haiku

Introducing Claude Haiku 5.5: the cheapest, fastest, and most capable small model we’ve ever released. On average, it costs around 75% less to run than Claude Haiku 4.5.

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A Claude Code mod for non-native English writers and dictation users: optional auto-fix on send (LanguageTool rules or a light Haiku fix), Haiku drafts at three levels that use project terms, and word tools (native language to English, synonyms).

A Claude Code plugin that suggests three next tasks after longer turns, with clickable one-click actions.

Brings back /buddy: the small creature that watched you code, above the prompt again. Restores the companion in ~/.claude.json exactly (same species, rarity, hat and stats), hatches an egg for new accounts, levels up from commits and passing tests, unlocks a 49-buddy roster as you ship, reacts to Claude's work for free, answers in a Haiku-written line when you say its name, and shows in a pane on desktop and mobile. Needs CLAUDE_CODE_ENABLE_FUNCTION_HOOKS=1.

A Claude Code plugin that shows a live checklist above the prompt of conversation loose ends: unanswered questions, points made in passing, caveats and deferred work, updated after each turn by a small model.

A Claude Code mod that translates the final conversation output into a chosen language and displays it in a side panel, defaulting to Haiku on low effort.

A fast second opinion on every edit Claude makes.

After each response, Haiku proposes three next requests in buttons above the box (keys 1-3). /custos shows the measured tokens.

optimAIzr 0.8.0 is an open-source mod that can switch simple work to Haiku mid-session and display the cost savings.

A Claude Code plugin that fixes spelling mistakes and typos in your prompt before the model reads it.

A Claude Code mod that, while Claude is thinking, shows a small card above your input box, picking a concept each day from Hacker News and trending GitHub repositories to ask you about.

A tiny pixel theater above your Claude Code prompt: little orange Claude acts out each tool call at a desk while a monitor shows the real command and Haiku narrates it in your request's language.