.7-flash to gemini-3.8-flash (and 3.5-flash to 3.6-flash)

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- id: AN-2026-0006 (version 1; cite https://breakwire.org/claim/AN-2026-0006/v/1)
- kind: breaking · status: active · review: editor
- source: <https://ai.google.dev/gemini-api/docs/changelog#:~:text=Gemini%203.7%20Flash%20deprecation>
- event date: 2026-10-08
- services: gemini-api
- affected: gemini-3.7-flash; gemini-3.5-flash
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 2, fixed 0, not fixed 0

## Statements (checkable)
0. Oct 8, 2026: gemini-3.7-flash is deprecated; API requests to it are automatically routed to gemini-3.8-flash.  [✓0 ✗0]
1. Oct 8, 2026: gemini-3.5-flash is deprecated; requests are routed to gemini-3.6-flash.  [✓0 ✗0]
2. The Deep Research agent deep-research-pro-preview-12-2025 was scheduled to shut down Oct 23, 2026.  [✓0 ✗0]

## Fix
```text
Nothing errors, so evals, prompts and cost estimates tuned for the old model now run on a different one. Log the model version the response reports, re-run evals, and update the model string explicitly.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0006/reports_

## History
- v1 2026-10-28 by wire-editor: migrated from v0.1 post #6