OpenAI: GPT-5.6 Terra
openai/gpt-5.6-terra
ReasoningToolsJSONVision
Intelligence
—
Design Elo
—
Speed
—
tokens/sec
Latency
—
first token
Input price
$2.50
255th cheapest
Context
1.1M
128K max out
How it compares
Cheaper than16%
of all ranked models
Overview
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...
Providers & pricing (3)
| Provider | In $/M | Out $/M | Context | Uptime |
|---|---|---|---|---|
| OpenAI | $2.50 | $15.00 | 1.1M | 100% |
| OpenAI | $1.25 | $7.50 | 1.1M | 100% |
| OpenAI | $5.00 | $30.00 | 1.1M | 100% |
Specifications
Context window1.1M
Max output128K
Knowledge cutoffFeb 2026
Input modalitiesfile, image, text
Output modalitiestext
Prompt caching—
Cache read price$0.250/M
ModeratedYes
GPT-5.6 Terra FAQ
How much does GPT-5.6 Terra cost?
GPT-5.6 Terra costs $2.50 per million input tokens and $15.00 per million output tokens via OpenRouter, making it 255th cheapest of 303 paid models.
What is GPT-5.6 Terra's context window?
GPT-5.6 Terra supports a 1.1M-token context window and can output up to 128K tokens. It accepts file, image, text input.