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LLMS • CURATED • UPDATED JUL 9, 2026

GPT-5.6 Terra

OpenAI's balanced GPT-5.6 model for intelligence and cost

GPT-5.6 Terra is the mid-tier model in OpenAI's GPT-5.6 family, released alongside Sol and Luna in July 2026. It shares the same 1.05M-token context window and 128K max output as Sol but is optimized for workloads that balance capability, latency, and cost. It supports text and image input, function calling, web search, file search, computer use, image generation, and code interpreter, making it a practical default for general-purpose reasoning and agentic workflows.

QUICK FACTS

Pricing Freemium
Platforms web, api, mobile
API No
Open Source No
Modalities LLMs, IDEs & Coding Tools
Best For Best for Balanced Cost and Capability
Date Added 2026-07-09

WHY WE PICKED IT

Terra is the sensible default for most GPT-5.6 work: it delivers the lion's share of Sol's capability at roughly 40% of the cost and is the default model for ChatGPT Free and Go users.

STRENGTHS

LIMITATIONS

GETTING STARTED

Access GPT-5.6 Terra via ChatGPT (it is the default for Free and Go users) or through the OpenAI API using the gpt-5.6-terra snapshot. Standard pricing is $2/M input and $12/M output tokens, with cache hits at $0.20/M. It is the best starting point for GPT-5.6 API work; move up to Sol only when tasks genuinely require frontier-level reasoning.

QUICK TIPS

1 Use Terra as the default GPT-5.6 model for most tasks
2 Switch to Sol only for the hardest reasoning or coding tasks
3 Cache repeated prompts to take advantage of low cache-hit pricing
4 Take advantage of Terra's full tool support for agent workflows
5 Monitor cost against Sol to confirm Terra is sufficient for your workload

OFFICIAL LINKS

Website↗ API Docs↗

SIMILAR TOOLS

Google Antigravity 2.0 Claude Fable 5 GPT-6 Astra NotebookLM Claude Opus 5

USE CASE EXAMPLES

Drafting and Editing Documents

Generate, revise, and proofread long-form documents at lower cost than Sol.

STEPS:
  1. Upload or paste the document into ChatGPT or the API
  2. Ask for an outline, draft, or revision
  3. Iterate on tone and structure
  4. Fact-check and finalize
  5. Export the result to your preferred format

General-Purpose Coding Assistant

Get code explanations, refactoring suggestions, and function-level generation.

STEPS:
  1. Paste the code or describe the task
  2. Ask for an explanation, refactor, or test cases
  3. Review the generated code carefully
  4. Run tests and iterate
  5. Move complex architectural work to Sol if needed

PRICING

Freemium Free tier available

Free tier includes limited features. Paid plans unlock full access, higher usage limits, and commercial usage rights.

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EXPLORE ALTERNATIVES

View GPT-5.6 Terra Alternatives (2026) →

Compare GPT-5.6 Terra with 5+ similar llms AI tools.

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FREQUENTLY ASKED QUESTIONS

Q

Is GPT-5.6 Terra free?

A

GPT-5.6 Terra offers a free tier with optional paid upgrades.

Q

Does GPT-5.6 Terra have an API?

A

No, GPT-5.6 Terra does not appear to offer a public API.

Q

What is GPT-5.6 Terra best for?

A

GPT-5.6 Terra is best for Balanced Cost and Capability. GPT-5. Terra is the sensible default for most GPT-5.6 work: it delivers the lion's share of Sol's capability at roughly 40% of the cost and is the default model for ChatGPT Free and Go users.

Q

What platforms does GPT-5.6 Terra support?

A

GPT-5.6 Terra supports web, api, mobile.

Q

Is GPT-5.6 Terra open source?

A

No, GPT-5.6 Terra is not open source.

Q

How do I get started with GPT-5.6 Terra?

A

Access GPT-5.6 Terra via ChatGPT (it is the default for Free and Go users) or through the OpenAI API using the gpt-5.6-terra snapshot. Standard pricing is $2/M input and $12/M output tokens, with cache hits at $0.20/M. It is the best starting point for GPT-5.6 API work; move up to Sol only when task...

Q

How do I use GPT-5.6 Terra?

A

GPT-5.6 Terra is a large language model for text generation, analysis, and conversation. Access through the web interface. Enter prompts or questions to get responses. It excels at 1.05m-token context window with a 128k output ceiling.

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