GPT-5.3 Chat
GPT-5.3 Chat is OpenAI's language model with a 128K context window and up to 64K output tokens, available from 4 providers, starting at $1.75 / 1M input and $14.00 / 1M output. A GPT-5.3 snapshot optimized for conversational use in ChatGPT, supporting vision, file input, tool use, and reasoning with implicit caching.
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities7/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling✓
Structured Outputs✓
Native JSON Schema✓
Web Search✓
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
| Provider | Standard | |||
|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Web Search $ / query | |
 Azure AI Foundry | $1.75 | $14.00 | $0.175 | N/A |
OpenAI | $1.75 | $14.00 | $0.175 | N/A |
 OpenRouter | $1.75 | $14.00 | $0.175 | $0.010 |
 Vercel AI Gateway | $1.75 | $14.00 | $0.175 | N/A |
Cost Calculator
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| GPT-5.5 | 1.1M | $5.00 | $30.00 | Available | |
| GPT-5.4 Mini | 1.1M | $0.750 | $4.50 | Available | |
| GPT-5.4 Nano | 1.1M | $0.200 | $1.25 | Available | |
| GPT-5.4 | 1.1M | $2.50 | $15.00 | Available | |
| GPT-5.3 Chat | 128K | $1.75 | $14.00 | Current | |
| GPT-5.3 Codex | 400K | $1.75 | $14.00 | Available | |
| GPT-5.2 Codex | 400K | $1.75 | $14.00 | Available | |
| GPT-5.2 | 410K | $1.75 | $14.00 | Available | |
| GPT-5.1 | 410K | $1.25 | $10.00 | Available | |
| GPT-5.1 Codex | 400K | $1.25 | $10.00 | Available | |
| GPT-5.1 Codex Mini | 400K | $0.250 | $2.00 | Available |