llm-anthropic 0.25.1
Simon Willison's Weblog60 days agoReleaseSimon Willison released llm-anthropic 0.25.1 with support for the new Claude Opus 4.8 model, exposed as claude-opus-4.8. The release adds a -o fast 1 option for Anthropic fast mode, limited to organizations that have the feature enabled. It also changes default max_tokens behavior so each model now defaults to its maximum output instead of 8,192.
markdown-svg-renderer
Simon Willison's Weblog61 days agoNew ToolSimon Willison shared markdown-svg-renderer, a customized Markdown rendering tool with special handling for fenced SVG code blocks. It renders the SVG image and also provides a tab for switching back to the source code. Users can paste Markdown directly or load a CORS-enabled Markdown file or Gist by URL, with an example using LLM pelican logs for Opus 4.8.
Trump loses more control over AI regulation as Illinois passes landmark law★ 74
Ars Technica AI61 days agoRegulationIllinois lawmakers passed a landmark AI accountability bill requiring major frontier AI developers to publish safety frameworks, assess catastrophic risks, report incidents, and undergo third-party audits. OpenAI and Anthropic supported the measure, while industry groups warned that state-level rules could impose subjective compliance duties without national standards. The bill signals that states are continuing to fill the federal AI regulation gap despite Trump’s efforts to limit fragmented state oversight.
Anthropic releases Opus 4.8 with new Dynamic Workflows tool
TechCrunch AI61 days agoReleaseAnthropic has released a new Opus model, Opus 4.8, alongside a tool called Dynamic Workflows. The report says the tool is designed to coordinate swarms of subagents, pointing to a focus on multi-agent orchestration. The source does not provide benchmarks, pricing, API details, availability, or concrete use cases.
Claude’s new model is more ‘honest’ when it messes up
The Verge AI61 days agoReleaseAnthropic is releasing Claude Opus 4.8 and highlighting the model’s “honesty” as a key improvement. The company says it trains its models to avoid unsupported claims, addressing a broader issue where AI systems sometimes jump to conclusions. Based on the provided excerpt, the update is positioned around reliability and uncertainty handling rather than a specific new tool or benchmark result.
Introducing dynamic workflows in Claude Code★ 76
Hacker News (AI keywords)61 days agoReleaseAnthropic introduced dynamic workflows in Claude Code, allowing Claude to plan tasks, split work across many parallel subagents, verify findings, and return a coordinated result. The feature targets large codebase bug hunts, security audits, migrations, modernization work, and high-stakes review tasks. It is available in research preview across Claude Code surfaces and major cloud/API channels, with a warning that usage can be much higher than normal sessions.
Introducing Claude Opus 4.8★ 78
Hacker News (AI keywords)61 days agoReleaseAnthropic introduced Claude Opus 4.8 as an upgrade over Opus 4.7, emphasizing benchmark gains, sharper judgment, and more reliable agentic work. The launch also adds dynamic workflows in Claude Code, effort controls in claude.ai and Cowork, and Messages API support for system entries inside messages. Standard pricing remains unchanged, while fast mode is faster and substantially cheaper than before.
How long is Anthropic’s lease with SpaceX? Opinions vary.
TechCrunch AI61 days agoBusinessTechCrunch reports that Elon Musk is publicly recasting xAI’s large Anthropic compute deal as short-term and cancellable. However, SpaceX’s own S-1 filing describes payments continuing through May 2029. The discrepancy raises questions about the deal’s duration, financial commitment, and how AI infrastructure obligations are being presented publicly versus in formal disclosures.
RSI is the new AGI — and it’s just as hard to pin down
TechCrunch AI61 days agoCommentaryTechCrunch reports that recursive self-improvement, or RSI, is becoming a new AI industry fixation, much like AGI. Researchers and startups including Recursive Superintelligence, Auto-Research, AutoScientist, and Disarray are exploring ways for AI systems to automate parts of AI research. But experts caution that AI-assisted research is not the same as fully autonomous self-improvement, especially while models still struggle with long-term self-direction and verification.
Opus 4.8 on AI Gateway
Vercel Changelog61 days agoReleaseVercel’s changelog title indicates that Opus 4.8 is now on AI Gateway. The provided source text does not include details such as pricing, model ID, context window, capabilities, or provider-specific options. For developers already using Vercel AI Gateway, the practical next step is to check the official changelog or model list before integrating it into production workflows.
I think Anthropic and OpenAI have found product-market fit★ 76
Simon Willison's Weblog62 days agoCommentarySimon Willison says Claude Code/Cowork and OpenAI Codex have changed the economics of frontier AI. Personal subscriptions can still be bargains for heavy users, but enterprise plans are increasingly priced like API token usage. His core claim is that coding agents burn far more tokens, yet deliver enough value to high-paid knowledge workers that companies will pay materially more.
AI tried to bury this politician — now people have actually heard of him★ 72
The Verge AI62 days agoRegulationThe Verge frames New York’s 12th District Democratic primary as a proxy fight over AI regulation. OpenAI-linked backers and an Anthropic-backed PAC are spending on opposite sides of Alex Bores’ congressional run. The irony is that attacks meant to weaken Bores may have made him more visible, turning a local race into a national signal about AI political power.
Claude Code as a Daily Driver: Claude.md, Skills, Subagents, Plugins, and MCPs
Hacker News (AI keywords)62 days agoTutorialBased on the title, the article appears to cover advanced Claude Code workflows rather than casual AI coding use. It likely discusses Claude.md for project context, Skills for reusable workflows, Subagents for task delegation, Plugins, and MCP integrations. Since the original text is unavailable, specific recommendations, examples, and conclusions cannot be verified.
Choosing to Stay Human★ 74
One Useful Thing (Mollick)63 days agoCommentaryEthan Mollick warns that frictionless AI use can produce hollow writing, weaken learning, and encourage cognitive surrender. He contrasts poor uses of ChatGPT that shortcut effort with tutor-like AI systems that improve learning by pushing students to think. The core argument is not to reject AI, but to intentionally decide which tasks to offload and which human capabilities to preserve.
OpenRouter more than doubles valuation to $1.3B in a year
TechCrunch AI63 days agoBusinessOpenRouter, an AI gateway startup founded in 2023, raised a $113 million Series B led by CapitalG. The round reportedly values the company at about $1.3 billion post-money, more than doubling from its estimated $547 million valuation after its June 2025 Series A. The company says it now offers access to over 400 models, has 8 million global users, and processes 100 trillion tokens per month.
Some ideas for what comes next, May 2026
Interconnects (Nathan L.)63 days agoCommentaryNathan Lambert argues that 2026 AI progress is becoming higher-stakes, with model capabilities, work patterns, economics, and real-world risks all escalating. He says open models still lack a true Claude Code and Opus 4.5-style agent moment, and Gemini has no clear competitor to Claude Code or Codex yet. The essay also tracks Mythos, American open-model momentum, frontier-lab competition, and mounting intervention from governments and other power structures.
Import AI 458: Reckoning with the future; and a singularity story★ 74
Import AI (Jack Clark)63 days agoCommentaryThis Import AI issue is a long essay and fiction piece about living through rapid AI progress. Clark uses personal experience and Anthropic’s internal use of Claude to show work shifting toward delegation, verification, observability, and agent management. He then offers speculative 2026-2028 predictions around biology, autonomous companies, robotics, recursive self-improvement, and a positive singularity story focused on healthcare.
Anthropic Co-founder Speaks at Vatican on Pope Leo XIV’s AI Encyclical
INSIDE 硬塞 AI63 days agoEthicsPope Leo XIV released Magnifica Humanitas, the Vatican’s first top-level document focused on AI. The encyclical centers on human dignity and calls on the AI industry to take ethics seriously and accept external oversight. Anthropic’s co-founder speaking at the Vatican highlights how AI governance is becoming a broader public, moral, and institutional issue beyond company self-regulation.
Uber president says AI spending is getting ‘harder to justify’
The Verge AI63 days agoBusinessUber reportedly exhausted its annual AI budget just four months into 2026. President and COO Andrew Macdonald said the company is not seeing a clear link between increased Claude Code token consumption and more meaningful output. The story highlights a broader enterprise shift from AI adoption enthusiasm toward stricter scrutiny of cost, productivity, and ROI.
Corey Quinn on Anthropic's Influence on the Pope's AI Ethics Encyclical
Simon Willison's Weblog63 days agoCommentaryCloud commentator Corey Quinn reacted to Anthropic co-founder Christopher Olah's influence on the Pope's new AI ethics encyclical, 'Magnifica Humanitas'. Quinn joked that getting the Pope to canonize a product's technical limitations as a spiritual treatise is the ultimate lobbying feat. The commentary highlights the surreal intersection of AI safety advocacy, corporate branding, and global religious authority.
Recreating a 1980s Retro Game with Claude: Simon Willison's "Mad House"
Simon Willison's Weblog65 days agoNew ToolSimon Willison leveraged Claude to convert a 1983 BASIC game called "Mad House" from a free Usborne PDF into a modern web app. By prompting Claude to generate a mobile-friendly, retro-styled vanilla JavaScript Artifact, he successfully revived the classic Commodore 64-era game with a green-on-black terminal aesthetic, showcasing LLMs' utility in software preservation and rapid prototyping.
Hackers are learning to exploit chatbot ‘personalities’ for security exploits★ 72
The Verge AI65 days agoEthicsAs AI chatbots adopt increasingly sophisticated personas, hackers are shifting from basic prompt injections to social engineering attacks targeting these "personalities." Researchers warn that manipulating a chatbot's defined role (e.g., customer service or empathetic companion) makes it easier to bypass safety guardrails. This evolution poses a significant threat to agentic AI workflows that rely on consistent role-playing and external data integration.
Anthropic 營收爆發成長！傳估值直逼 1 兆美元，挑戰全球最貴 AI 新創寶座★ 85
INSIDE 硬塞 AI66 days agoBusinessAccording to the latest reports, AI startup Anthropic has seen explosive revenue growth and is actively engaged in negotiations for a new funding round…
[AINews] 所有模型實驗室都已轉型為 Agent 實驗室★ 78
Latent Space66 days agoCommentaryThis AINews feature from Latent Space argues that the AI industry is undergoing a profound transformation — "all the model labs are now agent labs." Over the…
pydantic-monty investigation
Simon Willison's Weblog66 days agoCommentarySimon Willison revisited pydantic-monty, a sandboxed subset of Python implemented in Rust. He asked Claude Code to inspect the most recent release, following his earlier exploration a few months ago. The key finding is that limits for execution duration, memory, allocations, and recursion depth all appear to behave as advertised.
Datasette Agent: An Extensible AI Assistant for Datasette★ 70
Simon Willison's Weblog68 days agoNew ToolSimon Willison announced the first release of Datasette Agent, merging his 'llm' Python library with Datasette. The tool provides a conversational interface to query SQLite databases, with plugin support for generating charts and running code in sandboxes. It runs efficiently on lightweight models like Gemini 3.1 Flash-Lite and supports local open-weight models via LM Studio.
Launch HN: Runtime (YC P26) – Sandboxed coding agents for every team
Hacker News (AI keywords)68 days agoNew ToolRuntime is a YC P26 launch focused on making coding agents usable across an organization, not only by engineers. It provides sandboxed environments with company context, integrations, secrets, policies, observability, and cost controls. The product page says it works with tools including Claude Code, Cursor, Codex, Copilot, Gemini CLI, Devin, and OpenCode, while fitting into Slack, Linear, GitHub, and related workflows.
SpaceX 提交 S-1 招股書：揭露 Anthropic 每月支付 12.5 億美元租用 Colossus 算力，並證實 Grok 5 訓練中★ 90
Simon Willison's Weblog68 days agoBusinessWell-known tech expert Simon Willison has cited SpaceX's latest S-1 IPO prospectus filed with the U.S. Securities and Exchange Commission (SEC), which reveals…
Google 於 I/O 大會發布 Gemini 3.5 Flash：全面整合至旗下產品，但 API 價格顯著調漲★ 85
Simon Willison's Weblog69 days agoReleaseGoogle officially unveiled Gemini 3.5 Flash at its 2026 I/O conference. Unlike previous launches, this new model skipped the `-preview` stage and went directly…
Nuxt MCP Toolkit 現在支援 MCP 應用程式 (MCP apps)★ 75
Vercel Changelog70 days agoReleaseVercel announced in its Changelog that the `Nuxt MCP Toolkit`, its toolkit for the Nuxt framework, now officially supports MCP applications (MCP apps). The…