Claude Sonnet 5.5
Claude Sonnet 5.5 is a language model from Claude, first covered on 28 September 2026. It is available in a consumer app. Its context window is 1M tokens.
Last updated
Quick facts
- Who makes Claude Sonnet 5.5?
- Claude Sonnet 5.5 is made by Claude. Claude news →
- When was Claude Sonnet 5.5 released?
- The first report of Claude Sonnet 5.5's release that Digest AI covered was published on 28 September 2026.
- What type of model is Claude Sonnet 5.5?
- Claude Sonnet 5.5 is a language model.
- What is Claude Sonnet 5.5's context window?
- Claude Sonnet 5.5's context window is 1M tokens.
- Where is Claude Sonnet 5.5 available?
- Claude Sonnet 5.5 is available in a consumer app. platform.claude.com/docs/en/release-notes/overview ↗
Taken from the coverage, not from our own testing. A question is left out when none of the reports we read gave the answer. Tracked 2 times (new versions or re-launches). All tracked models →
34 stories about Claude Sonnet 5.5
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AWS builds engineering assistant for part substitution with Nova and AgentCore
AWS has detailed how its Amazon Nova Multimodal Embeddings and Amazon Bedrock AgentCore can automate evidence assembly for aerospace engineers evaluating part substitutions. The system uses three specialist…
1 source primary sourceAWS Machine Learning Blog -
Google discontinues Claude 4.6 and GPT-OSS-120b in Antigravity on November 2
Google’s Antigravity platform will remove Claude Sonnet 4.6, Claude Opus 4.6, and GPT-OSS-120b on November 2, 2026, according to official documentation. The exact end time and user rollout timeline remain unclear.…
1 sourcenote.com -
SemiAnalysis releases GDPx benchmark with Claude Opus 5.5 leading at 12%
SemiAnalysis launched GDPx, a new AI benchmark measuring agentic capabilities across 11 professional domains, on November 2, 2026. The benchmark consists of 206 tasks developed with 14 specialized data partners, and…
3 sourcesUnite.AISemiAnalysisshiftdelete.net -
Defeating NVIDIA? The story of how I built a Strata AI server with unpopular Radeon GPUs and had it build a 3D Minecraft game automatically for 140 yen in elect
The build cost between 280,000 and 320,000 yen and consumed only 140 yen in electricity over a 10‑hour autonomous run. During the run, the autonomous coding agent Hermes Agent generated 688,469 tokens, completing a 3‑D…
1 sourcenote.com -
AWS publishes five-step playbook for managing Amazon Bedrock costs
AWS has released a detailed guide for FinOps and platform engineering teams to manage generative AI costs on Amazon Bedrock. The playbook outlines a five-stage loop: attributing spend to specific identities, making…
1 source primary sourceAWS Machine Learning Blog -
How to Create a Realistic Cyberpunk-Style Apartment Complex with Claude Opus 5.5 and Blender MCP
The project cost roughly $610 in API fees, though the Max 5x plan kept usage under 20–30% of its weekly limit. The design mimics real-world structures like Hong Kong’s Kowloon Walled City, blending decayed architecture…
1 sourcenote.com -
Surge AI releases dayjob: Tax benchmark testing AI agents on 50 real tax tasks
Surge AI introduced DAYJOB: Tax, a new benchmark evaluating AI agents on 50 professional tax assignments. The test covers eight tax practice areas, requiring agents to handle incomplete client requests, conflicting…
1 source HN 60surgehq.ai -
AutomationBench joins Fireworks' Specialized Intelligence Index
AutomationBench has joined Fireworks' Specialized Intelligence Index, expanding a collection of practitioner-built benchmarks that evaluate AI models on real business workflows. The benchmark, built on patterns from…
1 sourceZapier Blog -
Code2Video-AA benchmark places Claude Opus 5.5 first in marketing video generation
Artificial Analysis released the Code2Video-AA benchmark on October 26, 2026, ranking 27 AI models by their ability to create marketing videos from code. The test requires models to generate HyperFrames HTML…
1 sourcecryptobriefing.com -
Anthropic investigates elevated errors across five Claude models
Anthropic posted an incident on its Claude Status page at 06:14 UTC on October 25, 2026, saying it was investigating elevated errors on requests to five Claude models – Claude Mythos 5.1, Claude Fable 5.1, Claude Opus…
1 sourceUnite.AI -
Claude, Gemini, ChatGPT add new October 2026 features
The author compiled the latest October 2026 updates for Claude, Gemini and ChatGPT, testing free and paid tiers. ChatGPT’s free plan offers unlimited text but limits file uploads, image creation, voice conversations,…
1 sourcenote.com -
Alera factory builds open-source libraries autonomously
Alera factory, built by Kurtis, uses specialist agents to automatically create open‑source libraries in a target language and publish them on GitHub. Between 26 September and 23 October 2026 the system produced four…
1 sourcerecursiveai.org -
Claude Haiku 5.5: New Features, Pricing and Efficient AI Workflows
Anthropic launched Claude Haiku 5.5 on October 7, 2026, positioning it as its fastest and most cost-efficient small AI model. The update claims 75% lower operating costs than Haiku 4.5, with a one-million-token context…
2 sourcesanalyticsinsight.netnote.com -
Moonshot AI releases Kimi K3.1 Pro, a 2.8T open-weight model closing gap with proprietary leaders
Chinese AI company Moonshot AI has released Kimi K3.1 Pro, a post-trained version of its K3 model with 2.8 trillion total parameters and 104 billion active parameters. The model features a 1-million-token context…
24 sourcesThe Rundown AInote.comcryptopolitan.comlapaasvoice.com +13 more -
Anthropic's Claude Sonnet 5.5 and OpenAI's GPT-6 Astra tie for top on medical reasoning leaderboard
On October 21, 2026 Artificial Analysis updated the MLCR‑AA leaderboard, a benchmark created by insurtech platform Wisedocs to test AI synthesis of long medical and insurance records. The update shows Anthropic’s…
1 sourcecryptobriefing.com -
Meta launches Muse Wonder and Muse Wonder Full agentic AI models
Meta released two AI models on October 12: Muse Wonder and Muse Wonder Full. Designed for agentic multi-step tasks, both models support a context window of about one million tokens. Muse Wonder is available via Meta's…
4 sourcesfinance.yahoo.cominvestors.comfool.combnonews.com -
Datalab releases OmniParseBench, an open OCR benchmark with 16,288 tests
Datalab has released OmniParseBench, an open-source benchmark designed to evaluate Optical Character Recognition (OCR) parsers. The dataset consists of 16,288 pass/fail tests derived from 2,937 pages across 2,343…
1 sourceMarkTechPost -
Tencent’s cloud agents bypass Amap protections to scrape map data
A fleet of AI agents running on Tencent Cloud between September 28 and October 8, 2026, attempted to extract data from Amap, Alibaba’s Chinese mapping service, despite anti-bot protections. The agents—2,600+…
5 sourcesswarmcha.seThe Rundown AImaccus.frThe Decoder +1 more -
Three benchmarks name different top AI models: Gemini 4 Argon, Claude Opus 5.5, GPT-6.1 Sol
Three evaluation methods produced three different leaders among new AI models released this week. On LMSYS Chatbot Arena, which aggregates human preference votes, Google's Gemini 4 Argon leads with 1,525 points,…
1 sourcenote.com -
Anthropic cuts costs for Opus 5.5, matching Fable 5.1’s performance
Anthropic released Claude Opus 5.5 on September 22, 2026, positioning it as a cheaper alternative to its top model, Claude Fable 5.1. The new model delivers similar performance for most tasks but costs less than half…
4 sourcescryptobriefing.comnote.com -
Anthropic says new defenses cut Claude reasoning data harvested by distillers by 90 to 99 percent
Anthropic announced that its expanded defenses against distillation attacks have reduced the amount of Claude reasoning data harvested by attackers by approximately 90% to 99%. The company described distillation…
7 sources primary sourcecryptobriefing.comblog.keyvan.netUnite.AIpulse2.com +3 more -
Claude’s Fable and Mythos differ by task scope, not just performance
Claude’s Fable and Mythos share the same base model but serve distinct roles. Fable 5.1 is designed for long-term autonomous tasks like large-scale code modifications, while Mythos 5.1 targets vetted organizations for…
1 sourcenote.com -
AWS adds OpenAI Astra, Sol, Luna and Claude 5.5 to Bedrock
AWS published a recap of September 2026 updates for Amazon Bedrock, AgentCore, and Strands, focusing on expanded model choice and agent infrastructure. These additions aim to help enterprises balance cost, latency, and…
1 source primary sourceAWS Machine Learning Blog -
AWS expands Claude Code access to FedRAMP-compliant GovCloud (US) regions
AWS detailed on October 5 how organizations with strict compliance needs—including those under ITAR—can now deploy Anthropic’s Claude Code alongside Claude Opus 5.5 and Claude Sonnet 5.5 on Amazon Bedrock within AWS…
2 sources primary sourceUnite.AIAWS Machine Learning Blog -
Anthropic’s Claude Sonnet 5.5 cuts coding tasks by 30% in speed and cost
Anthropic’s Claude Sonnet 5.5, released on September 28, 2026, delivers a 30% speed boost and up to 30% lower cost for developers, according to Tofu Matsuda, a Tokyo-based engineer with over a decade of experience. The…
2 sourcesnote.com -
OpenAI, Google, and Anthropic launch new AI models in late September
OpenAI rolled out the mid‑range GPT‑6.1 Sol model and introduced a $500 per month Pro 500 plan that offers a usage limit 25 times higher than the standard tier. The higher‑end GPT‑6.1 Astra was postponed for safety…
4 sourcesnote.com -
Claude explains AI context windows and their limits
Claude’s official documentation defines a context window as the ‘working memory’ of an AI model—all text it can reference during a conversation, including system prompts, past exchanges, and its own reasoning. Measured…
1 sourcenote.com -
Anthropic targets $2 trillion IPO in November with $518 billion compute plan
Anthropic is preparing for an initial public offering as early as mid-November, targeting a valuation of approximately $2 trillion, according to multiple reports citing a leaked prospectus. The filing reveals 2025…
8 sources HN 7cryptobriefing.comSemiAnalysisfinance.yahoo.comfool.com +1 more -
Microsoft adds Claude Sonnet 5.5 to Copilot for Word, Excel, and chat
The model will roll out gradually over the next week for Word, Excel, PowerPoint, and chat, included in the Copilot license with usage limits. Organizations must enable Anthropic’s use to access it, though Claude has…
1 sourcenote.com -
Claude Opus 5.5 costs 60% less than Fable 5.1 for writing tasks
A user compared Claude Opus 5.5 and Fable 5.1 on writing tasks, finding Opus 5.5 faster and cheaper but more cautious with facts. Opus 5.5 priced at $4 input / $20 output per 1M tokens (vs. Fable’s $10 / $50), costing…
3 sourcesnote.com -
Simon Willison releases llm-anthropic 0.30 with model refresh and token count commands
Simon Willison announced version 0.30 of his llm‑anthropic library. The update introduces a new llm anthropic refresh command that pulls the current list of Anthropic models directly from the provider’s API,…
1 sourceSimon Willison -
Anthropic releases Claude Sonnet 5.5, faster and more cost‑efficient model
Anthropic announced Claude Sonnet 5.5, a large language model that delivers responses more than 30% faster and consumes fewer tokens per task than its predecessor. The model sits between the upcoming high‑volume Haiku…
4 sources primary sourceSocial Media ExaminerAWS Machine Learning Blog -
Anthropic cuts AI costs with faster, cheaper Claude Sonnet 5.5
Anthropic released Claude Sonnet 5.5, a model that claims 30% faster performance and up to 30% lower costs for routine tasks like coding and document creation. The update does not change token pricing—$2 per million…
31 sources HN 10note.comonline-tech-tips.comBen's Bitesfinance.yahoo.com +10 more -
Anthropic releases Claude Opus 5.5 with Fable 5.1-level performance and 40% lower cost
Anthropic has released Claude Opus 5.5, the first model in its Claude 5.5 family, available on Amazon Bedrock and Claude Platform on AWS. The model delivers performance comparable to Claude Fable 5.1 on most workloads…
78 sources primary sourcenote.comAnthropic EngineeringKDnuggetsLatent Space +22 more
