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 ...

GPT-5.3 Codex Raises the Bar, but Opus 4.6 Still Owns Deep Reasoning

In benchmark tests such as Swaybench Pro and Terminal Bench, GPT-5.3 Codex consistently outperformed its predecessors, setting new standards for speed and execution. When compared to Anthropic’s Opus ...

GitHub Copilot adds GPT-5.3-Codex with 25% faster performance for agentic tasks

Codex. Pro and Enterprise users gain 25% faster agentic task performance. Learn how to enable it today. GitHub has announced ...
Neowin

OpenAI introduces GPT-5-Codex-Mini, a cost-efficient coding model for developers0 0

Back in September, OpenAI announced GPT-5-Codex, a new GPT-5 model that is optimized for agentic coding in Codex. Since GPT-5-Codex is based on GPT-5, it comes with significant upgrades in reasoning, ...