OpenAI · MultimodalReleased 2026-10-26

gpt-6.1-terra-fast

openai/gpt-6.1-terra-fast id

GPT-6.1 Terra is OpenAI’s model for visual reasoning, precise computer use, and natural writing. It accepts text and images and generates text, with configurable reasoning effort, structured outputs, tool calling through the Responses API, and implicit and explicit prompt caching.

Tool useReasoningStructured outputChatWeb search
Type
Use gpt-6.1-terra-fast
# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$
$ const { text } = await generateText({
$ model: 'openai/gpt-6.1-terra-fast',
$ baseURL: 'https://synapse.garden/api/v1',
$ apiKey: process.env.MG_KEY,
$ prompt: 'Why is the sky blue?',
$ })
1.1M
CONTEXT WINDOW
128K
MAX OUTPUT
$2.20/M
INPUT · PER M
$11.00/M
OUTPUT · PER M
PRICING

List prices, every modality.

RatePer million tokens · USD
Input$2.20/M
Output$11.00/M
Cache read$0.110/M
Cache write$2.75/M
Honest list pricesHow we calculate prices
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FAQ · GPT-6.1-TERRA-FAST

Frequently asked

01 / 04

How do I call gpt-6.1-terra-fast from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘openai/gpt-6.1-terra-fast’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does gpt-6.1-terra-fast cost?

Input: $2.20/M per million tokens. Output: $11.00/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for gpt-6.1-terra-fast?

gpt-6.1-terra-fast supports a context window of 1.1M tokens, with a maximum output of 128K tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try gpt-6.1-terra-fast in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.