GPT-5.6 Terra Description

GPT-5.6 Terra is OpenAI’s balanced GPT-5.6 model for users who need strong performance across everyday work, development tasks, enterprise workflows, and technical analysis. The model is part of the GPT-5.6 family alongside Sol and Luna, with Terra positioned as the middle tier for capable, cost-efficient use. Terra is described as having competitive performance to GPT-5.5 while being 2x cheaper, making it useful for teams that want advanced capability without always using the flagship model. It supports coding workflows, agentic tasks, cybersecurity-related defensive work, biology workflows, knowledge work, and tool-assisted automation. In benchmark previews, Terra appears alongside Sol and Luna in evaluations for coding, biology, ExploitBench, and ExploitGym. The model benefits from the GPT-5.6 safeguard stack, which includes model-level refusals for prohibited cyber assistance, real-time cyber and biology misuse classifiers, and account-level risk review. These safeguards are designed to preserve access to legitimate work such as code review, debugging, vulnerability research, patch development, security education, and defensive testing. GPT-5.6 Terra is planned for availability through the API, Codex, and broader OpenAI products after the limited preview period. GPT-5.6 Terra helps teams get a balanced model for high-quality AI work when they need strong reasoning and automation at a lower cost than Sol.

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Pricing

Pricing Starts At:
$2 per 1M tokens (input)
Pricing Information:
$2 input / $12 output per 1M tokens

Integrations

API:
Yes, GPT-5.6 Terra has an API
View Integrations

Reviews - 1 Verified Review

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Company Details

Company:
OpenAI
Year Founded:
2015
Headquarters:
United States
Website:
openai.com

Media

GPT-5.6 Terra Screenshot 1
GPT-5.6 Terra Screenshot 1 GPT-5.6 Terra Screenshot 2
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Product Details

Platforms
Web-Based
Types of Training
Training Docs
Customer Support
Online Support

GPT-5.6 Terra Features and Options

GPT-5.6 Terra User Reviews

Write a Review
  • Name: Anonymous (Verified)
    Job Title: Software Developer
    Length of product use: Less than 6 months
    Used How Often?: Daily
    Role: User
    Organization Size: 100 - 499
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Amazing model

    Date: Jul 09 2026

    Summary: Five stars from me. GPT-5.6 Terra looks like the model I would use most often because it balances capability, speed, and cost in a way that feels realistic for daily development. It is not the flashiest option, but it might be the most useful one for regular coding work.

    Positive: GPT-5.6 Terra seems like the practical daily driver of the lineup. As a developer, I like that it is positioned as a strong lower-cost model while still being useful for coding, professional work, and agentic tasks.

    This is probably the model I would use for the bulk of my normal development workflow: writing functions, reviewing code, generating tests, explaining errors, drafting docs, and helping with everyday automation. OpenAI’s developer community announcement describes Terra as a balanced model with GPT-5.5-competitive performance at lower cost, which makes it really interesting for teams trying to scale AI usage without blowing up their budget.

    Negative: Terra probably would not be my first pick for the hardest multi-hour agent runs or the most complex architecture decisions. For those, I would still want Sol. Terra feels more like the dependable workhorse than the absolute top-end reasoning model.

    The other downside is that developers will need to figure out where the line is between “Terra is enough” and “this needs Sol.” That routing decision matters a lot if you are building cost-efficient developer tools or coding agents.

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