GPT-5.6 Terra
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on September 30, 2026· 217 models
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.
- Reasoning estimated
- Speed estimated
- Input
- Output
- Context
- 1.1 M tokens
- Max output
- 128 K
- Input, $ per 1M tokens
- $2.00
- Output, $ per 1M tokens
- $12.00
- Cache read, $ per 1M
- $0.200
- Batch (input / output)
- $1.00 / $6.00
- Tool calling
- Yes
- Released
- 07/09/2026
- Knowledge cutoff
- 2026-02-16
- API id
- openai/gpt-5.6-terra
Summary from the data
GPT-5.6 Terra is a OpenAI model available by API since 07/09/2026. It costs $2.00 per million input tokens and $12.00 per million output tokens, accepts 1.1 M tokens of context and generates up to 128 K tokens per response. Input: PDF / file, image, text; output: text. It has a reasoning mode. It supports tool calling. With 10,000 requests a month of 1,500 input and 400 output tokens it would cost about $78.00 a month.
Compare GPT-5.6 Terra with…
- GPT-5.6 Terra vs GPT-5.6 Terra Pro
- GPT-5.6 Terra vs GPT-5.6 Luna
- GPT-5.6 Terra vs GPT-5.6 Luna Pro
- GPT-5.6 Terra vs GPT-5.6 Sol
- GPT-5.6 Terra vs Claude Sonnet 5.5
- GPT-5.6 Terra vs DeepSeek V4.1 Flash
- GPT-5.6 Terra vs Gemini 3.8 Flash
- GPT-5.6 Terra vs Mistral Medium 3.5
- GPT-5.6 Terra vs Kimi K3
- GPT-5.6 Terra vs Qwen3.8 Max Prime
What would your product cost?
Estimate the monthly cost with your app's real volume. List prices, no cache or batch discounts.
The 6 cheapest for this scenario (chat, last 12 months)
- 1Lyria 3 Pro Preview Google$0.00
- 2Lyria 3 Clip Preview Google$0.00
- 3Qwen3.7 Flash Qwen$0.97
- 4DeepSeek V4 Flash 0731 DeepSeek$1.55
- 5Ministral 3 3B 2512 Mistral$1.90
- 6Qwen3.5-Flash Qwen$2.02
Frequently asked questions
How much does GPT-5.6 Terra cost per million tokens?
GPT-5.6 Terra costs $2.00 per million input tokens and $12.00 per million output tokens (USD, list price). Cache read: $0.200. Batch tier: $1.00 / $6.00.
What context window does GPT-5.6 Terra have?
GPT-5.6 Terra accepts 1.1 M tokens of context per request and generates up to 128 K tokens per response.
Does GPT-5.6 Terra accept images, audio or files?
Input: PDF / file, image, text. Output: text.
Does GPT-5.6 Terra have a reasoning mode and tool calling?
It has a reasoning mode. It supports tool calling.
When was GPT-5.6 Terra released and what is its knowledge cutoff?
GPT-5.6 Terra has been available by API since 07/09/2026. Knowledge cutoff: 2026-02-16.
What would an app built on GPT-5.6 Terra cost?
With 10,000 requests a month of 1,500 input and 400 output tokens, GPT-5.6 Terra would cost about $78.00 a month at list price, without cache or batch discounts.
What is the API id of GPT-5.6 Terra?
The id is openai/gpt-5.6-terra. It is the name passed in the model parameter of the API (or on OpenRouter).
Where do the prices come from and how often are they updated?
From the public catalogs of OpenRouter, models.dev and LiteLLM, which publish each provider's list prices. They sync once a day and the last update date is shown above the comparison.
What does price per million tokens mean?
It is what the provider charges per million tokens you send (input) or the model generates (output). A token is roughly 4 characters. Output almost always costs more than input.
Sources: OpenRouter, models.dev and LiteLLM. Prices in USD per million tokens, list price, no volume discounts. Prompt tokens are an estimate; each provider's tokenizer may differ.