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OpenAI: GPT-6 Astra Pro API Pricing

OpenAI: GPT-6 Astra Pro is an API model from openai. It costs $10 per 1M input tokens and $50 per 1M output tokens, with cached input at $1. Its context window is 1,050,000 tokens with up to 128,000 output tokens. A workload of 10M input + 2M output tokens costs about $200 per month.
Input
$10
per 1M tokens
Output
$50
per 1M tokens
Cached input
$1
per 1M tokens
Context window
1.05M
1,050,000 tokens
Blended (80/20)
$18
per 1M tokens

GPT-6 Astra Pro is the same underlying model as [GPT-6 Astra](https://openrouter.ai/openai/gpt-6-astra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...

How much does OpenAI: GPT-6 Astra Pro cost for a real workload?

At 10M input + 2M output tokens per month, OpenAI: GPT-6 Astra Pro costs about $200 ($100 input + $100 output). Try your own volumes in the cost calculator.

What are cheaper alternatives to OpenAI: GPT-6 Astra Pro?

Compare OpenAI: GPT-6 Astra Pro with other models

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Frequently asked questions

How much does OpenAI: GPT-6 Astra Pro cost?

OpenAI: GPT-6 Astra Pro costs $10 per 1M input tokens and $50 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $200.

What is the context window of OpenAI: GPT-6 Astra Pro?

OpenAI: GPT-6 Astra Pro has a context window of 1,050,000 tokens and can return up to 128,000 output tokens per response.

What are cheaper alternatives to OpenAI: GPT-6 Astra Pro?

Cheaper models include Anthropic: Claude Opus 4.1 (batch) ($7.5 in / $37.5 out), OpenAI: GPT-4 Turbo ($10 in / $30 out), Sakana: Fugu Ultra v2 ($5 in / $30 out). See the full list on this page.

Is OpenAI: GPT-6 Astra Pro free to use?

No. OpenAI: GPT-6 Astra Pro is a paid model at $10 input / $50 output per 1M tokens. 20 free models are listed on the free models page.

Provider: openai · Model ID: openai/gpt-6-astra-pro · Modality: text+image+file->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices