GPT 5.6 Terra
GPT 5.6 Terra is the balanced model of the GPT-5.6 family, built for everyday production work with performance comparable to the previous generation at a lower price, stronger agentic coding, biology, and cybersecurity results, and a context window of 1.1M tokens. Your use is subject to OpenAI's Terms & Privacy Policies.
ReasoningWeb SearchFile InputTool UseVision (Image)Implicit CachingHas Fast ModeWebsockets
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.6-terra', prompt: 'Why is the sky blue?'})Copy link to headingMore models by OpenAI
| Model |
|---|
| 1.1M | 1.6s | 229tps | $1/M$0.20/M Fast $0.40/M+1 more | $6/M$1.20/M Fast $2.40/M+1 more | Read: $0.1/M$0.02/M+1 more Write: $1.25/M$0.25/M+1 more | $10/K + input costs | +4 |    | 07/09/2026 | ||||
| 1.1M | 3.6s | 49tps | $5/M$2.50/M Fast $5/M+1 more | $30/M$15/M Fast $30/M+1 more | Read: $0.5/M$0.25/M+1 more Write: $6.25/M$3.13/M+1 more | $10/K + input costs | +4 | | 07/09/2026 | ||||
| 1.1M | 0.8s | 70tps | $2.50/MFast $5/M+1 more | $15/MFast $30/M+1 more | Read: $0.25/M+1 more Write: — | $10/K + input costs | +4 | | 03/05/2026 | ||||
| 400K | 4.3s | 132tps | $0.05/M | $0.40/M | Read:$0.01/M Write:— | $14/K + input costs | +3 | | 08/07/2025 | ||||
| 400K | 3.1s | 128tps | $0.25/MFast $0.45/M | $2/MFast $3.60/M | Read:$0.03/M Write:— | $14/K + input costs | +3 | | 08/07/2025 | ||||
| 131K | 0.2s | 482tps | $0.35/M | $0.75/M | Read:$0.25/M Write:— | — |   +5 | 08/05/2025 |