25 August 2026

release-notes/overview 1 read ±changed +2−2 models/sonnet-5/whats-new-sonnet-5 1 read ±changed +1−1 models/sonnet-5/overview 1 read ±changed +1−1 models/sonnet-5/migration-guide 1 read +new page +662−0 models/sonnet-4-6/overview 1 read ±changed +2−2 models/sonnet-4-5/overview 1 read ±changed +2−2 models/overview 1 read ±changed +1−1 models/opus-5/whats-new-opus-5 1 read ±changed +1−1 models/opus-5/overview 1 read ±changed +1−1 models/opus-5/migration-guide 1 read +new page +1358−0 models/opus-4-8/overview 1 read ±changed +2−2 models/opus-4-7/overview 1 read ±changed +2−2 models/opus-4-6/overview 1 read ±changed +2−2 models/opus-4-5/overview 1 read ±changed +2−2 models/mythos-5/overview 1 read ±changed +1−1 models/haiku-4-5/overview 1 read ±changed +1−1 models/haiku-4-5/migration-guide 1 read +new page +91−0 models/fable-5/overview 1 read ±changed +1−1 models/fable-5/migration-guide 1 read +new page +696−0 models/fable-5/introducing-claude-fable-5-and-claude-mythos-5 1 read ±changed +3−3 build-with-claude/working-with-messages 1 read ±changed +1−1 build-with-claude/refusals-and-fallback 1 read ±changed +1−1 build-with-claude/prompt-engineering/prompting-claude-sonnet-5 1 read ±changed +1−1 build-with-claude/prompt-engineering/prompting-claude-opus-5 1 read ±changed +2−2 build-with-claude/prompt-engineering/prompting-claude-opus-4-8 1 read ±changed +2−2 build-with-claude/prompt-engineering/claude-prompting-best-practices 1 read ±changed +1−1 build-with-claude/fast-mode 1 read ±changed +2−2 agents-and-tools/agent-skills/claude-api-skill 1 read ±changed +2−2 about-claude/model-deprecations 1 read ±changed +1−1 managed-agents/environments 1 read ±changed +2−2 build-with-claude/claude-platform-on-aws 1 read ±changed +22−22 api/skills/versions/retrieve 1 read ±changed +11−14 api/skills/versions/list 1 read ±changed +13−14 api/skills/versions/delete 1 read ±changed +9−14 api/skills/versions/create 1 read ±changed +19−14 api/skills/versions 1 read ±changed +47−34 api/skills/retrieve 1 read ±changed +13−14 api/skills/list 1 read ±changed +14−13 api/skills/delete 1 read ±changed +9−14 api/skills/create 1 read ±changed +26−13 api/skills 1 read ±changed +128−144 api/models/retrieve 1 read ±changed +16−19 api/models/list 1 read ±changed +15−16 api/models 1 read ±changed +30−27 api/messages/create 1 read ±changed +716−508 api/messages/count_tokens 1 read ±changed +303−380 api/messages/batches/retrieve 1 read ±changed +29−14 api/messages/batches/results 1 read ±changed +256−173 api/messages/batches/list 1 read ±changed +30−13 api/messages/batches/delete 1 read ±changed +9−14 api/messages/batches/create 1 read ±changed +363−394 api/messages/batches/cancel 1 read ±changed +29−14 api/messages/batches 1 read ±changed +1459−1046 api/messages 1 read ±changed +4670−7513 api/files/upload 1 read ±changed +33−14 api/files/retrieve_metadata 1 read ±changed +20−15 api/files/list 1 read ±changed +21−14 api/files/download 1 read ±changed +5−10 api/files/delete 1 read ±changed +9−14 api/files 1 read ±changed +90−39 api/compliance/organizations/users/list 1 read ±changed +14−15 api/compliance/organizations/users 1 read ±changed +15−14 api/compliance/organizations/settings/retrieve 1 read ±changed +47−50 api/compliance/organizations/settings 1 read ±changed +77−78 api/compliance/organizations/roles/retrieve 1 read ±changed +8−13 api/compliance/organizations/roles/permissions/list 1 read ±changed +12−15 api/compliance/organizations/roles/permissions 1 read ±changed +11−14 api/compliance/organizations/roles/list 1 read ±changed +12−15 api/compliance/organizations/roles 1 read ±changed +34−55 api/compliance/organizations/list 1 read ±changed +11−14 api/compliance/organizations 1 read ±changed +144−545 api/compliance/groups/retrieve 1 read ±changed +8−13 api/compliance/groups/members/list 1 read ±changed +12−15 api/compliance/groups/members 1 read ±changed +11−14 api/compliance/groups/list 1 read ±changed +13−14 api/compliance/groups 1 read ±changed +35−58 api/compliance/code/artifacts/retrieve_version 1 read ±changed +6−11 api/compliance/code/artifacts/list 1 read ±changed +30−17 api/compliance/code/artifacts/delete 1 read ±changed +9−14 api/compliance/code/artifacts 1 read ±changed +47−30 api/compliance/code 1 read ±changed +55−131 api/compliance/apps/sessions/remote/messages/list 1 read ±changed +49−32 api/compliance/apps/sessions/remote/messages 1 read ±changed +66−39 api/compliance/apps/sessions/remote/list 1 read ±changed +30−17 api/compliance/apps/sessions/remote 1 read ±changed +87−163 api/compliance/apps/sessions/local/retrieve 1 read ±changed +14−15 api/compliance/apps/sessions/local/messages/list 1 read ±changed +57−42 api/compliance/apps/sessions/local/messages 1 read ±changed +82−59 api/compliance/apps/sessions/local/list 1 read ±changed +25−18 api/compliance/apps/sessions/local 1 read ±changed +108−225 api/compliance/apps/sessions 1 read ±changed +193−557 api/compliance/apps/projects/retrieve 1 read ±changed +21−18 api/compliance/apps/projects/list 1 read ±changed +42−21 api/compliance/apps/projects/documents/retrieve 1 read ±changed +11−14 api/compliance/apps/projects/documents/metadata 1 read ±changed +12−15 api/compliance/apps/projects/documents/delete 1 read ±changed +9−14 api/compliance/apps/projects/documents 1 read ±changed +35−32 api/compliance/apps/projects/delete 1 read ±changed +9−14 api/compliance/apps/projects/collaborators/list 1 read ±changed +28−23 api/compliance/apps/projects/collaborators 1 read ±changed +47−34