Models & pricing

GPT-5.6 Sol

Model ID

gpt-5.6-sol

Context window

272k · up to 1M

Provider

OpenAI

Speed

Medium

Cost

Medium

Intelligence

Frontier

GPT-5.6 Sol is OpenAI's highest-capability model in the GPT-5.6 family available in Ask ASUME. It is well suited to questions that require deeper reasoning across company context, comparison of competing explanations, or analysis of substantial maintained understanding.

Selecting GPT-5.6 Sol changes how an Ask is answered. It does not change how ASUME builds or maintains the underlying company understanding.

Strengths

Strong reasoning

Well suited to questions where the answer requires several reasoning steps rather than retrieving an individual company fact.

Deep context synthesis

Performs well when an Ask depends on several parts of a company's maintained understanding being considered together.

Complex comparison

Useful for comparing companies, evaluating competing explanations, or reasoning across several constraints at once.

Long-context work

Can handle substantially larger contexts when an Ask requires more company information than fits within the standard context window.

Limitations

Higher cost

Sol costs more than GPT-5.6 Terra and GPT-5.6 Luna, so it may be unnecessary for straightforward company questions.

More capability than some Asks require

Questions that can be answered from limited, clear company context may be handled more efficiently by Corollary, a lower-cost model, or Auto.

Long context costs more

Requests exceeding the standard 272k context threshold use higher token rates.

Available context

Maintained understanding

Uses the structured company understanding ASUME has already constructed and maintains over time. Answers come from that context rather than rebuilding the company from the beginning for every question.

Evidence & assumptions

Can use relevant evidence, sources, and explicit assumptions associated with the maintained understanding when they are made available to the Ask.

Multi-company context

Can reason across the maintained understanding of multiple companies when a question involves comparison, relationships, or portfolio-level analysis.

Available capabilities

Can use the capabilities ASUME makes available for the Ask. Availability depends on the product, workspace permissions, and the capabilities supported at the time of the request.

When to use GPT-5.6 Sol

Choose GPT-5.6 Sol when an Ask benefits from stronger reasoning, substantial context, or careful evaluation of several competing factors.

Complex company reasoning

Use Sol when a question depends on several interacting needs, capabilities, constraints, priorities, or opportunities.

Competing explanations

Use Sol when evaluating different plausible explanations for a company's behaviour, position, or direction.

Multi-company analysis

Use Sol when comparing several companies across multiple factors and the relationships between those factors matter.

Large company context

Use Sol when an Ask requires a substantial amount of relevant maintained company understanding or when reasoning quality matters more than minimizing token cost.

Pricing

GPT-5.6 Sol is a directly selectable third-party model in Ask ASUME. Usage is billed at the ASUME rates below. All prices are per million tokens.

Name	Input	Cache Write	Cache Read	Output
GPT-5.6 Sol	€4.30	€5.40	€0.43	€21.50
GPT-5.6 Sol — Long Context (>272k)	€8.60	€10.80	€0.86	€32.25

When the input exceeds 272k tokens, long-context pricing applies. Input and cache rates are doubled, while output pricing is 1.5× the standard rate. The rates above are billed by ASUME and may differ from OpenAI's own API pricing.