Simon Willison
AI Engineering
AI engineering and LLM developments. Hands-on technical insights and tools.
10 articles in this preview (of 95 total)
Building a tool to copy-paste share terminal sessions using Claude Code for web
View this post on the web at https://simonw.substack.com/p/building-a-tool-to-copy-paste-share In this newsletter: Video: Building a tool to copy-paste share terminal sessions using Claude Code for w...
Claude Code for web - a new asynchronous coding agent from Anthropic
View this post on the web at https://simonw.substack.com/p/claude-code-for-web-a-new-asynchronous In this newsletter: Claude Code for web - a new asynchronous coding agent from Anthropic Getting Deep...
GPT-5-Codex, plus updated Gemini 2.5 Flash and Flash Lite
View this post on the web at https://simonw.substack.com/p/gpt-5-codex-plus-updated-gemini-25 GPT-5-Codex [ https://substack.com/redirect/8bee052e-8a4f-44e9-843b-9c3cb7c9656a?j=eyJ1IjoicXd0ciJ9.0tEpq...
Claude Sonnet 4.5 is probably the “best coding model in the world” (at least for now)
View this post on the web at https://simonw.substack.com/p/claude-sonnet-45-is-probably-the In this newsletter: Claude Sonnet 4.5 is probably the “best coding model in the world” (at least for now) P...
Designing agentic loops
View this post on the web at https://simonw.substack.com/p/designing-agentic-loops In this newsletter: Designing agentic loops Plus 2 links and 1 quotation and 1 TIL and 3 notes Thanks for reading Si...
Embracing the parallel coding agent lifestyle
View this post on the web at https://simonw.substack.com/p/embracing-the-parallel-coding-agent In this newsletter: Embracing the parallel coding agent lifestyle Plus 2 links and 1 note Embracing the...
Vibe engineering
View this post on the web at https://simonw.substack.com/p/vibe-engineering In this newsletter: Vibe engineering OpenAI DevDay 2025 live blog GPT-5 Pro and gpt-image-1-mini Python 3.14 Plus 4 links...
NVIDIA DGX Spark: great hardware, early days for the ecosystem
View this post on the web at https://simonw.substack.com/p/nvidia-dgx-spark-great-hardware-early In this newsletter: NVIDIA DGX Spark: great hardware, early days for the ecosystem Claude can write co...
Claude Skills are awesome, maybe a bigger deal than MCP
View this post on the web at https://simonw.substack.com/p/claude-skills-are-awesome-maybe-a In this newsletter: Claude Skills are awesome, maybe a bigger deal than MCP Plus 3 links and 5 quotations...
Prompt injections as far as the eye can see
View this post on the web at https://simonw.substack.com/p/prompt-injections-as-far-as-the-eye In this newsletter: The Summer of Johann: prompt injections as far as the eye can see Open weight LLMs e...
Get full access to all 95 articles
Join Ads to AI to unlock the complete Simon Willison archive plus 500+ articles from other top sources.
Join Ads to AI →