GPT-5.6 Terra

Jul 2026
GPT-5.6 Terra
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$0.14per task?
$2 / $12per 1M in / outcache $0.20
129 tok/sfirst token in 1.5 s?
1.05Mcontext

Rankingat low effort?

Alternatives?

Benchmarks

all categories
Chat & Knowledge
MLCR-AA8.9#43
HealthBench Professional length-adjustedlab57.7
HealthBench length-adjustedlab57
HealthBench Hard length-adjustedlab32.7
HealthBench Consensus length-adjustedlab95.1
Coding
SciCode49.9#51
SWE-bench Pro (edition unstated)lab63.4
MultiLangBenchlab37.9
Agents & Tool Use
Writing & Language
Vision & Documents

Watch out 1

Prompts with >272K input tokens›

Above 272K input tokens, input costs 2× and output 1.5× for the full request. Source ↗

FAQ

How much does GPT-5.6 Terra cost?›

$2 per 1M input tokens and $12 per 1M output tokens; cached input $0.20 per 1M. A typical benchmark task costs about $0.14 at low effort.

Is GPT-5.6 Terra free to use?›

There is no free API; the cheapest paid price is $2 per 1M input tokens.

How good is GPT-5.6 Terra, and what is it best at?›

#84 of 334 in Chat & Knowledge, #51 of 132 in Coding, #48 of 133 in Agents & Tool Use, #46 of 195 in Writing & Language, #41 of 124 in Vision & Documents.

Is GPT-5.6 Terra better than Qwen3.8 Max (0902)?›

On Humanity's Last Exam, GPT-5.6 Terra scores 42.9 vs 43.1 — about the same. It is 97% cheaper per task.

How can I use GPT-5.6 Terra?›

Through the API of Amazon Bedrock, Azure, OpenAI.

What is the context window of GPT-5.6 Terra?›

1.05M tokens, with up to 128K output tokens.

When was GPT-5.6 Terra released? Is there a newer version?›

Released 2026-07-09. It is the current version in its line.

Is GPT-5.6 Terra open source?›

No, GPT-5.6 Terra is a closed model available through an API. The closest open-weights option here is MiMo v2.6 Pro.

Can GPT-5.6 Terra read images?›

It accepts text and images, PDF files as input.

What is GPT-5.6 Terra?›

GPT-5.6 Terra is a closed language model from OpenAI, released Jul 2026, the successor to GPT-3.5 Turbo.

What are the best alternatives to GPT-5.6 Terra?›

MiMo v2.6 Pro (cheaper), GPT-6 Luna (better).