{"rewrite":{"id":"r_37c390eb4f01487a8610f75c","clusterId":"c_142b2720e0c67a51cb9393f9","slug":"anthropic-releases-claude-haiku-5-5-with-reasoning-level-control","model":"deepseek-v4-1-flash","headline":"Anthropic Releases Claude Haiku 5.5 With Reasoning Level Control","summary":"Anthropic released Claude Haiku 5.5 on October 7, 2026, the Haiku tier's first update in a year. It scores higher than Claude Haiku 4.5 on benchmarks and surpasses GPT-6 Luna. Artificial Analysis measured its Intelligence Index v4.3.2 score at 43, up from 17 for Haiku 4.5. It is available on all plans, including free, and via API.","whyItMatters":"A cheap-tier model that beats a rival's scores and undercuts the previous Haiku's API prices reframes the low-cost tier as the place Anthropic now pitches as a companion to its larger models rather than a fallback.","webCardHtml":"\u003cp\u003eHaiku 5.5 is the first model in the Haiku series to support reasoning-level adjustment, which lets users trade cost for score.\u003c/p\u003e\u003cp\u003eOn OSWorld 2.1, which measures AI PC operation performance, Anthropic\u0026#39;s cost-per-task chart puts Haiku 5.5 above GPT-6 Luna in performance per cost. At the High reasoning setting it reaches a higher score at lower cost than Claude Sonnet 5.5 at Low.\u003c/p\u003e\u003cp\u003eAnthropic proposes running it alongside Claude Opus 5.5 or Claude Sonnet 5.5, and a demo shows the Opus plus Haiku combination processing faster and cheaper than Opus alone. Alongside the release, the cache read price for Claude Sonnet 5.5 was halved.\u003c/p\u003e","blueskyPost":"Claude Haiku 5.5 scores 43 on Intelligence Index v4.3.2, up from 17. That jump matters less than the price: Anthropic put its cheapest tier on every plan, free included.","twitterPost":"Claude Haiku 5.5 jumped from 17 to 43 on Intelligence Index v4.3.2 while sitting in the cheap tier. Anthropic priced this below the last Haiku.","threadsPost":"Claude Haiku 5.5 scores 43 on Intelligence Index v4.3.2 versus 17 for Claude Haiku 4.5, and it runs on every plan including free. Anthropic put the biggest gain of the year in the tier most users never pay for.","newsletterBlurb":"Anthropic released Claude Haiku 5.5 on October 7, the Haiku tier's first update in a year. It improves on Claude Haiku 4.5 across benchmarks, surpasses GPT-6 Luna, and is the first Haiku model with reasoning-level adjustment. Anthropic pitches it as a companion to Opus 5.5 or Sonnet 5.5, and the cache read price for Sonnet 5.5 was halved at the same time.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20261008-claude-haiku-5-5/\",\"title\":\"Claude Haiku 5.5 Released, Outperforms GPT-6 Luna and Costs 90% Less Than Previous Model\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4959,"outputTokens":696,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1791428840,"createdAt":"2026-10-08T03:02:54.000Z","publishedAt":"2026-10-08T03:06:11.000Z","updatedAt":"2026-10-08T03:06:11.000Z"},"cluster":{"id":"c_142b2720e0c67a51cb9393f9","canonicalTitle":"「Claude Haiku 5.5」が登場、GPT-6 Lunaより高性能で前モデルより9割引きの安価なモデル","representativeArticleId":"a_0e2d9418146aa4e53248b11c","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"Claude Haiku 5.5\",\"GPT-6 Luna\",\"Claude Haiku 4.5\"],\"studios\":[\"Anthropic\"],\"people\":[],\"type\":\"release\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-10-08T01:44:00.000Z","lastSeenAt":"2026-10-08T01:44:00.000Z","updatedAt":"2026-10-08T03:06:07.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20261008-claude-haiku-5-5/","title":"「Claude Haiku 5.5」が登場、GPT-6 Lunaより高性能で前モデルより9割引きの安価なモデル"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["Claude Haiku 5.5","GPT-6 Luna","Claude Haiku 4.5"],"studios":["Anthropic"],"people":[],"type":"release","domain":"other","is_roundup":false},"keyFacts":null}