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by OpenAI

OpenAI: GPT-5.6 Sol.

multimodal closed 1.1M ctx
Cheapest input
$5.0/M
on OpenRouter
Cheapest output
$30.0/M
on OpenRouter
Hosted equiv.
~$10.8/hr
@ 100 tok/s on OpenRouter

GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks...

Hosted API only

No self-host path — closed weights.

OpenAI: GPT-5.6 Sol's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $5.0 $30.0 Launch ↗
FAQ

Frequently asked.

How do I run OpenAI: GPT-5.6 Sol?
OpenAI: GPT-5.6 Sol is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access OpenAI: GPT-5.6 Sol?
OpenAI: GPT-5.6 Sol is available via OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run OpenAI: GPT-5.6 Sol?
API pricing starts at $5.0/M input tokens and $30.0/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is OpenAI: GPT-5.6 Sol open-source or proprietary?
OpenAI: GPT-5.6 Sol is a proprietary model from OpenAI. Access is API-only — there are no public weights to download.