GPT-5.6 Sol

Going away soon

by OpenAI

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 and long-horizon problem solving.

Best for: GPT-5.6 flagship for CLI-heavy coding and long-horizon problem solving.

262K context

Text
Reasoning
Tool use

Try it in the playground

Pricing

USD per 1M tokens.

Window	Input	Cached input	Output
asap	$2.00	$0.20	$10.00

What one request costs

Prompt24Ktokens

Cached prefix17Ktokens

Reply2Ktokens

$0.0328

per request to GPT-5.6 Sol

Prompt: 44%
Cached: 10.3%
Reply: 45.8%

The same request, across other models