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OpenAI: GPT-5.6 Terra

OpenAIModerated
openai/gpt-5.6-terra

About this model

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...

Make a request

OpenAI-compatible: set the base URL and your Promptix API key, keep your existing SDK.

curl https://promptix.tn/api/v1/chat/completions \  -H "Authorization: Bearer $PROMPTIX_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "model": "openai/gpt-5.6-terra",    "messages": [      {"role": "user", "content": "Hello! What can you do?"}    ]  }'

Pricing

In TND per 1M tokens. VAT and the platform fee are added at top-up.

Input tokens

7.742 TND

per 1M tokens

Output tokens

46.452 TND

per 1M tokens

1,000 requests with 1K input and 500 output tokens cost about 30.968 TND.

Specifications

Provider
OpenAI
Context window
1,050,000 tokens
Input modality
Text
Added
Jul 9, 2026
Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputs