AI Subscription vs API Cost Calculator
This compares raw token math only — it doesn't model subscription message caps, bundled features (file tools, voice, image generation, deep research), or regional pricing differences, and API pricing is a point-in-time snapshot (dated 2026-10-03; Anthropic and Google rows re-checked then, OpenAI and Amazon rows last confirmed 2026-09-03 — see the related AI Token Cost Calculator), not a live feed. Actual usage is rarely perfectly steady, so treat the break-even point as a rough guide, not an exact cutoff.
Free calculator comparing a flat AI subscription ($20/mo ChatGPT Plus, Claude Pro, or Gemini AI Pro) against pay-as-you-go API cost for your actual usage — pick any of 12 models, see your break-even point.
How it works
- Pick a subscription plan (or enter your own monthly price) and an API model to compare against
- Enter your typical prompts per day and average input/output tokens per prompt
- See your estimated monthly API cost vs the subscription price, plus the break-even usage level where they cost the same
Frequently asked questions
Is the cheaper option always the better choice?
Not necessarily — this compares token math only. It doesn't account for subscription-only features (bundled voice, image generation, deep research, file tools, higher message caps) or the flexibility of paying only for what you use via API. Price is one factor, not the whole decision.
Why can I pick any of 12 API models instead of just one?
Different models have very different per-token prices — a cheaper model can push your break-even point far higher than a flagship one. Comparing against a fixed single model (as some other calculators do) hides that difference.
How current is this pricing?
It's a point-in-time snapshot from the same dataset as this site's AI Token Cost Calculator, not a live feed — this tool runs entirely in your browser. Check provider pricing pages directly before committing to real production spend.
What counts as a "prompt" in this calculator?
One request-response exchange — you send input tokens (your prompt plus any context) and receive output tokens (the model's reply). Multi-turn conversations use several prompts, so estimate your typical exchanges per day, not just messages you personally type.
Related tools
From the blog
Sora 2's API Shuts Down Tomorrow — Here's What AI Video Actually Costs Per Second
OpenAI confirmed Sora 2 API access ends September 24, 2026. Before that deadline (or after, if you're picking a replacement), here's what Sora 2, Veo 3.1, Kling 3.0, and Runway Gen-4.5 actually charge per second — sourced from each provider's own pricing page.
2026-09-23
ChatGPT Plus vs API: When Does Paying Per Token Actually Save You Money?
$20/month feels simple, but it isn't always cheaper than the API — and most break-even calculators lock you into comparing against one fixed model. Here's how to find your real break-even point with any model you actually use.
2026-09-22Update history
- 2026-10-03 API model list now includes Claude Sonnet 5.5, Claude Opus 5.5, Gemini 3.8 Flash and Gemini 3.5 Flash (12 models total) using re-checked Anthropic and Google prices; OpenAI/Amazon rows unchanged (dated 2026-09-03).
- 2026-09-22 Launched: AI Subscription vs API Cost calculator comparing ChatGPT Plus/Claude Pro/Gemini AI Pro (or a custom price) against any of 8 API models from the existing token pricing dataset, with a usage-based break-even point. Entirely client-side.