Free AI & LLM Tools — Token Counter, Cost Calculator & Model Comparison
Privacy-first, browser-only utilities for token math and API budgeting — no signup, no uploads. Pick a card below; each tool has its own structured data for search.
AI & LLM tools hub
Hub page listing every AI utility: token counter, cost calculators, RAG, caching, and programmatic model pages.
Open tool →AI Token Counter (GPT, Claude, Gemini)
Count tokens with o200k-style tokenization, then compare estimated LLM API cost across 30+ models. Pairs with the per-token cost calculator; all in-browser.
Open tool →API rate limit checker
TPM and RPM headroom against illustrative dev/production tiers.
Open tool →Audio API cost estimator
Duration-based illustrative cost bands for speech and TTS-style workloads.
Open tool →Context window visualizer
Prompt + history size vs model context with 70% / 90% markers.
Open tool →Embedding cost calculator
Float32 GB estimate plus embedding API math for ingest and monthly queries.
Open tool →Fine-tune vs prompt calculator
Break-even requests after a one-time fine-tune fee using your $/M assumptions.
Open tool →LLM API cost (per token count)
Enter input and output token counts; compare price across 30+ models. Deep-links from the token counter; cache- and reasoning-aware.
Open tool →LLM model comparison (2–4 models)
Side-by-side matrix: context, API $/M, capabilities; shareable ?models= links. Pairs with token counter and cost calculator.
Open tool →LLM pricing changelog
Editorial log of llm-pricing.json updates; pairs with /feed/pricing.xml.
Open tool →LLM scenario planner
Users × requests/day × tokens with ×2/×5 stress and 12‑month projection for one reference model.
Open tool →Prompt caching calculator
Compare per-request cost with and without prompt cache hits using published cached-input rates.
Open tool →RAG cost simulator
Documents × chunks × top‑K × daily queries × output tokens — illustrative monthly LLM spend.
Open tool →Vision token estimator
Rough planning estimate for image width/height → vision tokens.
Open tool →