AI Observatory / Model Radar
OpenAI / openai/gpt-5.3-chat
OpenAI: GPT-5.3 Chat
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
128,000
Context
16,384
Max output
$1.75 / 1M
Prompt price
2026-03-03
Created
01 / Snapshot
Pricing, context, modalities, and parameters.
Model Radar detail pages stay neutral and operator-readable: core metadata first, then workflow fit.
| Provider | OpenAI | Input modalities | text, image, file |
|---|---|---|---|
| Output modalities | text | Prompt price | $1.75 / 1M |
| Completion price | $14.00 / 1M | Request price | N/A |
| Context length | 128,000 | Max completion tokens | 16,384 |
| Supported parameters | max_completion_tokens, max_tokens, response_format, seed, structured_outputs, tool_choice, tools | ||
Best for
openai/gpt-5.3-chat
OpenAI: GPT-5.3 Chat
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
Cross-modal work
Coding workflows
new
vision
tool-capable
03 / Colophon
Routes and exits.
Each model page stays simple: overview, compare, related models, then back to the public hub.