LLM Token Counter
Estimate prompt tokens and what they cost per call.
Estimated tokens
0
Characters
0
Words
0
Monthly cost estimate
GPT-5 class $5.00 GPT-5 mini class $1.00 Claude Sonnet class $7.50 Gemini Flash class $1.25
Cutting LLM Cost and Latency
Seven levers ranked by payoff, model-routing patterns, and a realistic 100% → 11% cost walkthrough.
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About this tool
Tokens are subword chunks — roughly four characters of English text. This counter estimates tokens from character and word statistics and projects the cost of sending the prompt to common models.
Why token counts matter
They drive both cost and context limits. Long system prompts multiply across every call in a conversation.
Reducing tokens
Trim boilerplate instructions, move static context into cached prefixes, and summarise history instead of resending it verbatim.
How to use LLM Token Counter
- 1
Open LLM Token Counter
Everything runs on this page — there is nothing to install and no account required to use the free features.
- 2
Add your input
Paste or enter your values in the panel above. The tool updates as you type, so you can iterate quickly.
- 3
Review the output
Check the result, copy it with one click, and adjust the options until it matches what your system expects.
- 4
Take it further
Use the ai & prompts tips below to make the result production-ready, then unlock the gated extras via the form above.
Best practices
- Measure before you optimise — capture real token counts and latency from production traffic.
- Version prompts like code, with a changelog and evaluation set behind each change.
- Default to the smallest model that passes your eval, and escalate selectively.
- Set hard spend limits at the provider before you scale traffic.
Why LLM Token Counter matters
LLM cost and quality are decided by details most teams never measure: token volume, prompt structure and model choice.
Without a number in front of you, budgets get set by hope and margins disappear as usage grows.
Related free & paid tools
| Tool name | Type | Key features | Link |
|---|---|---|---|
| OpenAI Tokenizer | Free | Official playground for GPT tokenisation | Visit |
| tiktoken | Free | The tokenizer library used in production code | Visit |
| Anthropic token counting API | Free | Exact Claude token counts before you send | Visit |
| HeliconeOffer | Freemium | Tracks real token usage per user and per feature | Visit |
Links marked Offer may be partner links. They cost you nothing extra and never affect which tools we recommend.