LoomLens AI™ — Prompt Cost Estimator#

What It Does#

Estimates the exact cost in USD of running any prompt across 19+ AI models — before you spend a single token. Shows input tokens, output tokens, cached tokens, and cost per model for low/mid/high complexity bands.

When to Use#

• Before running a large prompt across multiple agents
• When optimizing for cost in production pipelines
• When comparing models for a new use case
• After prompt changes to check budget impact

Syntax#

In chat, type:

text

/loomlens Estimate the cost of this prompt across GPT-4o and Claude Sonnet 4

Free Tier#

3 estimates/day free with any Signalloom API key (no card required).

Get your free key: https://signalloomai.com/signup

Paid: $0.10/estimate (100 LoomTokens). LoomLens Pro: $15/mo for 1,000 estimates.

Output#

Returns cost breakdown per model:

• Input / Output / Cached token estimates
• Low / Mid / High cost bands
• Cheapest model recommendation
• Savings vs most expensive option

Examples#

text

/loomlens "You are an expert radiologist. Analyze this chest X-ray..." --agents 3 --runtime 5
/loomlens "Summarize this 10-page document" --models openai/gpt-4o anthropic/claude-haiku-4
/loomlens "Code review: find all security issues in this diff" --complexity high