All OpenAI models

GPT-5.6 Terra

OpenAI · released 1 month ago

GPT-5.6 Terra is a OpenAI model with a 1.05M token context window — about 1,500 pages of text. It reads Files, Images, and Text and replies in Text. It can show its reasoning before it answers.

$1.15

input / 1M tokens

$6.90

output / 1M tokens

1.05M

context — about 1,500 pages

1.1¢

a client proposal

Pricing

Input
$1.15 per million tokens
Output
$6.90 per million tokens
Cached input
$0.115 per million tokens
Cache writes
$1.44 per million tokens
Web search
0.57¢ per search
Long-context rate (over 272K)
$2.30 in · $10.35 out, per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
OpenAI
Released
1 month ago (2026-07-09)
Context window
1.05M tokens — about 1,500 pages
Max output
128K tokens per reply
Input
Files, Images, and Text
Output
Text
Reasoning
Shows its thinking before answering
Knowledge cutoff
2026-02-16

Cost vs Token Amount

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80% Input20% Output
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GPT-5.6 Terra

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What a task costs

2K tokens in · 500 tokens out.

GPT-5.6 Terra

OpenAI

0.57¢

for this task

40% input · 60% output

Full pricing →

Your $5 welcome credit covers about 869 of these.

Compare GPT-5.6 Terra

Closest in price on a typical task:

GPT-5.6 Terra vs GPT-5.6 Terra Pro →GPT-5.6 Terra vs Muse Spark 1.1 →GPT-5.6 Terra vs Qwen3.6 Max Preview →GPT-5.6 Terra vs GLM 5 Turbo →Any other combination →

Questions, answered

How much does GPT-5.6 Terra cost on Alyph?

GPT-5.6 Terra costs $1.15 per million input tokens and $6.90 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about 1.1¢. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is GPT-5.6 Terra's context window?

1.05M tokens — about 1,500 pages. Replies can be up to 128K tokens long. Prompts longer than 272K tokens are billed at the long-context rate.

Can GPT-5.6 Terra read images and files?

GPT-5.6 Terra reads Files, Images, and Text. Drop a file onto the canvas and it becomes part of the context — the only limit is the context window.

Does GPT-5.6 Terra show its reasoning?

Yes. GPT-5.6 Terra can expose its thinking before the final answer, so you can watch how it got there.

Test GPT-5.6 Terra against GPT-5.6 Terra Pro

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

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