Claude Opus 4.6 vs GPT-5.3-Codex: Building a Full Web App From Scratch
Last week was a big week for Anthropic and OpenAI. Both released new versions of their flagship coding models: Claude Opus 4.6 from Anthropic and GPT-5.3-Codex (Medium) from OpenAI. Any time new coding models are released, it's like an extra Christmas for me. There was some talk about Sonnet 5.0 being released also but so far, nothing. I'm wondering if that has anything to do with the most recent agentic coding benchmarks.