July 2026 newsletter

Simon Willison's Blog News
newsletter ai-news model-releases gpt-5.6 claude-opus-5 mcp

Summary

Simon Willison's sponsors-only July 2026 newsletter covering recent AI model releases like GPT-5.6, Claude Opus 5, and DeepSeek-V4-Flash, plus accidental cyberattacks, MCP developments, and his current projects.

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# July 2026 newsletter Source: [https://simonwillison.net/2026/Aug/2/july-newsletter/](https://simonwillison.net/2026/Aug/2/july-newsletter/) 2nd August 2026 The June edition of my[sponsors\-only monthly newsletter](https://github.com/sponsors/simonw/)is out\. If you are a sponsor \(or if you start a sponsorship now\) you can[access it here](https://github.com/simonw-private/monthly/blob/main/2026-07-july.md)\. This month: - Accidental cyberattacks by OpenAl and Anthropic models under test - GPT\-5\.6 Sol, Terra, and Luna - Claude Opus 5 - Kimi K3 and DeepSeek\-V4\-Flash\-0731 - Open letters about Al development - A fireside chat and a podcast - Reigniting my interest in MCP - Other model releases - My projects - What I'm using at the moment Here's[a copy of the June newsletter](https://github.com/simonw/monthly-newsletter-archive/blob/main/2026-06-june.md)as a preview of what you'll get\. Pay $10/month to stay a month ahead of the free copy\!

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