LLM Cost Calculator
Project monthly LLM spend from your real prompts and traffic. Token counts stay local; prices come from a versioned catalog so you can compare DeepSeek, OpenAI, Claude, Gemini, and vLLM without burning API credits.
- 1Fill inputs
- 2Run
- 3Copy / export
Inputs
Required fields on the left
Uses tiktoken + published list prices. No live LLM call per estimate — ideal for DeepSeek API cost and OpenAI token cost comparisons.
Results
Appears after you run
Compare LLM monthly spend
Enter prompts and requests/sec, then estimate costs across DeepSeek, OpenAI, Anthropic, Gemini, and vLLM.
From inputs to a decision
Project monthly LLM spend from your real prompts and traffic. Token counts stay local; prices come from a versioned catalog so you can compare DeepSeek, OpenAI, Claude, Gemini, and vLLM without burning API credits.
- 01
Paste system and user prompts (or leave system empty).
- 02
Set requests per second and days per month.
- 03
Select models to compare, then run the estimate.
- 04
Copy or export the monthly $ table for planning.
Tips for better results
- Match RPS to peak load, not idle averages, when sizing budgets.
- Open related compare pages for keyword-specific DeepSeek vs GPT briefs.
- Use the same prompt pack and RPS when comparing models.
Frequently asked questions
- Does the LLM cost calculator call the models?
- No. It tokenizes locally and applies published per-million prices, so estimates do not consume live AI credits.
- Can I compare DeepSeek API cost to GPT-4o?
- Yes. Select both models with the same prompts and traffic to see side-by-side monthly cost.
- How accurate are the prices?
- Prices follow OmniKit’s versioned catalog. Update the catalog when vendors change list rates; negotiated contracts may differ.
Related tools
Keep measuring in the same cluster — or jump to the next decision.
- Prompt Token DiffCompare two prompts on tokens and monthly $ across models.Open →
- RAG Cost EstimatorProject monthly embedding + retrieval + generation spend for a RAG stack.Open →
- Model Router RecommenderMap task types to primary/alternative models with blended $/mo estimates.Open →
- Rate-Limit PlannerMap RPS and tokens to RPM/TPM headroom before you throttle.Open →
Why teams use this calculator
Use this OpenAI token cost calculator pattern for any prompt pack: paste prompts, set requests/sec, and compare DeepSeek API cost against GPT-4o, Claude, Gemini, and self-hosted vLLM before you lock a vendor.