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AI Daily Brief — 5 June 2025

Three frontier-lab moves dropped on a single Thursday. Anthropic shipped Claude Gov for the US national-security tier. Cursor’s parent Anysphere closed a $9.9B round. Google reclaimed the LMArena lead with Gemini 2.5 Pro Preview 06-05. Then Trump and Musk broke open over the One Big Beautiful Bill and Tesla lost $152B in a session.

Top stories

  • Anthropic unveils Claude Gov for US national security customers. Custom Claude models already deployed by agencies operating at the highest classified levels. Built with direct feedback from government customers: improved handling of classified materials, enhanced understanding of intelligence and defense documents, proficiency in critical national-security languages and dialects, better interpretation of complex cybersecurity data. via Anthropic
  • Cursor / Anysphere closes $900M Series C at $9.9B valuation, $500M+ ARR. Led by Thrive Capital with a16z, Accel and DST Global. ARR doubling every two months, now exceeds $500M. Anysphere’s third fundraise in under a year; rejected earlier acquisition approaches including from OpenAI. via TechCrunch
  • Google ships Gemini 2.5 Pro Preview 06-05. +24 Elo on LMArena (now 1470, retaining lead) and +35 on WebDevArena (1443). Continues to lead Aider Polyglot coding benchmarks. Top-tier GPQA and Humanity’s Last Exam scores. Improved response style/formatting based on prior feedback. Available via Google AI Studio and Vertex AI with thinking budgets. via Google
  • Trump-Musk feud erupts publicly over the ‘Big, Beautiful Bill.’ Musk called it ‘disgusting abomination’ and urged Congress to block it. Trump said from the Oval Office he was ‘very disappointed in Elon,’ tied Musk’s opposition to the bill’s removal of EV tax credits benefiting Tesla, and posted on Truth Social that terminating Musk’s ‘Governmental Subsidies and Contracts’ would be the easiest way to save billions. Musk retorted on X that without him ‘Trump would have lost the election.’
  • Tesla loses ~$152B in market cap; stock -14.26%. Biggest single-day market-cap hit in Tesla history, pushing the company below $1T to ~$916B. Musk said he was ordering SpaceX to halt its Dragon spacecraft program. via CNBC
  • Windsurf-Anthropic Claude-access cut continues to ricochet. Fallout from Anthropic’s Tuesday decision: Windsurf scrambling for alternate inference providers; Anthropic framed the move as ‘prioritizing capacity for sustainable partnerships,’ but the timing pointed at competitive considerations following OpenAI’s reported $3B Windsurf acquisition. Windsurf never secured direct Claude 4 access.
  • Claude Gov coverage: federal AI race intensifies. Same week as Trump’s rebrand of the US AI Safety Institute, Anthropic’s launch is read as a direct play for classified-environment defense and intelligence workloads — and a counterweight to OpenAI’s federal push. via FedScoop

Who shipped

Anthropic, Google and Anysphere all shipped major moves. OpenAI, Meta, xAI, DeepSeek and Mistral quiet on the model side.

Open-source pulse

No major open-weights drops dated Jun 5. Qwen3-Embedding and Qwen3-Reranker land tomorrow.

Money, infra & hardware

Cursor’s round vindicates AI-coding ‘vibe coders’ as the fastest-growing SaaS category of 2025. SiliconANGLE framed the Anysphere story as confirmation that AI coding assistants had become the breakout consumer-AI application of the year.

Quiet corners

No NVIDIA / AMD product launches on the date. No notable arxiv landmark. Reddit-Anthropic lawsuit coverage from yesterday continued spreading.

By the numbers

  • $900M / $9.9B / $500M+ — Anysphere Series C / valuation / ARR
  • doubling every 2 months — Cursor ARR growth rate
  • 1470 / 1443 — Gemini 2.5 Pro Preview 06-05 LMArena / WebDevArena Elo
  • +24 / +35 — Elo jumps on each leaderboard
  • -14.26% / ~$152B — Tesla single-day stock drop / market-cap loss
  • Most-mentioned company: Anthropic + Cursor + Google

Compiled by AI Feed’s editor from verified web sources for 5 June 2025.