OpenAI announced today the release of GPT-5.3-Codex, its most capable agentic AI coding model to date. The model combines GPT-5.2-Codex coding performance and GPT-5.2 reasoning capabilities, runs 25% faster, and can perform long-running research and tool-using tasks; OpenAI also used early model versions to accelerate development. It is available to paid ChatGPT users across app, CLI, IDE, and web, with API access forthcoming.
Key Points
- 1Launches GPT-5.3-Codex as an agentic coding model with improved reasoning and professional knowledge
- 2Delivers 25 percent speed improvement enabling longer-running tasks involving research, tool use, and complex execution
- 3Enables practitioners to integrate lifecycle work—debugging, deployment, tests, docs—across app, CLI, IDE, and web
Scoring Rationale
Significant official product release with broad developer applicability; improvement is substantial but incremental rather than paradigm-shifting.
Sources
Public references used for this report.
Practice with real Logistics & Shipping data
90 SQL & Python problems · 15 industry datasets
Used by DS/ML engineers at top companies
High-Value Overnight OrdersEasyDelivered International ShipmentsMediumOn-Time Delivery Rate by CarrierHard
250 free problems · No credit card
See all Logistics & Shipping problems
