OpenAI: GPT-5.3-Codex
OpenAIGPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance
Long context (400K+)Multimodal vision
TextVision
Specifications
| Vendor | OpenAI |
| Family | openai |
| Context | 400K · 300k words（≈ a novella） |
| Max output | 400K · 300k words（≈ a novella） |
| Released | 2026-06-19 |
| Open source | No |
| Tool use | — |
Pricing across channels
per 1M tokens, USD
| Channel | Type | Input | Output | → |
|---|---|---|---|---|
| OpenRouter (auto) | Aggregator | $1.75 | $14.00 | visitAd |
OpenRouter API (auto-fetched)· 2026-06-19
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