OpenAI launches new agentic coding model only minutes after Anthropic drops its own

The new model is build to accelerate the capabilities of Codex, the agentic coding tool OpenAI launched earlier this week.

OpenAI releases GPT-5.3-Codex, a coding model that helped build itself

Anthropic, one of OpenAI's chief rivals, also released a new coding model today, Claude Opus 4.6. Earlier this week, OpenAI ...

Anthropic's Claude Opus 4.6 brings 1M token context and 'agent teams' to take on OpenAI's Codex

Anthropic has launched Claude Opus 4.6 with a 1M-token context window, multi-agent “agent teams” in Claude Code, and new API ...

OpenAI’s GPT-5.3-Codex drops as Anthropic upgrades Claude — AI coding wars heat up ahead of Super Bowl ads

OpenAI launched GPT-5.3-Codex as Anthropic released Claude Opus 4.6 in a simultaneous drop that kicks off the AI coding wars, ...
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GitHub Adds Claude Code and OpenAI Codex to Agent HQ Platform

GitHub has launched Agent HQ, adding Anthropic's Claude Code and OpenAI's Codex alongside Copilot for Pro+ and Enterprise ...