GPT-5.3 Codex
OpenAI first-party · 400,000 ctx · from $1.75 input / $14 output per 1M tokens
- Input price ranks #358 of 447 priced models (cheaper = better).
- Cheaper alternative with ≥ same context: Google Gemini Flash Latest at $1.5 input.
| Provider | OpenAI |
|---|---|
| Family | gpt-codex |
| Context window | 400,000 |
| Max output | 128,000 |
| Input price | $1.75 |
| Output price | $14 |
| Cache read | $0.175 |
| Cache write | — |
| Reasoning | Yes |
| Tool calling | Yes |
| Vision | Yes |
| Open weights | No |
| Knowledge cutoff | 2025-08-31 |
| Released | 2026-02-05 |
| Last updated | 2026-02-05 |
Available from 2 curated sources
| Source | Input | Output |
|---|---|---|
| OpenAI first-party | $1.75 | $14 |
| OpenRouter | $1.75 | $14 |
Identity: OpenAI; data via models.dev + OpenRouter public APIs. Always confirm on the provider's official pricing page.