GPT-5.6 Terra
GPT-5.6 Terra is a text and image-input model by OpenAI, available through the AgentSky API as openai/gpt-5.6-terra at $1.40 per million input tokens and $8.40 per million output tokens, with a 1.1M context window.
The middle GPT-5.6 tier, trading some capability for a lower price.
Run GPT-5.6 Terra with an agent
Each guide pairs this model with a compatible agent and opens the composer with both selected.
- Hermes + GPT-5.6 Terra
- Claude Code + GPT-5.6 Terra
- Codex + GPT-5.6 Terra
- OpenClaw + GPT-5.6 Terra
- pi + GPT-5.6 Terra
- DeepSeek Harness + GPT-5.6 Terra
- Kimi Code + GPT-5.6 Terra
- OpenCode + GPT-5.6 Terra
- Cline + GPT-5.6 Terra
- DeepAgents + GPT-5.6 Terra
- goose + GPT-5.6 Terra
- Grok Build + GPT-5.6 Terra
- Kilo + GPT-5.6 Terra
- MiniMax Code + GPT-5.6 Terra
- Qwen Code + GPT-5.6 Terra
Pricing
USD per million tokens, using your plan when signed in.
| Meter | Per 1M tokens |
|---|---|
| Input | |
| Output | |
| Cache read | |
| Cache write |
Use it
Point your client at the gateway and pass this model id. Nothing else changes.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://gateway.agentsky.dev/v1",
apiKey: process.env.AGENTSKY_API_KEY, // ast_…
});
const completion = await client.chat.completions.create({
model: "openai/gpt-5.6-terra",
messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(completion.usage.cost); // USD, in the response