Models & pricing

Claude Opus 5

Model ID

claude-opus-5

Context window

300k · up to 1M

Provider

Anthropic

Speed

Medium

Cost

High

Intelligence

Frontier

Claude Opus 5 is Anthropic's highest-capability model available in Ask ASUME. It is well suited to demanding questions that benefit from deep reasoning, substantial context, and careful analysis of maintained company understanding.

Selecting Claude Opus 5 changes how an Ask is answered. It does not change how ASUME builds or maintains the underlying company understanding.

Strengths

Deep reasoning

Well suited to difficult questions that require sustained reasoning across several interacting considerations.

Careful interpretation

Strong when an Ask depends on interpreting ambiguous information, competing explanations, or nuanced company context.

Long-horizon analysis

Useful for substantial analytical work where the model needs to maintain the objective across many pieces of context.

Large context

Supports Asks involving substantial maintained company understanding, with context available up to 1M tokens.

Limitations

High cost

Opus costs more than Claude Sonnet 5 and most other directly selectable models, so it may be unnecessary for everyday questions.

More capability than many Asks need

Questions involving clear company context and moderate reasoning may be handled more efficiently by Claude Sonnet 5, Corollary, or Auto.

Not the most economical default

Repeated use for straightforward work can consume substantially more model usage than lower-cost options without providing a meaningful benefit for every Ask.

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 Claude Opus 5

Choose Claude Opus 5 when an Ask benefits from Anthropic's strongest reasoning, substantial context, or careful evaluation of several competing factors.

Complex company reasoning

Use Opus when a question involves several interacting needs, capabilities, constraints, priorities, or opportunities.

Competing explanations

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

Large company context

Use Opus when an Ask requires a substantial amount of maintained company understanding to be considered together.

Quality over cost

Use Opus when additional reasoning capability and analytical depth matter more than minimizing token cost.

Pricing

Claude Opus 5 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
Claude Opus 5	€5.40	€6.75	€0.54	€26.90

The rates above are billed by ASUME and may differ from Anthropic's own API pricing. Choosing Claude Opus 5 affects only the model usage associated with the Ask.