GPT-5.3-Codex Can Now Run a Computer — Not Just Write Code

[cryptohog]

OpenAI’s GPT-5.3-Codex is more than a coding assistant. The new version can operate a computer end-to-end, handling tasks developers would normally do manually.

Key highlights:

25% faster than GPT-5.2 and uses fewer tokens, allowing longer, complex workflows.

Supports human collaboration mid-flow, so users can redirect it without waiting for tasks to finish.

Scored strongly on benchmarks for coding, computer-use tasks, and knowledge work across 44 occupations.

Self-building capability: early versions helped debug and deploy themselves — a first for OpenAI models.

Available to all paid ChatGPT plans via app, CLI, IDE extension, and web, GPT-5.3-Codex represents a step toward AI agents that don’t just write code — they use it to complete meaningful work autonomously.

[madtrader]

human collaboration mid-flow is huge, no more “stop everything while i redirect you”