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- GPT-5.3-CodexOpenAIRemove
| Attribute | GPT-5.3-Codexgpt-5.3-codex |
|---|---|
| Pricing | |
| Input | $1.75 / 1M |
| Output | $14.00 / 1M |
| Cache Write (5m) | $1.75 / 1M |
| Cache Write (1h) | $1.75 / 1M |
| Cache Read | $1.75 / 1M |
| Web Search | $0 / 1M |
| Context | |
| Max context | 400K |
| Max output | N/A |
| Capabilities | |
| Vision | Yes |
| Function Calling | Yes |
| JSON Mode | Yes |
| Streaming | Yes |
| Catalogue | |
| Provider | OpenAI |
| Category | chat |
| Charge type | Pay As You Go |
| Released | — |
| Description | |
| Summary | GPT-Codex-5.3 is OpenAI's most advanced agentic coding model, designed for software engineering workflows that extend beyond single prompts into long-running, tool-driven execution. It combines the frontier coding performance of earlier Codex models with stronger reasoning and professional knowledge capabilities, enabling reliable handling of complex refactors, multi-step debugging, research-driven development, and autonomous task execution. Optimized for developer productivity, GPT-Codex-5.3 supports interactive collaboration during execution, allowing users to steer tasks in real time without losing context. With improved agentic reliability, faster inference, and stronger performance on long-horizon engineering tasks, it is well suited for coding agents, IDE and CLI workflows, and end-to-end software development pipelines where persistence, tool use, and execution continuity are critical. |