gpt-5.6-terra API pricing

Checked 12 Sept 2026 LLMs
$ per 1M input $2.00
$ per 1M output $12.00

Blended at 3:1 input to output: $4.50 per million tokens.

OpenAI charges $2.00 per million input tokens and $12.00 per million output tokens. 4 of the models nearest it in price are cheaper on a blended basis.

$2.00
$/1M input
$12.00
$/1M output
$0.200
$/1M cached in
922,000
Context window
$336.00
1k req/day, monthly

Against the models nearest in price

Blended at a 3:1 input to output ratio.

Calculator →
gpt-5.6-terra against comparable models — checked 12 Sept 2026
Source
gpt-5.6-terra This model OpenAI $2.00 $12.00 922,000 $4.50

Last checked . Methodology

Questions

How much does gpt-5.6-terra cost per million tokens?

$2.00 per million input tokens and $12.00 per million output tokens, with cached input at $0.200. At a 3:1 input to output mix that blends to $4.50. Checked 12 Sept 2026.

What would gpt-5.6-terra cost for a real workload?

A thousand requests a day at 2,000 input and 600 output tokens each comes to $336.00 a month.

What is the context window for gpt-5.6-terra?

922,000 tokens of input, with up to 128,000 tokens of output.

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