Compare LLM API Costs Across All Major Providers
Calculate monthly costs for OpenAI, Anthropic Claude, Google Gemini and more.
About this tool
LLM API pricing varies wildly between providers and models. GPT-4 Turbo costs 40× more than GPT-4o Mini for the same task. Claude 3 Haiku is often the cheapest option for high-volume applications, while Gemini 1.5 Flash offers the lowest price for long-context workloads. This calculator helps you compare real monthly costs before choosing a provider.
Quick Fact
Processing 1 million tokens with GPT-4 Turbo costs $10 in input + $30 in output = $40 total. The same task with GPT-4o Mini costs $0.15 + $0.60 = $0.75 — 53× cheaper.
Common Use Cases
→ Startup Cost Planning
Estimate monthly API spend before building a product, so you can price your service profitably.
→ Model Migration
Calculate how much you'd save by switching from GPT-4 Turbo to Claude 3.5 Sonnet for your use case.
→ Batch Processing Jobs
Estimate costs for one-time jobs like processing a database of 100,000 documents with an LLM.
→ Choosing the Right Tier
Decide whether a premium model's quality improvement justifies the 10–50× cost increase over a budget model.
Frequently Asked Questions
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Which LLM API is the cheapest in 2025?
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For low-cost high-volume use, Gemini 1.5 Flash ($0.075/1M input tokens) and GPT-4o Mini ($0.15/1M input tokens) are among the cheapest commercial options. Open-source models like LLaMA 3 can be self-hosted for zero API cost, with only infrastructure expenses.
How much does GPT-4 cost per month?
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Monthly GPT-4o costs depend heavily on usage. At 1,000 requests/month with 1,000 input and 500 output tokens each, GPT-4o costs approximately $3.75/month. At 100,000 requests with the same token counts, that becomes $375/month. Use our API cost calculator for your specific usage pattern.
How do I reduce LLM API costs?
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Key strategies to cut LLM API costs: (1) Use smaller models like GPT-4o Mini or Claude Haiku where quality allows. (2) Cache repeated prompts. (3) Shorten system prompts. (4) Use batch APIs for 50% discount on non-urgent tasks. (5) Self-host open-source models for very high volume.
Is Claude cheaper than GPT-4?
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Claude 3.5 Sonnet ($3/1M input, $15/1M output) and GPT-4o ($2.50/1M input, $10/1M output) are similarly priced. Claude 3 Haiku ($0.25/1M input) is significantly cheaper than GPT-4o Mini ($0.15/1M input). The best choice depends on your specific use case and required output quality.
What is batch API pricing?
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OpenAI, Anthropic, and Google offer batch processing APIs at roughly 50% off standard prices, in exchange for longer turnaround times (up to 24 hours). This is ideal for non-real-time workloads like data analysis, content generation, or document processing.
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