GPT-5.3 Chat
Vercel AI Gateway
GPT-5.3 Chat by Vercel AI Gateway costs $1.75 per 1M input tokens and $14.00 per 1M output tokens, with a 128K-token context window.
Pricing
Input (per 1M tokens)
$1.75
Output (per 1M tokens)
$14.00
Cached input (per 1M)
$0.18
Specifications
- Provider
- Vercel AI Gateway
- Context window
- 128K tokens
- Parameters
- —
- Released
- Mar 2026
- Open weights
- No
- Frontier model
- No
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FAQ
How much does GPT-5.3 Chat cost?
GPT-5.3 Chat is priced at $1.75 per 1M input tokens and $14.00 per 1M output tokens. Output tokens cost more than input.
What is GPT-5.3 Chat's context window?
GPT-5.3 Chat supports a context window of 128K tokens — the maximum prompt plus response length it can handle in a single request.
Is GPT-5.3 Chat open weight?
No — GPT-5.3 Chat is a closed/proprietary model accessed via API.
Data as of 2026-06-28. Source: models.dev (open). Pricing is per 1M tokens (USD); confirm with the provider before production use.