OpenAI · MultimodalReleased 2026-09-04

gpt-6-astra-fast

openai/gpt-6-astra-fast id

GPT-6 Astra is OpenAI's most capable model for complex reasoning, coding, computer use, research, and document creation.

Tool useReasoningChatWeb searchStructured output

Type

Use gpt-6-astra-fast

# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'openai/gpt-6-astra-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

$22.00/M

INPUT · PER M

$110.00/M

OUTPUT · PER M

PRICING

List prices, every modality.

Rate	Per million tokens · USD
Input	$22.00/M
Output	$110.00/M
Cache read	$2.20/M
Cache write	$27.50/M

Honest list pricesHow we calculate prices

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gpt-6-luna-fastGPT-6 Luna is OpenAI's efficient reasoning model for focused, high-volume tasks. It accepts text and images, generates text, and supports a 1,050,000-token context window with up to 128,000 output tokens. Configurable reasoning effort, structured outputs, prompt caching, and Responses API tools support cost-sensitive applications, coding tasks, and automated workflows.TOOLSREASONINGJSONWEB
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gpt-6-solGPT-6 Sol is OpenAI's reasoning model for complex coding and agentic workflows. It accepts text and images, generates text, and supports a 1,050,000-token context window with up to 128,000 output tokens. Configurable reasoning effort, structured outputs, prompt caching, and Responses API tools make it suited to software development and multi-step automation.TOOLSREASONINGJSONWEB
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$11.00/M
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gpt-6-sol-fastGPT-6 Sol is OpenAI's reasoning model for complex coding and agentic workflows. It accepts text and images, generates text, and supports a 1,050,000-token context window with up to 128,000 output tokens. Configurable reasoning effort, structured outputs, prompt caching, and Responses API tools make it suited to software development and multi-step automation.TOOLSREASONINGJSONWEB
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gpt-6-astraGPT-6 Astra is OpenAI's most capable model for complex reasoning, coding, computer use, research, and document creation.TOOLSREASONINGWEBJSON
Input
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gpt-5.6-sol-fastGPT-5.6 Sol is the flagship of OpenAI's GPT-5.6 series, its most capable model for long-horizon agentic work across coding, biology, and cybersecurity.REASONINGTOOLSWEBJSON
Input
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Output
$44.00/M
Context
1.1M

FAQ · GPT-6-ASTRA-FAST

Frequently asked

01 / 04

How do I call gpt-6-astra-fast from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘openai/gpt-6-astra-fast’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does gpt-6-astra-fast cost?

Input: $22.00/M per million tokens. Output: $110.00/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-astra-fast?

gpt-6-astra-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-astra-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.

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