{"id":94413,"date":"2026-02-18T15:46:23","date_gmt":"2026-02-18T12:46:23","guid":{"rendered":"https:\/\/forklog.com\/en\/?p=94413"},"modified":"2026-02-18T15:50:18","modified_gmt":"2026-02-18T12:50:18","slug":"anthropic-unveils-claude-sonnet-4-6-with-a-million-token-context-window","status":"publish","type":"post","link":"https:\/\/forklog.com\/en\/anthropic-unveils-claude-sonnet-4-6-with-a-million-token-context-window\/","title":{"rendered":"Anthropic Unveils Claude Sonnet 4.6 with a Million-Token Context Window"},"content":{"rendered":"<p>Anthropic has released an updated mid-level AI model, Sonnet, focusing on programming skills, instruction adherence, and computer operation.<\/p>\n<blockquote class=\"twitter-tweet\">\n<p lang=\"en\" dir=\"ltr\">This is Claude Sonnet 4.6: our most capable Sonnet model yet.<\/p>\n<p>It\u2019s a full upgrade across coding, computer use, long-context reasoning, agent planning, knowledge work, and design.<\/p>\n<p>It also features a 1M token context window in beta. <a href=\"https:\/\/t.co\/TDId3XUSRs\">pic.twitter.com\/TDId3XUSRs<\/a><\/p>\n<p>\u2014 Claude (@claudeai) <a href=\"https:\/\/twitter.com\/claudeai\/status\/2023817132581208353?ref_src=twsrc%5Etfw\">February 17, 2026<\/a><\/p><\/blockquote>\n<p> <script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p>The neural network is now available by default for users on Free and Pro plans.<\/p>\n<p>In its beta version, the <span data-descr=\"large language model\" class=\"old_tooltip\">LLM<\/span> features a context window of 1 million tokens, doubling previous limits. Anthropic noted that the model can &#8220;accommodate entire codebases, extensive contracts, and dozens of scientific articles in a single prompt.&#8221;\u00a0<\/p>\n<p>The release is accompanied by new records in benchmarks such as OSWorld (computer operation) and SWE-Bench (programming tasks).<\/p>\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"520\" src=\"https:\/\/forklog.com\/wp-content\/uploads\/img-cd74c56a549b8164-6634798846168792-1024x520.png\" alt=\"image\" class=\"wp-image-275354\" srcset=\"https:\/\/forklog.com\/wp-content\/uploads\/img-cd74c56a549b8164-6634798846168792-1024x520.png 1024w, https:\/\/forklog.com\/wp-content\/uploads\/img-cd74c56a549b8164-6634798846168792-300x152.png 300w, https:\/\/forklog.com\/wp-content\/uploads\/img-cd74c56a549b8164-6634798846168792-768x390.png 768w, https:\/\/forklog.com\/wp-content\/uploads\/img-cd74c56a549b8164-6634798846168792-1536x779.png 1536w, https:\/\/forklog.com\/wp-content\/uploads\/img-cd74c56a549b8164-6634798846168792.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Steady growth in Sonnet versions&#8217; performance in OSWorld. Source: Anthropic.<\/figcaption><\/figure>\n<p>In the ARC-AGI-2 benchmark, which assesses abstract thinking capabilities, Sonnet 4.6 scored 60.4%. This performance surpasses most competitors, trailing only Opus 4.6, Gemini 3 Deep Think, and a refined version of GPT 5.2.<\/p>\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"1024\" src=\"https:\/\/forklog.com\/wp-content\/uploads\/img-b346025b749962fb-6634813040798352-900x1024.png\" alt=\"image\" class=\"wp-image-275355\" srcset=\"https:\/\/forklog.com\/wp-content\/uploads\/img-b346025b749962fb-6634813040798352-900x1024.png 900w, https:\/\/forklog.com\/wp-content\/uploads\/img-b346025b749962fb-6634813040798352-264x300.png 264w, https:\/\/forklog.com\/wp-content\/uploads\/img-b346025b749962fb-6634813040798352-768x874.png 768w, https:\/\/forklog.com\/wp-content\/uploads\/img-b346025b749962fb-6634813040798352-1349x1536.png 1349w, https:\/\/forklog.com\/wp-content\/uploads\/img-b346025b749962fb-6634813040798352.png 1799w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><figcaption class=\"wp-element-caption\">Sonnet 4.6&#8217;s performance in various benchmarks compared to other solutions. Source: Anthropic.<\/figcaption><\/figure>\n<p>Earlier in February, the startup <a href=\"https:\/\/forklog.com\/en\/news\/claude-opus-4-6-surpasses-gpt-5-2-in-logic-tests-and-introduces-agent-teams\">upgraded<\/a> its flagship model Claude Opus to version 4.6. The neural network improved in planning actions, handling long tasks, and working more efficiently with large codebases.<\/p>\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cPerformance that previously required an Opus-level model\u2014including real office tasks with economic value\u2014is now available in Sonnet 4.6,\u201d the company blog states.<\/p>\n<\/blockquote>\n<p>Later, the firm reported raising $30 billion at a valuation of $380 billion. The funds will be directed towards \u201cadvanced research, product development, and infrastructure expansion.\u201d<\/p>\n<p><script async src=\"https:\/\/telegram.org\/js\/telegram-widget.js?22\" data-telegram-post=\"forklogAI\/6747\" data-width=\"100%\"><\/script><\/p>\n<p>Anthropic announced a comprehensive safety assessment of Sonnet 4.6\u2014the new LLM \u201csignificantly outperforms\u201d its predecessor in resistance to <span data-descr=\"an attack where someone (or something) causes an LLM to violate its system instructions\" class=\"old_tooltip\">prompt injections<\/span>.<\/p>\n<p>Back in February, <a href=\"https:\/\/forklog.com\/en\/news\/wsj-u-s-military-used-claude-in-raid-to-capture-maduro\">media reported the use<\/a> of the AI tool Claude in a military operation to capture Venezuelan President Nicol\u00e1s Maduro.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Anthropic has released an updated AI model, Sonnet, focusing on programming skills, instruction adherence, and computer operation.<\/p>\n","protected":false},"author":1,"featured_media":94414,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"select":"1","news_style_id":"1","cryptorium_level":"","_short_excerpt_text":"Anthropic releases updated AI model Sonnet, focusing on programming and computer skills.","creation_source":"","_metatest_mainpost_news_update":false,"footnotes":""},"categories":[3],"tags":[1434,438],"class_list":["post-94413","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-and-analysis","tag-anthropic","tag-artificial-intelligence"],"aioseo_notices":[],"amp_enabled":true,"views":"421","promo_type":"1","layout_type":"1","short_excerpt":"Anthropic releases updated AI model Sonnet, focusing on programming and computer skills.","is_update":"","_links":{"self":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/94413","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/comments?post=94413"}],"version-history":[{"count":1,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/94413\/revisions"}],"predecessor-version":[{"id":94415,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/94413\/revisions\/94415"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/media\/94414"}],"wp:attachment":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/media?parent=94413"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/categories?post=94413"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/tags?post=94413"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}