Compare models
Pick up to four models to compare specs and prices side by side. The best context window and lowest price in each row are marked.
| Attribute | GPT-5.3 Instant (gpt-5.3-chat-latest)OpenAI | GPT-5.3-CodexOpenAI |
|---|---|---|
| Overview | ||
| Developer | OpenAI | OpenAI |
| Released | Mar 3, 2026 | Feb 5, 2026 |
| Type | Multimodal | Multimodal |
| Weights | Closed | Closed |
| Status | Retired | Deprecated |
| License | Proprietary | Proprietary |
| Size and context | ||
| Architecture | - | - |
| Parameters | - | - |
| Active parameters | - | - |
| Context window | 128K | 400K |
| Max output | 16.4K | 128K |
| Knowledge cutoff | Aug 2025 | Aug 2025 |
| Price per 1M tokens (USD) | ||
| Input, current | - | $1.75 |
| Output, current | - | $14.00 |
| Input, at launch | $1.75 | $1.75 |
| Output, at launch | $14.00 | $14.00 |