Azure retires claude-sonnet-4-5 on Oct 19, 2026: what to know
- Date
- Oct 19, 2026
- Model
claude-sonnet-4-5- Named replacement
- None named
- Maker
- Anthropic
Price before and after
Not in the forecast. Price not modeled in v1.
Claude in Microsoft Foundry: version 1 is hosted on Anthropic infrastructure, version 2 is hosted on Azure. Azure prices are not modeled in v1; this row lists the retirement date only.
Source
“claude-sonnet-4-5 1 GA 2026-10-19 —”
https://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule · checked Sep 29, 2026
Methodology and limits
Prices are list prices in USD per 1M tokens from the provider's pricing page; dates and named replacements come from the provider's deprecation page, quoted above with the date we last checked. The replacement is the provider's named replacement, not our recommendation — quality and behavior can differ. Discounts, committed-use or enterprise agreements, batch and regional pricing, and Azure OpenAI and Amazon Bedrock prices are not included. Dates marked "at least through" or "not before" are shown but never applied.Full methodology →