AI #155: Welcome to Recursive Self-Improvement
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This was the week of Claude Opus 4.6, and also of ChatGPT-5.3-Codex.
This was the week of Claude Opus 4.6, and also of ChatGPT-5.3-Codex. Both leading models got substantial upgrades, although OpenAI’s is confined to Codex. Once again, the frontier of AI got more advanced, especially for agentic coding but also for everything else. I spent the week so far covering Opus, with two posts devoted to the extensive model card, and then one giving benchmarks, reactions, capabilities and a synthesis, which functions as the central review. We also got GLM-5, Seedance 2.0, Claude fast mode, an app for Codex and much more. Claude fast mode means you can pay a premium…
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