23 September 2026

test-and-evaluate/strengthen-guardrails/handle-streaming-refusals 1 read ±changed +15−3 managed-agents/webhooks 1 read ±changed +2−2 managed-agents/migration 1 read ±changed +1−1 managed-agents/agent-setup 1 read ±changed +1−1 manage-claude/workload-identity-federation 1 read ±changed +1−1 manage-claude/spend-limits-api 1 read ±changed +1−1 build-with-claude/thinking-tool-workflows 1 read ±changed +31−0 build-with-claude/task-budgets 1 read ±changed +1−1 build-with-claude/streaming 1 read ±changed +2−2 build-with-claude/refusals-and-fallback 2 reads ±changed +5−5 build-with-claude/prompt-caching 2 reads ±changed +4−4 build-with-claude/mid-conversation-effort-example 1 read ±changed +8−8 agents-and-tools/tool-use/tool-runner 2 reads ±changed +55−43 about-claude/models/optimizing-for-cost-and-intelligence 1 read ±changed +115−113 release-notes/system-prompts/claude-opus-5-5 1 read +new page +186−0 release-notes/overview 1 read ±changed +4−6 models/sonnet-5/overview 1 read ±changed +10−9 models/sonnet-4-6/overview 1 read ±changed +10−9 models/sonnet-4-5/overview 1 read ±changed +10−9 models/overview 1 read ±changed +1−1 models/opus-5/whats-new-opus-5 1 read −removed +0−357 models/opus-5/overview 1 read ±changed +14−33 models/opus-5/migration-guide 1 read −removed +0−1378 models/opus-5-5/whats-new-opus-5-5 1 read +new page +175−0 models/opus-5-5/overview 1 read +new page +137−0 models/opus-5-5/migration-guide 1 read +new page +1799−0 models/opus-4-8/overview 1 read ±changed +11−10 models/opus-4-7/overview 1 read ±changed +11−10 models/opus-4-6/overview 1 read ±changed +13−12 models/opus-4-5/overview 1 read ±changed +13−12 models/mythos-5/overview 1 read ±changed +10−9 models/mythos-5-1/overview 1 read ±changed +10−9 models/haiku-4-5/overview 1 read ±changed +10−9 models/fable-5/overview 1 read ±changed +10−9 models/fable-5/migration-guide 1 read ±changed +1−1 models/fable-5-1/overview 1 read ±changed +10−9 models/fable-5-1/migration-guide 1 read ±changed +113−143 managed-agents/files 1 read ±changed +16−22 manage-claude/compliance-sessions 1 read ±changed +2−0 manage-claude/compliance-content-data 1 read ±changed +2−2 claude_api_primer 1 read ±changed +1−0 build-with-claude/working-with-messages 1 read ±changed +1−1 build-with-claude/thinking-steering-and-cost 1 read ±changed +15−15 build-with-claude/prompt-engineering/prompting-claude-opus-5-5 1 read +new page +165−0 build-with-claude/prompt-engineering/prompting-claude-opus-5 1 read ±changed +2−6 build-with-claude/prompt-engineering/prompting-claude-opus-4-8 1 read ±changed +2−2 build-with-claude/prompt-engineering/prompting-claude-fable-5-1 1 read ±changed +1−1 build-with-claude/prompt-engineering/claude-prompting-best-practices 1 read ±changed +2−2 build-with-claude/mid-conversation-system-messages 1 read ±changed +39−45 build-with-claude/handling-stop-reasons 1 read ±changed +33−2 build-with-claude/fast-mode 1 read ±changed +2−2 build-with-claude/extended-thinking 1 read ±changed +1−1 build-with-claude/context-editing 1 read ±changed +21−7 build-with-claude/compaction-threshold 1 read ±changed +15−7 build-with-claude/compaction-on-demand 1 read ±changed +19−23 build-with-claude/claude-on-vertex-ai 1 read ±changed +2−0 build-with-claude/claude-in-microsoft-foundry 1 read ±changed +16−14 build-with-claude/claude-in-amazon-bedrock 1 read ±changed +13−11 build-with-claude/batch-processing 1 read ±changed +4−0 api/models/retrieve 1 read ±changed +5−1 api/models/list 1 read ±changed +5−1 api/models 1 read ±changed +10−2 api/messages/create 1 read ±changed +10−2 api/messages/count_tokens 1 read ±changed +5−1 api/messages/batches/results 1 read ±changed +5−1 api/messages/batches/create 1 read ±changed +5−1 api/messages/batches 1 read ±changed +25−5 api/messages 1 read ±changed +46−10 api/compliance/activities/list 1 read ±changed +795−3 api/compliance/activities 1 read ±changed +7320−5760 api/compliance 1 read ±changed +795−3 api/completions/create 1 read ±changed +15−3 api/completions 1 read ±changed +20−4 api/claude-code/routines-fire 1 read ±changed +20−24 api/beta/vaults/update 1 read ±changed +5−1 api/beta/vaults/retrieve 1 read ±changed +5−1 api/beta/vaults/list 1 read ±changed +5−1 api/beta/vaults/delete 1 read ±changed +5−1 api/beta/vaults/credentials/update 1 read ±changed +5−1 api/beta/vaults/credentials/retrieve 1 read ±changed +5−1 api/beta/vaults/credentials/mcp_oauth_validate 1 read ±changed +5−1 api/beta/vaults/credentials/list 1 read ±changed +5−1 api/beta/vaults/credentials/delete 1 read ±changed +5−1 api/beta/vaults/credentials/create 1 read ±changed +5−1 api/beta/vaults/credentials/archive 1 read ±changed +5−1 api/beta/vaults/credentials 1 read ±changed +35−7 api/beta/vaults/create 1 read ±changed +5−1 api/beta/vaults/archive 1 read ±changed +5−1 api/beta/vaults 1 read ±changed +65−13 api/beta/user_profiles/update 1 read ±changed +5−1 api/beta/user_profiles/retrieve 1 read ±changed +5−1 api/beta/user_profiles/list 1 read ±changed +5−1 api/beta/user_profiles/create_enrollment_url 1 read ±changed +5−1 api/beta/user_profiles/create 1 read ±changed +5−1 api/beta/user_profiles 1 read ±changed +25−5 api/beta/tunnels/rotate_token 1 read ±changed +5−1 api/beta/tunnels/reveal_token 1 read ±changed +5−1 api/beta/tunnels/retrieve 1 read ±changed +5−1 api/beta/tunnels/list 1 read ±changed +5−1 api/beta/tunnels/create 1 read ±changed +5−1