GPT-5-Chat

Updated Oct 4, 2026

gpt-codex400k context128k max outputreleased Aug 7, 2025ReasoningTool calling

As of Oct 4, 2026, the cheapest GPT-5-Chat API price is $1.1 per 1M input tokens (Poe) and $9 per 1M output tokens (Poe). GPT-5-Chat is offered by 5 providers in the gpt-codex family, reasoning enabled.

Cheapest input

$1.1

Poe

Cheapest output

Poe

Official

—

output per 1M tokens

Providers

offering this model

Spread

1.1×

max / min output

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-Chat API prices by provider in USD per 1M tokens, updated Oct 4, 2026
Provider	1M input	1M output	1M cache read	1M cache write	Context
Poe	Cheapest$1.1	Cheapest$9	$0.11	—	128k
Jiekou.AI	$1.125	$9	—	—	400k
Helicone	$1.25	$10	$0.125	—	128k
Merge Gateway	$1.25	$10	$0.125	—	128k
OrcaRouter	$1.25	$10	$0.125	—	400k

GPT-5-Chat pricing FAQ

What is the cheapest GPT-5-Chat API?

As of Oct 4, 2026, Poe has the lowest GPT-5-Chat output price at $9 per 1M tokens, and Poe has the lowest input price at $1.1 per 1M tokens. Prices are metered per-token rates in USD; free tiers and subscription plans are excluded.

How many providers offer GPT-5-Chat?

5 providers list GPT-5-Chat on Sovyron; 5 of them sell it at a metered per-token price.

Is GPT-5-Chat free?

No provider in the Sovyron catalog lists a free tier for GPT-5-Chat.

What is the context window of GPT-5-Chat?

GPT-5-Chat supports a 400k-token context window and up to 128k output tokens.