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Anthropic launches Claude Haiku 5.5 with effort controls and lower costs

Anthropic has introduced Claude Haiku 5.5, pitching its cheapest and fastest small model yet with built-in effort controls and running costs around 75% lower than Haiku 4.5.

Infographic graphic announcing Anthropic's launch of Claude Haiku 5.5, highlighting input pricing at $0.10 per 1M tokens, output pricing at $0.50, and 75% cost reduction compared to Haiku 4.5.
Image: @AGTPinsights

Anthropic announced the release of Claude Haiku 5.5 on October 7, 2026, describing it as its fastest, cheapest, and most capable small model to date. Built as the successor to Haiku 4.5, the model is targeted at high-volume, cost-sensitive workloads such as document summaries, classification, and live customer support. The launch represents Anthropic's third Claude 5.5 model in a month, arriving 15 days after the release of Opus 5.5.[1][6][9][11][13][14][15]

The company reduced average running costs by about 75% compared to Haiku 4.5. For requests up to 100,000 tokens, Haiku 5.5 is priced at $0.10 per million input tokens and $0.50 per million output tokens, according to The New Stack. Prompts exceeding 100,000 tokens cost $0.50 per million input tokens and $2.50 per million output tokens, down from $1 and $5 on Haiku 4.5. In the same announcement, Anthropic cut Sonnet 5.5 cache read prices in half and rolled out API credits for Max and Team users.[5][7][8][9][10][14]

Anthropic is also positioning Haiku 5.5 for agentic tasks, making it the first Haiku model equipped with effort controls. The model scored 72.4% on the OSWorld benchmark, up from 15.7% achieved by Haiku 4.5, and Anthropic claims it tops OpenAI's GPT-6 Luna on several benchmark tests. The release comes as the AI company prepares for an anticipated November initial public offering at a valuation near $2 trillion.[2][3][4][12][13][16][17]

Key facts

  • Anthropic announced Claude Haiku 5.5 on October 7, 2026, calling it its cheapest, fastest, and most capable small model yet.
  • Claude Haiku 5.5 is the first Haiku model with effort controls and is pitched for agentic work as well as high-volume tasks like summaries, classification, and live support.
  • The model's average running costs are approximately 75% lower than those of Haiku 4.5.
  • Anthropic priced Haiku 5.5 at $0.10 per million input tokens and $0.50 per million output tokens for requests up to 100K tokens, and $0.50 input and $2.50 output for requests above 100K tokens.
  • Claude Haiku 5.5 achieved a 72.4% score on the OSWorld benchmark compared to 15.7% for Haiku 4.5, and Anthropic claims it beats OpenAI's GPT-6 Luna on several tests.
  • Alongside the release, Anthropic halved Sonnet 5.5 cache read prices and introduced API credits for Max and Team users.
  • The release came 15 days after Opus 5.5 launched and ahead of a reported November IPO targeting a valuation near $2 trillion.

Sources · 14 sources

  1. DE

    Decrypt@DecryptMediaPost on X ·

    Anthropic Launches Haiku 5.5: Its Cheapest and Fastest Claude Model Yet https://t.co/2iyFGsLLST

    Open source
  2. CO

    CoinGape@CoinGapeMediaPost on X ·

    🔥⚡ JUST IN: Anthropic launches Claude Haiku 5.5, its fastest model yet, delivering 72.4% on OSWorld, up from just 15.7% with Haiku 4.5, while costing roughly 75% less to run. https://t.co/qOUGlHGQ1C

    Open source
  3. TN

    The New Stack@thenewstackPost on X ·

    Haiku 5.5 adds effort controls and posts big gains on computer-use and command-line benchmarks as Anthropic pitches its smallest model for agentic work. https://t.co/JbK9At5yvQ

    Open source
  4. TA

    Techstrong.ai@TechstrongaiPost on X ·

    Anthropic launched Claude Haiku 5.5, cutting AI inference costs by an average of 75% for high-volume enterprise tasks as the company reportedly prepares for an IPO. Read more: https://t.co/UdWL9qGWgq #Anthropic #ClaudeAI #EnterpriseAI #AIModels #GenerativeAI

    Open source
  5. SI

    SiliconANGLE@SiliconANGLEPost on X ·

    Anthropic releases Claude Haiku 5.5 small model and halves Sonnet 5.5 cache read prices https://t.co/yrnYq9TaOK

    Open source
  6. DE

    DecryptArticle ·

    Anthropic Launches Haiku 5.5: Its Cheapest and Fastest Claude Model Yet Claude Haiku 5.5 costs about 75% less to run than its predecessor and targets high-volume jobs like summaries and live customer support. It arrives 15 days after Opus 5.5.

    Open source
  7. TE

    Techmeme@TechmemePost on X ·

    Anthropic prices Haiku 5.5 at $0.10/1M input and $0.50/1M output tokens for requests up to 100K tokens, and $0.50 and $2.50 above, vs. $1 and $5 for Haiku 4.5 (@fredericl / The New Stack) (Visit Techmeme dot com for the link and full context!)

    Open source
  8. CB

    Crypto BriefingArticle ·

    Anthropic launches Claude Haiku 5.5 with 75% lower average costs Anthropic launched Claude Haiku 5.5 with 75% lower average costs, cut Sonnet cache pricing and announced API credits for Max and Team users. The post Anthropic launches Claude Haiku 5.5 with 75% lower average costs appeared first on Crypto Briefing .

    Open source
  9. AG

    AGTP@AGTPinsightsPost on X ·

    BREAKING: Anthropic launches Claude Haiku 5.5, its third Claude 5.5 model in a month. It costs 75% less than Haiku 4.5, at $0.10 per million input tokens and $0.50 https://t.co/jvanxGaEBS

    Open source
  10. CB

    Crypto Briefing@Crypto_BriefingPost on X ·

    🤖 NEW: Anthropic launches Claude Haiku 5.5, its fastest and most capable small model yet, targeting high volume workloads at roughly 75% lower average cost than Haiku 4.5. https://t.co/HYxB4nOmN4

    Open source
  11. NE

    NeowinFeed@NeowinFeedPost on X ·

    Anthropic has launched Claude Haiku 5.5, the successor to Haiku 4.5, designed for high-volume, cost-effective enterprise AI workloads. #Anthropic #Claude #Haiku5.5 https://t.co/27MvqhfO7N

    Open source
  12. CO

    CoinGape@CoinGapeMediaPost on X ·

    🚨 @AnthropicAI Launches Claude Haiku 5.5 Anthropic launched #Claude Haiku 5.5, targeting high-volume #AI workloads at 75% lower cost than Haiku 4.5, ahead of its expected November #IPO at a valuation near $2T. 🔗 Know more in comments

    Open source
  13. TE

    Techmeme@TechmemePost on X ·

    Anthropic launches Claude Haiku 5.5, the first Haiku model with effort controls, for high-volume, cost-sensitive tasks like summaries and classification (Anthropic) (Visit Techmeme dot com for the link and full context!)

    Open source
  14. CO

    Cointelegraph@CointelegraphPost on X ·

    ⚡️ NEW: Anthropic introduces Claude Haiku 5.5, calling it its fastest and most capable small model, with average running costs around 75% lower than Haiku 4.5. https://t.co/OL2n5wsvPW

    Open source
  15. TH

    The Hindu@the_hinduPost on X ·

    Anthropic on Wednesday (October 7, 2026) announced the Claude Haiku 5.5 model, describing it as its “cheapest, fastest, and most capable small model” yet. https://t.co/vyyZ4EKvbf

    Open source
  16. CO

    Cointelegraph@CointelegraphPost on X ·

    🔥⚡ JUST IN: Anthropic drops Claude Haiku 5.5, its fastest model yet, costing around 75% less to run than Haiku 4.5 while scoring 72.4% on OSWorld vs 15.7% for the old version. https://t.co/u41VV2jOHa

    Open source
  17. DI

    Digit@digitindiaPost on X ·

    Claude Haiku 5.5 is here! Anthropic claims its new AI model beats OpenAI's GPT-6 Luna on several benchmarks. https://t.co/YJKFJLkpOJ

    Open source