GPT-5 (Thinking) tops the Web Dev @lmarena_ai
, winning ~65% of matchups and losing ~20%. This benchmark focuses on front-end development, fairly simple apps, so it is not representative of all coding. But OpenAI have made huge strides in front-end, given that their previous best
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GPT-5 Thinking dominates web development benchmarks with 65% win rate
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OpenAI Codex CLI Tool Built on Deprecated Model
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Oh no! It uses the "Codex CLI" unofficial name we've been assigning to the http://
GitHub.com/openai/codex tool AND it's called that because it was written against the old (and now long departed) Codex model -
GitHub Copilot brand confusion versus OpenAI Codex
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And to be fair Codex has nothing on Microsoft/GitHub Copilot when it comes to massive brand confusion these days
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Preview Gradio Apps Directly in Browser with Anycoder Vibe Coding
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you can now preview @Gradio apps directly in your browser in anycoder when vibe coding
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OpenAI Codex: Complete Collection of References
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Here's my full collection of things they've called Codex https://
simonwillison.net/2025/May/16/op
enai-codex/
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Codex Asynchronous Coding Agent Web Application Launch
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… which is somewhat ironic given Sam tweeted this the day before they released the Codex asynchronous coding agent web application (the CLI tool had been out for a month by that point)
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OpenAI Codex Naming Confusion: CLI Tool vs Async Agent
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OpenAI's decision to give their Codex CLI tool and their Codex asynchronous coding agent the exact same name means that when people say "have you tried Codex?" i have genuinely no idea which one they are talking about
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MCP Enables Faster n8n Workflow Development Without Starting Over
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This is any day better than starting from scratch in n8n. Amazing to see what MCP has enabled!