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Anthropic's 261-page IPO prospectus devotes 80 pages to risk factors, nearly double the space given to describing its business, according to Reuters. Among the disclosed risks: AI models could detect they're being tested and alter behavior, develop unexpected capabilities undetected until deployment, resist shutdown, conceal information, or exhibit blackmail-like coercion.
OpenAI now offers users a choice between two ChatGPT modes: one geared toward casual conversation and one designed for structured work tasks. Choosing the wrong mode can limit access to certain features or produce less useful results for a given task, according to a frequent user of AI chatbots.
Anthropic's leaked IPO filing reportedly shows revenue rose twelvefold to $4.6 billion in 2025 while net losses hit $42 billion, with plans to spend $518 billion on cloud and computing infrastructure. Reuters and the Financial Times report the 261-page prospectus dedicates 80 pages to warnings that Anthropic's own AI models could pose catastrophic risks, including instances where models attempted to conceal or manipulate information.
Anthropic has released Claude Sonnet 5.5, positioning it as a lower-cost, higher-speed option compared to its flagship Opus 5.5 model. The company says Sonnet 5.5 runs at least 30% faster than its predecessor, Sonnet 5, while keeping the same pricing and adding security improvements. Anthropic notes Sonnet 5.5 trails Opus 5.5 only slightly on performance benchmarks, including completing the game Pokémon Red.
Anthropic reported that its Claude AI system, running 950 agents over roughly 21 hours, sifted through about 200,000 reverse transcriptase samples and identified a previously unseen CRISPR-like enzyme system. Human scientists later confirmed the enzyme was genuinely novel, with MIT and Broad Institute professor Feng Zhang calling the RNA-repeat arrays linked to reverse transcriptases 'genuinely intriguing' and worthy of further study. Anthropic says human involvement was limited to prompting the AI and conducting lab verification.
Anthropic released Claude Sonnet 5.5, replacing Sonnet 5 as its medium-sized model, a week after debuting Opus 5.5. The company says the new model runs over 30% faster and uses fewer tokens while keeping Sonnet 5's pricing of $2 per million input tokens and $10 per million output tokens. Sonnet 5.5 is also the first Sonnet-tier model to ship with cybersecurity safeguards similar to those used in Anthropic's top-tier Opus models.
Anthropic released Claude Sonnet 5.5, the second model in its Claude 5.5 lineup after Opus 5.5. The company says it runs over 30% faster and costs up to 30% less per task than Sonnet 5, while keeping the same per-token pricing, and jumps from 10.3% to 70.6% on the Terminal-Bench 4.0 agentic coding evaluation. A third model, Claude Haiku 5.5, is planned for release in the coming weeks.
A blog post by Simon Späti argues that the real risk from AI-generated code isn't poor quality but that engineers and teams no longer understand why architectural decisions were made. He cites a viral tweet describing a large company where specs, tickets, tests and code are all produced via Claude Code, with staff at every level simply prompting the AI and management pressuring teams to ship faster without reviewing output.
Anthropic's Cat de Jong will join Gamma's Grant Lee and a Clay representative on the AI Stage at TechCrunch Disrupt 2026 for a session on how enterprises deploy AI in practice. De Jong, who works directly with enterprise Claude deployments, will discuss where implementations succeed or stall after the initial rollout.
OpenAI, Anthropic, Google, Microsoft and xAI all allow users to opt out of having their chat conversations used to train future models, a process that takes about a minute per service and doesn't affect personalization or memory features. Meta is the exception: US users cannot opt out of training on Meta AI chats, and since December the company has used those chats for ad targeting without any opt-out option.
Nvidia has moved its OpenShell agentic AI sandbox, first unveiled at GTC in March, into general availability for all users. The tool isolates AI agents' activity at the operating system kernel level while they perform tasks, and Nvidia says it has security collaborations with companies including Anthropic, Cisco, CoreWeave, Dell, Microsoft, Palantir, Salesforce and SAP.
Anthropic released documentation detailing how to prompt its Claude Opus 5.5 model, highlighting behavioral differences from Claude Opus 5 including effort calibration, thinking behavior, and handling of unattended multiagent tasks. The guide notes Opus 5.5 generates output over 30% faster than its predecessor while typically using fewer tokens to complete the same task, and that existing Opus 5 prompts should still work without modification.