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OpenAI: GPT-5.6 Terra

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openai/gpt-5.6-terra
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GPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, released on 2026-07-09 and positioned between the flagship Sol tier and the cost-efficient Luna tier. It suits everyday coding, reasoning, and agentic tasks where capability and cost have to be balanced, offering strong performance at a fraction of the flagship's cost. It supports reasoning, vision, tool use (function calling), prompt caching, and web search. Context window: 1M tokens, output: 128K. Available via OpenAI and Anthropic protocols through Ofox.

Context Window
1M
Max Output Tokens
128K
Released
2026-07-09
Capabilities
VisionFunction CallingReasoningPrompt CachingWeb Search
Available Providers
AzureOpenAI
Supported Protocols
openaianthropic

Providers

Azureprovider.type: "azure_foundry"
-20%
Input Tokens
$2/M
$2.5/M
Output Tokens
$12/M
$15/M
Cache Read
$0.2/M
$0.25/M
Cache Write
$2.5/M
$3.125/M
Output Image
$32/M
Web Search
$0.035/R
Protocols
openai/v1/chat/completions/v1/responses
anthropic
OpenAIprovider.type: "openai"
-20%
Input Tokens
$2/M
$2.5/M
Output Tokens
$12/M
$15/M
Cache Read
$0.2/M
$0.25/M
Cache Write
$2.5/M
$3.125/M
Output Image
$32/M
Web Search
$0.01/R
Protocols
openai/v1/chat/completions/v1/responses

Playground

Open in OfoxChat

Code Examples

from openai import OpenAI


client = OpenAI(
    base_url="https://api.ofox.run/v1",
    api_key="YOUR_OFOX_API_KEY",
)


response = client.chat.completions.create(
    model="openai/gpt-5.6-terra",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)


print(response.choices[0].message.content)

Uptime & Status

Further Reading on GPT-5.6 Terra

Related Models

More from OpenAI

OpenAI: GPT-6.1 Sol
$2/M/$10/M
OpenAI: GPT-6 Luna
$0.1/M/$0.5/M
OpenAI: GPT-6 Sol
$2/M/$10/M

Similar Models

Anthropic: Claude Sonnet 5.5
$2/M/$10/M
Anthropic: Claude Opus 5.5
$4/M/$20/M
xAI: Grok 4.7
$2/M/$6/M

Frequently Asked Questions

OpenAI: GPT-5.6 Terra on Ofox.ai costs $2.5/M per million input tokens and $15/M per million output tokens. Pay-as-you-go, no monthly fees.