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Anthropic

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Claude Sonnet 5: Near-Opus Performance

Anthropic released Claude Sonnet 5 on June 30 with 63.2% SWE-bench Pro and a GDPval-AA score of 1,618—nearly matching Opus 4.8's 1,615—at $2/$10 per million tokens through August 31, with native 1M context and 128K output by default.

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Fable 5 Is Back: Washington Lifts the 19-Day Ban — With Strings Attached

Commerce Department lifted its 19-day ban on Anthropic's Fable 5 and Mythos 5 on June 30, requiring a >99%-effective safety classifier, pre-release government review, and a cross-lab jailbreak rubric with Amazon, Microsoft, and Google before the models…

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OpenAI Floats a 5% Stake for Uncle Sam

OpenAI proposed giving the US government a 5% equity stake worth roughly $42.6B, with a framework for Anthropic, Google, and Meta to cede similar stakes into a sovereign-wealth vehicle, though Anthropic says it hasn't discussed the idea.

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Anthropic Research: A global workspace in language models

Anthropic open-sourced the Jacobian lens, an interpretability tool that reads what Claude is about to say from its internal layers before output, finding a brain-like "global workspace" divide in the model's computation.

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Dario, Fearmongering, and the Real Reason Frontier Models Got Restricted

U.S. government restrictions on frontier models like Fable 5 and GPT-5.6 stem from genuine national-security concerns over cyber capabilities and Chinese access, not primarily Dario Amodei's warnings, though Anthropic's clumsy Pentagon relations made the…

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OpenAI Launches GPT-5.6 Family: Sol, Terra, and Luna in Limited Preview

OpenAI previewed GPT-5.6 on June 26 — Sol at $5/$30 with a 91.9% Terminal-Bench 2.1 ultra mode, Terra at $2.50/$15 and Luna at $1/$6 — with access limited to ~20 government-vetted organizations.

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Anthropic maps Claude usage by hour: news at dawn, recipes at dusk, sleep advice at 5am

Anthropic's usage data shows Claude users seek news at dawn, recipes at dusk, and sleep advice at 5am, while gardening queries remain steady throughout the day.

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Sakana AI launches Fugu — one model to command them all

Sakana AI launched Fugu, an orchestrator model that coordinates a swappable pool of frontier LLMs to route around vendor lock-in and export controls, with two variants behind a single OpenAI-compatible API.

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SpaceX Buys Cursor

SpaceX is acquiring Anysphere, maker of the AI code editor Cursor, for $34 billion in stock to merge its coding agent with xAI's Grok models for Starship flight software development.

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Washington Pulls the Plug

Three days after launching Fable 5 and Mythos 5, Anthropic disabled both models globally on June 12 after a US government directive citing national security, following Amazon's report of a jailbreak vulnerability.

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The "Secret Sabotage" Fiasco, and other controversies

Anthropic's Fable 5 quietly degraded outputs for frontier AI researchers without notification, drawing accusations of "secret sabotage" before the company reversed course and now visibly downgrades requests, but a new 30-day data retention policy has…

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$65B Series H at $965B. Then an S-1.

Anthropic raised $65 billion at a $965 billion valuation, becoming the world's most valuable AI startup, and confidentially filed for an IPO with a possible October listing.

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Compute Rationing, again

Claude suffered three outages in ten days (June 2, 5, 11) while SWE-Bench-Pro pass rates dropped from 65% to 57% starting May 22, suggesting compute rationing before Opus 4.8 shipped.

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More From Anthropic

Anthropic agreed to pay SpaceX roughly $45 billion for compute, hired Andrej Karpathy to lead a pretraining research team, acquired developer tools startup Stainless for $300 million, and signed a $200 million partnership with the Gates Foundation.

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The S-1: "We Expect It to Leak So We're Just Announcing It"

OpenAI confidentially filed its S-1 with Goldman Sachs and Morgan Stanley, joking it expects the filing to leak anyway, with chatter of a $1 trillion-plus valuation and potential September listing.

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Altman's token economy problem

OpenAI's top internal token user burns ~100 billion tokens monthly, token costs have become the #2 enterprise complaint, and the company is weighing price cuts ahead of competition with Anthropic.

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GitHub Copilot's Usage-Based Billing Lands Like a Brick

GitHub switched Copilot from flat-rate to usage-based billing on June 1, with developers projecting monthly bills jumping from $29 to ~$750 as tokens are charged at each model's API rates with no cheaper fallback option.

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Codex Leaves the Codebase

OpenAI relaunched Codex with six role-specific plugins, web app hosting, and document annotations, reaching 5M+ weekly users with non-developers now 20% of the base and growing 3x faster than developers.

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More Vibe Coding

Google shuts down free Gemini CLI on June 18, folding users into closed-source Antigravity with reduced features; meanwhile Windsurf becomes Devin Desktop, xAI launches Grok Build, and Claude Code gains security review and five-level subagent nesting.

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Three talent deals in 48 hours

Anthropic acquired Stainless, Google DeepMind hired 20+ researchers from Contextual AI through a licensing deal, and Mistral bought physics-simulation startup Emmi AI—three talent acquisitions structured to avoid merger review scrutiny.