◉CLAUDE LABJP
●2.1.310 — Monitor tool now works on Bedrock, Vertex and Foundry, and gateway failures are fixed (10/23)●2.1.307 — Fixes MCP failing to reconnect after sleep or a keychain lock (10/21). 2.1.306 also fixed the false claude -p login message●SONNET 4.5 — Retires on the Claude API on 11/30, 36 days left. Migrate to Sonnet 5.5●WINDOWS — Reports say hooks break silently only on Japanese-locale Windows; check the character encoding first●API — In API version 2026-10-21, passing temperature, top_p or top_k returns a 400 error●NEW — I Put a Ten-Line Promise File at the To…●2.1.310 — Monitor tool now works on Bedrock, Vertex and Foundry, and gateway failures are fixed (10/23)●2.1.307 — Fixes MCP failing to reconnect after sleep or a keychain lock (10/21). 2.1.306 also fixed the false claude -p login message●SONNET 4.5 — Retires on the Claude API on 11/30, 36 days left. Migrate to Sonnet 5.5●WINDOWS — Reports say hooks break silently only on Japanese-locale Windows; check the character encoding first●API — In API version 2026-10-21, passing temperature, top_p or top_k returns a 400 error●NEW — I Put a Ten-Line Promise File at the To…
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◉ Claude AI/2026-04-03Intermediate

Migrating from the Claude 1M Context Window Beta: Everything You Need to Do Before April 30, 2026

Anthropic is retiring the 1M token context window beta for Claude Sonnet 4.5 and Sonnet 4 on April 30, 2026. Learn how to migrate to Claude Sonnet 4.6 before the context-1m-2025-08-07 header stops working.