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    Announcement

    Anthropic launches Claude Haiku 5.5, its newest small model

    Anthropic says its newest small model costs about 75% less to run than Haiku 4.5 on average.

    AnthropicAN
    Christian SzegedyCS
    Boris ChernyBC
    32 Sources, ,

    TLDR

    Anthropic has released Claude Haiku 5.5, describing it as its fastest and most capable small model yet. The company says it costs about 75% less to run than Haiku 4.5 on average and improves coding, computer use and knowledge work. Cursor and Arena.ai have already added access to the model.

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    Anthropic introduced Claude Haiku 5.5, describing it as its cheapest, fastest and most capable small model to date. The company says average running costs are about 75% lower than Claude Haiku 4.5.

    Featured Source

    A second official post describes Haiku 5.5 as a significant improvement across coding, computer use and knowledge work.

    Claude Haiku 5.5 is already available in Cursor and Arena.ai. Arena said evaluation scores are still forthcoming.

    Sentiment

    Positive——Negative

    Summary

    Not enough discussion yet.

    No sentiment analysis available yet.

    Anthropic
    Today's Rank

    #2

    Today's Rank

    #2

    Sentiment

    Positive——Negative

    Summary

    Not enough discussion yet.

    No sentiment analysis available yet.

    32 Sources

    Chubby♨️@kimmonismusClaude Haiku 5.5 is probably being released today. Already fund in the latest Claude Code update. Super curious how good it is. I expect it close-ish to Sonnet but far cheaper, probably Luna-pricing.1h
    Andrew Curran@AndrewCurran_Haiku 5.5 is live for me right now.1h
    Lisan al Gaib@scaling01it's cheap af1h
    Claude@claudeaiIntroducing 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 4.5.1h
    Anthropic@AnthropicAIClaude Haiku 5.5, our latest model:1h
    Mike Krieger@mikeykAnother model joins the 5.5 family with the small but mighty Haiku 5.5! It’s built for speed and efficiency, and costs 75% less than Haiku 4.5. Opus does the heavy thinking, Haiku does the high-volume work, and together you get more done for less. Happy shipping!1h
    🚨 AI News | TestingCatalog@testingcatalogBREAKING 🔥: Anthropic released Claude Haiku 5.5, its fastest and cheapest model to date. > Haiku 5.5 costs 75% less to run than Haiku 4.5! > It is the first Haiku model to have an adjustable effort setting. > On benchmarks, it is a big leap in performance at Computer Use and Agentic Coding across the group.1h
    Cursor@cursor_aiClaude Haiku 5.5 is now available in Cursor! On shorter requests, it costs 10x less than Claude Haiku 4.5. Turn it on in Cursor Settings > Models.1h
    Bindu Reddy@bindureddyHearing rumors that Haiku 5.5 may slash prices by almost 10x Yes, 10x!! Will compete with DeepSeek and Luna Common man's intelligence has officially become too cheap to meter1h
    edwin@edwinarbusHaiku took its time, four point five to five point five. Worth the wait, we hope.1h

    Related

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    Verified professionals can access Mythos 5.1, Opus 5.5 and Sonnet 5.5 with defensive safeguards, Anthropic says.

    Inside the claim that Anthropic subscriptions offer five times OpenAI’s value

    SemiAnalysis measured usage meters and priced token allowances at API rates for an agentic workload.

    Meta and Microsoft reportedly scale back employee Claude use

    The Information says Microsoft cut projected Claude spending while Meta’s Claude Code users reportedly halved.

    32 Sources

    Chubby♨️@kimmonismusClaude Haiku 5.5 is probably being released today. Already fund in the latest Claude Code update. Super curious how good it is. I expect it close-ish to Sonnet but far cheaper, probably Luna-pricing.1h
    Andrew Curran@AndrewCurran_Haiku 5.5 is live for me right now.1h
    Lisan al Gaib@scaling01it's cheap af1h
    Claude@claudeaiIntroducing 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 4.5.1h
    Anthropic@AnthropicAIClaude Haiku 5.5, our latest model:1h
    Mike Krieger@mikeykAnother model joins the 5.5 family with the small but mighty Haiku 5.5! It’s built for speed and efficiency, and costs 75% less than Haiku 4.5. Opus does the heavy thinking, Haiku does the high-volume work, and together you get more done for less. Happy shipping!1h
    🚨 AI News | TestingCatalog@testingcatalogBREAKING 🔥: Anthropic released Claude Haiku 5.5, its fastest and cheapest model to date. > Haiku 5.5 costs 75% less to run than Haiku 4.5! > It is the first Haiku model to have an adjustable effort setting. > On benchmarks, it is a big leap in performance at Computer Use and Agentic Coding across the group.1h
    Cursor@cursor_aiClaude Haiku 5.5 is now available in Cursor! On shorter requests, it costs 10x less than Claude Haiku 4.5. Turn it on in Cursor Settings > Models.1h
    Bindu Reddy@bindureddyHearing rumors that Haiku 5.5 may slash prices by almost 10x Yes, 10x!! Will compete with DeepSeek and Luna Common man's intelligence has officially become too cheap to meter1h
    edwin@edwinarbusHaiku took its time, four point five to five point five. Worth the wait, we hope.1h