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GPT-5.6

gpt-sol1.1M context128k max outputreleased Jul 9, 2026ReasoningTool calling

As of Oct 4, 2026, the cheapest GPT-5.6 API price is $1.5 per 1M input tokens (Xpersona) and $12 per 1M output tokens (Xpersona). GPT-5.6 is offered by 2 providers in the gpt-sol family, reasoning enabled. OpenAI's own rate is $20 per 1M output tokens.

Cheapest input
$1.5
Xpersona
Cheapest output
$12
Xpersona
Official (OpenAI)
$20
output per 1M tokens
Providers
2
offering this model
Spread
1.7×
max / min output
Free offers
0
free-tier offers

API pricing by provider

Metered per-token prices. Cheapest input and output are highlighted; † marks a context-tier surcharge. How prices are ranked.

GPT-5.6 API prices by provider in USD per 1M tokens, updated Oct 4, 2026
XpersonaCheapest$1.5Cheapest$12$0.15—372k
OpenAI†$4$20$0.4$51.1M

GPT-5.6 pricing FAQ

What is the cheapest GPT-5.6 API?

As of Oct 4, 2026, Xpersona has the lowest GPT-5.6 output price at $12 per 1M tokens, and Xpersona has the lowest input price at $1.5 per 1M tokens. Prices are metered per-token rates in USD; free tiers and subscription plans are excluded.

How much does GPT-5.6 cost on OpenAI?

OpenAI charges $4 per 1M input tokens and $20 per 1M output tokens for GPT-5.6.

How many providers offer GPT-5.6?

2 providers list GPT-5.6 on Sovyron; 2 of them sell it at a metered per-token price.

Is GPT-5.6 free?

No provider in the Sovyron catalog lists a free tier for GPT-5.6.

What is the context window of GPT-5.6?

GPT-5.6 supports a 1.1M-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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