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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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50 pages for -n.

Titles and paths first, then pages whose text carries it. Each row opens that page as this site last read it. Cut at 50, so a narrower query shows the rest.

whats-new-opus-5 Claude Developer Platform · title models/opus-5/whats-new-opus-5 whats-new-sonnet-5 Claude Developer Platform · title models/sonnet-5/whats-new-sonnet-5 overview Claude Developer Platform · path release-notes/overview claude-fable-5 Claude Developer Platform · path release-notes/system-prompts/claude-fable-5 claude-haiku-3 Claude Developer Platform · path release-notes/system-prompts/claude-haiku-3 claude-haiku-3-5 Claude Developer Platform · path release-notes/system-prompts/claude-haiku-3-5 claude-haiku-4-5 Claude Developer Platform · path release-notes/system-prompts/claude-haiku-4-5 claude-opus-3 Claude Developer Platform · path release-notes/system-prompts/claude-opus-3 claude-opus-4 Claude Developer Platform · path release-notes/system-prompts/claude-opus-4 claude-opus-4-1 Claude Developer Platform · path release-notes/system-prompts/claude-opus-4-1 claude-opus-4-5 Claude Developer Platform · path release-notes/system-prompts/claude-opus-4-5 claude-opus-4-6 Claude Developer Platform · path release-notes/system-prompts/claude-opus-4-6 claude-opus-4-7 Claude Developer Platform · path release-notes/system-prompts/claude-opus-4-7 claude-opus-4-8 Claude Developer Platform · path release-notes/system-prompts/claude-opus-4-8 claude-opus-5 Claude Developer Platform · path release-notes/system-prompts/claude-opus-5 claude-sonnet-3-5 Claude Developer Platform · path release-notes/system-prompts/claude-sonnet-3-5 claude-sonnet-3-7 Claude Developer Platform · path release-notes/system-prompts/claude-sonnet-3-7 claude-sonnet-4 Claude Developer Platform · path release-notes/system-prompts/claude-sonnet-4 claude-sonnet-4-5 Claude Developer Platform · path release-notes/system-prompts/claude-sonnet-4-5 claude-sonnet-4-6 Claude Developer Platform · path release-notes/system-prompts/claude-sonnet-4-6 overview Claude Developer Platform · path release-notes/system-prompts/overview Week 13 · March 23–27, 2026 Claude Code CLI · path whats-new/2026-w13 Week 14 · March 30 – April 3, 2026 Claude Code CLI · path whats-new/2026-w14 Week 15 · April 6–10, 2026 Claude Code CLI · path whats-new/2026-w15 Week 16 · April 13–17, 2026 Claude Code CLI · path whats-new/2026-w16 Week 17 · April 20–24, 2026 Claude Code CLI · path whats-new/2026-w17 Week 18 · April 27 – May 1, 2026 Claude Code CLI · path whats-new/2026-w18 Week 19 · May 4–8, 2026 Claude Code CLI · path whats-new/2026-w19 Week 20 · May 11–15, 2026 Claude Code CLI · path whats-new/2026-w20 Week 21 · May 18–22, 2026 Claude Code CLI · path whats-new/2026-w21 Week 22 · May 25–29, 2026 Claude Code CLI · path whats-new/2026-w22 Week 23 · June 1–5, 2026 Claude Code CLI · path whats-new/2026-w23 Week 24 · June 8–12, 2026 Claude Code CLI · path whats-new/2026-w24 Week 25 · June 15–19, 2026 Claude Code CLI · path whats-new/2026-w25 Week 26 · June 22–26, 2026 Claude Code CLI · path whats-new/2026-w26 Week 27 · June 29 – July 3, 2026 Claude Code CLI · path whats-new/2026-w27 Week 28 · July 6–10, 2026 Claude Code CLI · path whats-new/2026-w28 Week 29 · July 13–17, 2026 Claude Code CLI · path whats-new/2026-w29 Week 30 · July 20–24, 2026 Claude Code CLI · path whats-new/2026-w30 Week 32 · August 3–7, 2026 Claude Code CLI · path whats-new/2026-w32 Week 33 · August 10–14, 2026 Claude Code CLI · path whats-new/2026-w33 Week 34 · August 17–21, 2026 Claude Code CLI · path whats-new/2026-w34 What's new Claude Code CLI · path whats-new/index Use Claude Science on a corporate network Claude Documentation · path claude-science/corporate-networks What's not available yet Claude Documentation · path claude-science/whats-not-available-yet SEP-2164: Standardize Resource Not Found Error Code Model Context Protocol · path seps/2164-resource-not-found-error SEP-986: Specify Format for Tool Names Model Context Protocol · path seps/986-specify-format-for-tool-names choosing-a-model Claude Developer Platform · in the page about-claude/models/choosing-a-model …sparkle" href="https://platform.claude.com/docs/en/models/opus-5/whats-new-opus-5"> Explore the latest improvements in Claude Opus 5 </Card> <Card title="What's new in Claude Sonnet 5" icon="… Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …/docs/en/agents-and-tools/agent-skills/claude-api-skill#migrating-to-a-newer-claude-model). It works for any target model on this page: ```text wrap /claude-api migrate this project to claude-opu… optimizing-for-cost-and-intelligence Claude Developer Platform · in the page about-claude/models/optimizing-for-cost-and-intelligence …this form: DECISION | LABEL | REASON where DECISION is one of: triage-now, needs-info, close-duplicate; LABEL is one of: bug-confirmed, needs-more-info, duplicate-candidate, feature-request, upstream…