Documentation Index
Fetch the complete documentation index at: https://docs.ai-stats.phaseo.app/llms.txt
Use this file to discover all available pages before exploring further.
Model Migrations
Use these guides when you are staying on the same platform but upgrading the model itself. These pages focus on the changes that usually break real integrations first:- request parameter changes
- prompt and reasoning behavior shifts
- structured output and tool-calling regressions
- rollout, fallback, and rollback strategy
Available guides
- Anthropic: Claude Opus 4.6 to 4.7
- Anthropic: Claude Opus 4.5 to 4.6
- Anthropic: Claude Sonnet 4.5 to 4.6
- OpenAI: Migrating to GPT-5.4
- Google: Migrating to Gemini 3 and 3.1
- Google: Nano Banana 1 to Nano Banana 2
- Mistral: Mistral Small 3.2 to Mistral Small 4
- xAI: Grok 4.20
Release timeline
| Guide | Model release date |
|---|---|
| Anthropic: Claude Opus 4.6 to 4.7 | April 16, 2026 |
| Anthropic: Claude Opus 4.5 to 4.6 | February 5, 2026 |
| Anthropic: Claude Sonnet 4.5 to 4.6 | February 17, 2026 |
| OpenAI: Migrating to GPT-5.4 | March 5, 2026 |
| Google: Migrating to Gemini 3 and 3.1 | Gemini 3: November 25, 2025; Gemini 3.1 Pro: February 19, 2026 |
| Google: Nano Banana 1 to Nano Banana 2 | February 26, 2026 |
| Mistral: Mistral Small 3.2 to Mistral Small 4 | March 16, 2026 |
| xAI: Grok 4.20 | February 17, 2026 |
How to use this section
- Start with the guide for the exact model family you are upgrading.
- Update the request shape before testing output quality.
- Re-run prompt and schema evaluations on production-like prompts.
- Shift traffic gradually with explicit fallback and rollback rules.