GPT Calculator vs Promptmetheus (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: GPT Calculator does not list a price
Free plan
Tie
Both have one
Higher rating
Promptmetheus
2.8 against 3.4
Same job?
Yes
Both are AI Infrastructure & Agent Tooling tools

Side by side

Compared on	GPT Calculator	Promptmetheus
Our rating	2.8	3.4Better
Starts at	Free	Free
Free plan	Yes	Yes
Category	AI Infrastructure & Agent Tooling	AI Infrastructure & Agent Tooling
Plans	Free	Free
Key features	Token count and estimated cost for a pasted GPT prompt Covers GPT-4, GPT-3.5 and the older GPT-3 Ada and Davinci models Runs the calculation in the browser, with no account needed Free to use States its own archived status rather than pretending to be current	Access to 150+ LLMs across 15+ providers in one workspace Automatic Evaluators score outputs against defined criteria Built-in cost calculation across models and providers Systematic prompt composition and testing IDE Free Playground tier for OpenAI models
Pros	Free with no sign-up Honest about being an archived, unofficial tool Points users to OpenAI's own pricing and tokenizer for accuracy	Genuinely broad model access (150+) rather than 2-3 providers Cost tracking before production commitment avoids budget surprises 7-day free trial on paid tiers to evaluate fit
Cons	No current OpenAI models are covered The hosted API is dead; only the browser page still works Built and maintained by one person, with no company behind it	Free Playground tier is limited to OpenAI models only Team tier per-seat pricing ($19/month/user) adds up for larger teams Best suited to technical users already comfortable with prompt engineering concepts
Company	Adnan Qureshi	Promptmetheus

Prices come from each vendor's pricing page, last checked 20260922. Check the vendor before you buy.

FAQ

Questions people ask

Is GPT Calculator better than Promptmetheus?

In our reviews GPT Calculator scores 2.8 and Promptmetheus scores 3.4. The better pick depends on the job. GPT Calculator: Free, one-developer tool that counts tokens and estimates the cost of a GPT prompt, now labelled an archived, client-side tool. Promptmetheus: A prompt engineering IDE with access to 150+ LLMs across 15+ providers - build, test, and evaluate prompts systematically instead of trial-and-error in a chat window.

Which is cheaper, GPT Calculator or Promptmetheus?

GPT Calculator: free. Promptmetheus: free.

Do GPT Calculator and Promptmetheus have free plans?

Yes, both have a free plan.

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