ChatGPT 5.3 Codex Moves Ahead on Code, While Claude’s 4.6 AI Banks on Reliability

On a 2.0 terminal benchmark, OpenAI’s model scores about 10% higher, guiding users toward stronger results on long, complex ...

ChatGPT-5.3 Codex & Claude Opus 4.6 Launch Offering Unmatched Coding Speed or Long Recall Depth

Claude Opus 4.6 and ChatGPT 5.3 Codex launch with a 1-million-token window and 25% faster runs, letting you match tasks to ...

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, ...

Claude Opus 4.6 vs GPT-5.3 Codex: Who is leading the coding agent race

The race to build the ultimate AI coding agent has entered a more mature, more revealing phase. With fresh releases from Anthropic and OpenAI, the competition is no longer about flashy demos or clever ...

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 controls—escalating its enterprise AI rivalry with OpenAI’s Codex and ...

OpenAI launches GPT‑5.3-Codex as AI race heats up after Anthropic’s Claude Opus 4.6 — all you need to know

Sam Altman-led OpenAI launched GPT-5.3-Codex, which is a fast, agentic model that it believes goes beyond coding and can ...