toksum.dev

Predict your real LLM bill before shipping.

Compare GPT-4o, Claude, Gemini, and more — with batch discounts and prompt caching built in. Free. No sign-up required.

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GPT-4o vs Claude 3.5 Sonnet

Headline frontier-tier comparison

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GPT-4o Mini vs Claude 3.5 Haiku

Budget tier for high-volume workloads

Tool

AI Token Counter

OpenAI tiktoken + Anthropic — in your browser

Roadmap

✅ Day 0 — Astro dev server + Cloudflare Pages deploy
✅ Day 1–3 — Legal pages, Web Analytics, sitemap, OG images (G1 gate)
✅ Week 1 — Pricing data + 3 calculator pages + 23 unit tests (G2 gate)
⬜ Week 2 — Pro subscription (Polar.sh) + 5 more calculator pages + Show HN prep
⬜ Week 3 — Show HN launch

Built in public · Follow the journey on Twitter/X