{"type":"post","id":"anthropic-released-api-version-2026-10-21-its-c6768c","slug":"anthropic-released-api-version-2026-10-21-its-c6768c","title":"Anthropic released API version 2026-10-21 , its first versioned release since 2023-06-01.","description":"Anthropic has published API version 2026-10-21, with a migration guide from the previous 2023-06-01 version.","retrieval_nugget":"Anthropic has published API version 2026-10-21, with a migration guide from the previous 2023-06-01 version.","published_at":"2026-10-22","updated_at":"2026-10-22","record_date":"2026-10-22","date_kind":"published_at","topics":["anthropic"],"entities":["Anthropic","Claude API","Claude Enterprise Analytics API","Admin API","Python SDK"],"related_patterns":["harness-architecture-outlives-model-choice"],"novelty_label":"new_fact","what_changed":"Anthropic released API version 2026-10-21, its first versioned release since 2023-06-01, with breaking changes requiring developers to update integrations.","prior_refs":[],"source_url":"https://platform.claude.com/docs/en/api/migration-2026-10-21","source_urls":["https://platform.claude.com/docs/en/api/migration-2026-10-21"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:anthropic-released-api-version-2026-10-21-its-c6768c","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/anthropic-released-api-version-2026-10-21-its-c6768c/","markdown":"https://newruntime.com/posts/anthropic-released-api-version-2026-10-21-its-c6768c.md","json":"https://newruntime.com/posts/anthropic-released-api-version-2026-10-21-its-c6768c.json"},"next_reads":[{"type":"topic","path":"/topics/anthropic/","url":"https://newruntime.com/topics/anthropic/","title":"Anthropic","reason":"Explore the anthropic topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/anthropic.md","json_url":"https://newruntime.com/topics/anthropic.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}