How much does OpenAI: GPT-5.6 Sol Pro cost per 1M tokens?

OpenAI: GPT-5.6 Sol Pro costs $4.00 per 1M input tokens and $20.00 per 1M output tokens on the standard tier. Cached input is $0.400 per 1M.

What is OpenAI: GPT-5.6 Sol Pro's context window?

OpenAI: GPT-5.6 Sol Pro accepts up to 1,050,000 tokens in a single request, and can return up to 128,000 output tokens.

Is there a cheaper OpenRouter model than OpenAI: GPT-5.6 Sol Pro?

Yes. Free Models Router is free per 1M input tokens versus $4.00 for OpenAI: GPT-5.6 Sol Pro, with a 200,000 token context window.

Where does this OpenAI: GPT-5.6 Sol Pro price come from?

From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

OpenAI: GPT-5.6 Sol Pro pricing

GPT-5.6 Sol Pro is the same underlying model as GPT-5.6 Sol, served with reasoning.mode set to pro for higher-quality responses on complex tasks. OpenAI: GPT-5.6 Sol Pro from OpenRouter costs $4.00 per 1M input tokens and $20.00 per 1M output tokens. Cached input is $0.400 per 1M. Context window 1,050,000 tokens.

API id openai/gpt-5.6-sol-pro · OpenRouter · source · updated 2026-11-10 · general-purpose

$4.00

Input / 1M tokens

$20.00

Output / 1M tokens

$0.400

Cached input / 1M

1.1M

Context window

OpenAI: GPT-5.6 Sol Pro specifications

Provider: OpenRouter
API id: openai/gpt-5.6-sol-pro
Model type: general-purpose
Context window: 1.1M tokens
Max output: 128K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-11-10

What OpenAI: GPT-5.6 Sol Pro costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.01
Document summary	50,000	2,000	$0.24
1M tokens in, 200K out	1,000,000	200,000	$8.00

Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.

OpenAI: GPT-5.6 Sol Pro price history

Recorded	Input /1M	Output /1M
2026-10-15	$4.00	$20.00
2026-10-05	$2.00	$10.00
2026-09-29	$4.00	$20.00
2026-08-27	$2.00	$10.00

Common questions

How much does OpenAI: GPT-5.6 Sol Pro cost per 1M tokens?: OpenAI: GPT-5.6 Sol Pro costs $4.00 per 1M input tokens and $20.00 per 1M output tokens on the standard tier. Cached input is $0.400 per 1M.
What is OpenAI: GPT-5.6 Sol Pro's context window?: OpenAI: GPT-5.6 Sol Pro accepts up to 1,050,000 tokens in a single request, and can return up to 128,000 output tokens.
Is there a cheaper OpenRouter model than OpenAI: GPT-5.6 Sol Pro?: Yes. Free Models Router is free per 1M input tokens versus $4.00 for OpenAI: GPT-5.6 Sol Pro, with a 200,000 token context window.
Where does this OpenAI: GPT-5.6 Sol Pro price come from?: From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

Head-to-head comparisons

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