GPT-6 Astra Pro

OpenAI· released 4 Sept 2026

openai/gpt-6-astra-pro

Input / 1M tokens: $10
Output / 1M tokens: $50

Context window1.1M tokens

Longest answer: 128K tokens

reads filereads imagereads texttool callingvisionreasoning

About

GPT-6 Astra Pro is OpenAI’s Pro-mode serving of GPT-6 Astra, with reasoning mode set to pro for higher-quality responses on complex tasks. It accepts file, image, and text inputs, supports tools, and returns text. Reasoning is supported, with a 1,050,000-token context window and a maximum output of 128,000 tokens. The model was released on 2026-09-04, and its listed model ID is openai/gpt-6-astra-pro. Pricing is USD 10 per 1M input tokens and USD 50 per 1M output tokens. The accompanying cost note warns that Pro mode spends far more, making the listed rates an important part of evaluating its role. Teams can weigh its long context and input types against the requirements of complex tasks where the Pro-mode setting is relevant.

Who it is for

It suits teams working on complex tasks that need the Pro reasoning setting, file or image inputs, or tool support. Teams should account for its listed input and output rates when assessing fit.

What is good

Pro reasoning mode
Accepts file, image, and text inputs
Tool support
1,050,000-token context window
Maximum output is 128,000 tokens

What to know first

Input costs USD 10 per 1M tokens
Output costs USD 50 per 1M tokens

Verdict

GPT-6 Astra Pro offers a long context, tools, and multiple input types alongside its Pro-mode setting for complex tasks. Its listed token prices make cost a central consideration.

Details

Lab: OpenAIopenrouter.ai · 3 Oct 2026
Context: 1,050Kopenrouter.ai · 3 Oct 2026
Input price: $10 / 1Mopenrouter.ai · 3 Oct 2026
Output price: $50 / 1Mopenrouter.ai · 3 Oct 2026
Max output: 128,000 tokensopenrouter.ai · 3 Oct 2026
Inputs: file, image, textopenrouter.ai · 3 Oct 2026
Open weights: Noopenrouter.ai · 3 Oct 2026

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Sources

openrouter.ai/openai/gpt-6-astra-pro· checked 3 Oct 2026