GPT-5.3 Chat
As of Oct 4, 2026, the cheapest GPT-5.3 Chat API price is $1.75 per 1M input tokens (302.AI) and $14 per 1M output tokens (302.AI). GPT-5.3 Chat is offered by 4 providers in the gpt family, reasoning enabled.
API pricing by provider
Metered per-token prices. Cheapest input and output are highlighted; † marks a context-tier surcharge. How prices are ranked.
 302.AI | Cheapest$1.75 | Cheapest$14 | — | — | 128k |
| Abacus | $1.75 | $14 | — | — | 400k |
| Merge Gateway | $1.75 | $14 | $0.175 | — | 128k |
| ZenMux | $1.75 | $14 | — | — | 128k |
GPT-5.3 Chat pricing FAQ
What is the cheapest GPT-5.3 Chat API?
As of Oct 4, 2026, 302.AI has the lowest GPT-5.3 Chat output price at $14 per 1M tokens, and 302.AI has the lowest input price at $1.75 per 1M tokens. Prices are metered per-token rates in USD; free tiers and subscription plans are excluded.
How many providers offer GPT-5.3 Chat?
4 providers list GPT-5.3 Chat on Sovyron; 4 of them sell it at a metered per-token price.
Is GPT-5.3 Chat free?
No provider in the Sovyron catalog lists a free tier for GPT-5.3 Chat.
What is the context window of GPT-5.3 Chat?
GPT-5.3 Chat supports a 400k-token context window and up to 128k output tokens.
Token cost calculator
What a month costs at one provider's published rates. Enter the tokens you expect to send and receive; cached tokens use the cached-input price where the provider lists one, and count as ordinary input where it does not.
Estimated
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