Claude Haiku 5.5 is Anthropic’s smallest and fastest current model, released on 7 October 2026 as the third model of the Claude 5.5 family, after Opus 5.5 and Sonnet 5.5. Seg\u00fan Anthropic<\/a>, it is built for high-volume, cost-sensitive work such as classification, extraction, summaries, quick lookups, live customer support and sub-agent tasks next to Opus 5.5 or Sonnet 5.5. It is the first Haiku model with an adjustable effort setting.<\/p>\n Pricing depends on prompt length. For prompts up to 100,000 tokens it costs $0.10 per million input tokens and $0.50 per million output tokens; above 100,000 tokens it costs $0.50 and $2.50. Cache reads are $0.01 per million (up to 100K). That is far below Claude Haiku 4.5 ($1 \/ $5): Anthropic says Haiku 5.5 costs around 75% less on average, even though its newer tokenizer counts about 30% more tokens for the same text. Full rates are on La p\u00e1gina de precios de Anthropic<\/a>.<\/p>\n It has a 1M-token context window and up to 128K output tokens, and is available on the Claude API as claude-haiku-5-5 and on AWS, Google Cloud and Microsoft Azure. Anthropic’s announcement does not say whether the Claude apps’ free plan uses it. For harder agentic coding, Anthropic still points to Sonnet 5.5 and Opus 5.5; see Claude Sonnet 5.5<\/a> y Claude Opus 5.5<\/a>, or estimate a monthly bill with the Calculadora de costos de API de IA<\/a>.<\/p>","protected":false},"excerpt":{"rendered":" What is Claude Haiku 5.5? Claude Haiku 5.5 is Anthropic’s smallest and fastest current model, released on 7 October 2026 [\u2026]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"cm_developer":"Anthropic","cm_model_type":"Fast \/ high-volume","cm_modality":"Text, vision","cm_parameters":"Undisclosed","cm_context_window":"1M","cm_max_output":"128K","cm_license":"Proprietary","cm_open_weights":"no","cm_release_date":"2026-10","cm_input_price":"0.10","cm_output_price":"0.50","cm_api_providers":"Anthropic API, AWS, Google Cloud, Microsoft Azure","cm_vram_fp16":"","cm_vram_q4":"","cm_min_gpu":"","cm_benchmarks":"Anthropic-reported: GDPval-AA v2.1 1620 Elo; OSWorld 2.1 (offline subset) 72.4%; Humanity's Last Exam 45.9% (no tools), 57.4% (with tools); Terminal-Bench 4.0 39.2%; FrontierCode 1.1 (Main) 46.4%. 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