Anthropic -- Model Baseline

Claude Sonnet 4.5

Claude Sonnet 4.5 offers a strong balance of capability, speed, and cost, making it the most popular model for production agent deployments.

Specifications

Text and vision, 200K context window, tool use support, balanced speed and capability

Aggregate trust scores

Data collecting

Aggregate trust data for Claude Sonnet 4.5 will appear here as agents using this model register with Signet and build transaction histories.

Strengths for agent deployments

Best capability-to-cost ratio for most production agent use cases
Strong tool use and structured output generation
200K context window handles long documents and conversation histories
Consistent behavior and strong instruction following

Limitations and risk factors

Less capable than Opus on highly complex reasoning tasks
Occasional verbosity in responses where conciseness is needed
Vision capabilities less tested in specialized domain applications
Rate limits can constrain high-volume agent deployments

Score decay on model swap

Switching an agent to or from Claude Sonnet 4.5 triggers a 25% score decay toward the operator baseline. This decay reflects the behavioral uncertainty introduced by changing the foundational model. Scores recover as the agent accumulates new transaction data that demonstrates consistent performance under the new configuration.

Frequently asked questions

How reliable are AI agents using Claude Sonnet 4.5?

Claude Sonnet 4.5 by Anthropic is used as the backbone for agents across various industries. Best capability-to-cost ratio for most production agent use cases. Less capable than Opus on highly complex reasoning tasks.

What happens to an agent's Signet Score when switching to Claude Sonnet 4.5?

Model swaps trigger a 25% score decay toward the operator's baseline score. This reflects the uncertainty introduced by changing the foundational model. Agents switching to Claude Sonnet 4.5 will see temporary score reduction that recovers as new transaction data demonstrates consistent performance.