Anthropic News | claude-opus-4-1 Deprecation and SDK Updates
For those wondering "Does Anthropic's model deprecation or SDK update affect my environment?", the Clauder Navi editorial team brings you the official Anthropic information from June 8, 2026 in a news-style format. Today we cover four headline changes: the deprecation of claude-opus-4-1-20250805 (scheduled for removal on 2026-08-05), and updates to the Python, TypeScript, and Bedrock SDKs.
The most urgent action item is the deprecation announcement for claude-opus-4-1-20250805. Following Anthropic's 60-day advance notice policy, 2026-08-05 has been officially confirmed as the deprecation date. In addition to migrating to the recommended claude-opus-4-8, another critical point not to overlook: for claude-opus-4-7 and later models, specifying non-default values for temperature, top_p, or top_k will result in a 400 error (no impact if you leave them at their default values).
For the Python SDK, a bug where the x-api-key header required for authentication was not being sent when using Anthropic models via Microsoft Azure AI Foundry was fixed in v0.107.1. Projects with Foundry integration are advised to update promptly. There is no impact for environments using the Anthropic API directly.
For the TypeScript SDK and Bedrock SDK, the execution order was corrected so that middleware runs before request signing. The type definitions for Managed Agents were also updated in a minor release, and TypeScript projects are advised to verify type compatibility.
目次 (6)
[1] claude-opus-4-1-20250805 Deprecated — Retiring August 5
Anthropic officially announced on 2026-06-05 that claude-opus-4-1-20250805 is scheduled for deprecation. The retirement date is 2026-08-05, and claude-opus-4-8 is recommended as the migration target. ( https://platform.claude.com/docs/en/about-claude/model-deprecations )
Impact level: ★★★. Developers using claude-opus-4-1 in production need to complete the migration within two months. Additionally, for claude-opus-4-7 and later models, specifying non-default values for temperature, top_p, or top_k will return a 400 error. Any existing code that hardcodes these parameters will require additional fixes. This is a notification through Anthropic's standard deprecation process, and we recommend verifying production environments at the earliest opportunity.
[2] anthropic-sdk-python v0.107.1 Released — Foundry Authentication Bug Fix
anthropic-sdk-python v0.107.1 was released on 2026-06-07 at 17:18 UTC. A bug where the x-api-key header required for authentication was not being sent when using Anthropic models via Microsoft Foundry has been fixed. ( https://github.com/anthropics/anthropic-sdk-python/releases/tag/v0.107.1 )
Impact level: ★★. If you have been experiencing authentication errors when using Claude via Azure AI Foundry or similar, this bug is likely the cause. Environments using the Anthropic API directly are not affected. v0.107.0 (released 2026-06-06) also included type updates for Managed Agents, making this a series of consecutive updates. Projects with Foundry integration should consider updating to v0.107.1 promptly.
[3] anthropic-sdk-typescript v0.102.0 — Managed Agents Type Update
anthropic-sdk-typescript v0.102.0 was released on 2026-06-06 at 17:13 UTC. The type definitions for Managed Agents (Anthropic's feature for managing and coordinating multiple AI agents) received a minor update, and internal behavior was corrected so that middleware runs before request signing. ( https://github.com/anthropics/anthropic-sdk-typescript/releases )
Impact level: ★★. Projects implementing Managed Agents in TypeScript are advised to verify type compatibility. Additionally, custom implementations that perform pre-signing processing in middleware should be tested for correct behavior. bedrock-sdk v0.30.1 and aws-sdk v0.4.1 received the same middleware fix at the same time, so projects using Amazon Bedrock should also consider updating the Bedrock SDK.
[4] bedrock-sdk v0.30.1 / aws-sdk v0.4.1 — Middleware Fix
Released on the same date and time as anthropic-sdk-typescript: 2026-06-06 at 17:13 UTC. This is an internal behavior fix only — middleware now runs before request signing — with no functional changes. ( https://github.com/anthropics/anthropic-sdk-typescript/releases — see the release list in the same repository for the tags bedrock-sdk-v0.30.1 / aws-sdk-v0.4.1 )
Impact level: ★. Standard environments that do not use custom middleware are not affected. If you are using Claude via AWS/Bedrock and have implemented custom middleware, verify behavior and consider updating.
What to Watch Next
The highest priority action right now is migrating away from claude-opus-4-1. The deprecation date is 2026-08-05, which is already less than 60 days away. We recommend starting soon on identifying all production usage and testing the switch to claude-opus-4-8. For the SDKs, both Python and TypeScript are seeing active updates; keeping up with the latest versions will contribute to stable operations for projects with Foundry integration or Bedrock-based implementations. There are currently no new posts on the Anthropic News or Engineering Blog (the latest entries are dated 6/3 and 4/23 respectively), but we will continue to monitor developments.
