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  • Simon Willison’s Weblog: openai/codex

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/16/openai-codex/ Source: Simon Willison’s Weblog Title: openai/codex Feedly Summary: openai/codex Just released by OpenAI, a “lightweight coding agent that runs in your terminal". Looks like their version of Claude Code. Tags: ai-assisted-programming, generative-ai, ai-agents, openai, ai, llms AI Summary and Description: Yes Summary: OpenAI’s recently released lightweight coding agent, integrated into the terminal,…

  • Simon Willison’s Weblog: Quoting Hamel Husain

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/15/hamel-husain/ Source: Simon Willison’s Weblog Title: Quoting Hamel Husain Feedly Summary: The single most impactful investment I’ve seen AI teams make isn’t a fancy evaluation dashboard—it’s building a customized interface that lets anyone examine what their AI is actually doing. I emphasize customized because every domain has unique needs that off-the-shelf tools rarely…

  • Simon Willison’s Weblog: GPT-4.1: Three new million token input models from OpenAI, including their cheapest model yet

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/14/gpt-4-1/ Source: Simon Willison’s Weblog Title: GPT-4.1: Three new million token input models from OpenAI, including their cheapest model yet Feedly Summary: OpenAI introduced three new models this morning: GPT-4.1, GPT-4.1 mini and GPT-4.1 nano. These are API-only models right now, not available through the ChatGPT interface (though you can try them out…

  • Simon Willison’s Weblog: Note on 14th April 2025

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/14/believe/ Source: Simon Willison’s Weblog Title: Note on 14th April 2025 Feedly Summary: Believing AI vendors who promise you that they won’t train on your data is a huge competitive advantage these days. Tags: llms, generative-ai, ai AI Summary and Description: Yes Summary: The assertion regarding AI vendors’ claims about not training on…

  • Simon Willison’s Weblog: Using LLMs as the first line of support in Open Source

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/14/llms-as-the-first-line-of-support/ Source: Simon Willison’s Weblog Title: Using LLMs as the first line of support in Open Source Feedly Summary: Using LLMs as the first line of support in Open Source From reading the title I was nervous that this might involve automating the initial response to a user support query in an issue…

  • Simon Willison’s Weblog: Quoting Andrew Nesbitt

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/12/andrew-nesbitt/#atom-everything Source: Simon Willison’s Weblog Title: Quoting Andrew Nesbitt Feedly Summary: Slopsquatting — when an LLM hallucinates a non-existent package name, and a bad actor registers it maliciously. The AI brother of typosquatting. Credit to @sethmlarson for the name — Andrew Nesbitt Tags: ai-ethics, slop, packaging, generative-ai, supply-chain, ai, llms, seth-michael-larson AI Summary…

  • Simon Willison’s Weblog: llm-fragments-rust

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/11/llm-fragments-rust/#atom-everything Source: Simon Willison’s Weblog Title: llm-fragments-rust Feedly Summary: llm-fragments-rust Inspired by Filippo Valsorda’s llm-fragments-go, Francois Garillot created llm-fragments-rust, an LLM fragments plugin that lets you pull documentation for any Rust crate directly into a prompt to LLM. I really like this example, which uses two fragments to load documentation for two crates…

  • Simon Willison’s Weblog: Quoting Drew Breunig

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/10/drew-breunig/#atom-everything Source: Simon Willison’s Weblog Title: Quoting Drew Breunig Feedly Summary: The first generation of AI-powered products (often called “AI Wrapper” apps, because they “just” are wrapped around an LLM API) were quickly brought to market by small teams of engineers, picking off the low-hanging problems. But today, I’m seeing teams of domain…

  • Simon Willison’s Weblog: LLM pricing calculator (updated)

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/Apr/10/llm-pricing-calculator/#atom-everything Source: Simon Willison’s Weblog Title: LLM pricing calculator (updated) Feedly Summary: LLM pricing calculator (updated) I updated my LLM pricing calculator this morning (Claude transcript) to show the prices of various hosted models in a sorted table, defaulting to lowest price first. Amazon Nova and Google Gemini continue to dominate the lower…