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02/05/2026

-230 days

GPT-5.3-Codex Released

Starts 02/05/2026 CONFIRMED 90% CONFIDENCEOpenAI's^[1][2][3] own model release notes date this entry February 5, 2026

OpenAI launches GPT-5.3-Codex, its most capable agentic coding model, the first to combine the Codex and GPT-5 training stacks.

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Starts 02/05/2026 CONFIRMED 90% CONFIDENCEAnthropic's^[1][2] own announcement, dated the day the model became available.

Anthropic upgrades its smartest model with Claude Opus 4.6, industry-leading across agentic coding, computer use, tool use, search and finance.

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