1. Measure token input
Count prompt tokens and estimate the input charge for a representative request.
Count tokensAI stack cost and selection
Compare AI models, APIs, and coding tools by real cost.
Estimate monthly spend for model APIs, coding assistants, and common agent workloads using checked prices, token volume, requests, caching, team size, and plan limits.
Popular decisions
Choose the right AI stack
Start with a verified price, a workload estimate, or a comparison that matches the decision in front of you. Browse coding tools.
API pricing
OpenAI API pricing
Check input, cached input, and output prices per 1M and 1K tokens.
Check OpenAI API pricing API pricingClaude API pricing
Check input, cache write, cache hit, and output prices per 1M and 1K tokens.
Check Claude API pricing Interactive comparisonCompare AI models
Change token volume and requests to compare monthly API cost.
Open model comparison Coding-tool pricingWindsurf pricing
Check plans, team base fees, developer seats, and cost examples.
Check Windsurf pricing Token toolCount prompt tokens
Count tokens before estimating model input cost.
Open token counter Cost methodologyEstimate monthly LLM cost
Work from requests, token volume, output length, and caching.
Read the cost guideCost workflow
From workload to stack decision
Measure the work, price the usage, and compare the options that can change the total before you commit.
2. Model monthly spend
Add output tokens, request volume, and caching to estimate a fuller API budget.
Calculate monthly cost3. Compare the options
Compare models, providers, and coding-tool subscriptions before choosing a stack.
Compare costsTracked data
Models and tools in the StackLens index
See the most-used entries below, or browse every tracked model.
OpenAI APILLM APIAPI tokensFrom GPT-4o mini: $0.15 input · $0.6 output / 1Mproduction AI features, multimodal apps, developer tooling, broad ecosystem supportAnthropic APILLM APIAPI tokensFrom Claude Haiku 4.5: $1 input · $5 output / 1Mlong document workflows, agentic coding, analysis-heavy tasks, safety-sensitive product teamsCursorAI coding toolSubscriptionFree · Pro $20/mo · Teams $40/user/moindividual developers, small product teams, repo-aware coding help, fast codebase editsOpenAI GPT-4o miniLLM modelAPI tokens$0.15 input · $0.6 output / 1Mlow cost, fast responses, good default for routingOpenAI GPT-4oLLM modelAPI tokens$2.5 input · $10 output / 1Mmultimodal capability, balanced quality, broad ecosystemOpenAI GPT-5.6 SolLLM modelAPI tokens$5 input · $30 output / 1Mhigher-capability OpenAI option, standard short and long context prices tracked, fits OpenAI routing plans