Your Claude Code cost, priced at the rates that were live then
API rates move. Valuing a token you spent six months ago at today's rate gives you the wrong number. Goei builds its 12-month re-priced history on the open AI Price Index, so every past month reads at the rate that was in effect then, not today.
Why point-in-time pricing matters
The rate on the day
Each month of usage is valued at the input, output, and cache rates that the provider published on the days it ran. A cut last spring does not silently rewrite last winter.
Dated and first-party
Every rate is transcribed from the provider's own pricing page, carries the date it was confirmed, and links its source. No scraped guesses.
Reproducible
Goei pins a dated release of the dataset (v2026.07.09-43f905c), so the dollar number on a historical month is stable and auditable, not a moving target.
Today's Claude Code model rates
The models Claude Code runs on, at current list API rates, USD per 1M tokens. Goei values your local usage at these rates for the current month and at the historical rates for older months.
Deeper per-model history and every other model live on the per-model pricing pages.
What changed
A sample of real, dated rate changes from the index, biggest move first. Each one is exactly why an old month has to be valued at its own rate. A down move is a price cut, so a month before it costs more than the same usage after.
| Effective | Model | Rate | Was | Became | Change | Source |
|---|---|---|---|---|---|---|
| 2026-06-24 | mistral-small-4 Mistral | output | $0.30 | $0.60 | +100% | page |
| 2025-06-10 | o3 OpenAI | input | $10 | $2 | -80% | page |
| 2025-06-10 | o3 OpenAI | output | $40 | $8 | -80% | page |
| 2026-06-24 | mistral-small-4 Mistral | input | $0.10 | $0.15 | +50% | page |
| 2024-08-06 | gpt-4o OpenAI | input | $5 | $2.50 | -50% | page |
| 2024-08-06 | gpt-4o OpenAI | output | $15 | $10 | -33% | page |
| 2024-12-03 | 3-5-haiku Anthropic | input | $1 | $0.80 | -20% | page |
| 2024-12-03 | 3-5-haiku Anthropic | output | $5 | $4 | -20% | page |
The complete, newest-first log of every dated change is the pricing changelog.
The data behind it
The re-pricing engine reads the AI Price Index, an open dataset of 101 models across 11 providers, every price first-party-sourced, dated, and human-verified, licensed CC BY 4.0. Prefer to explore it visually? The interactive AI Price Index tool charts the full history with a point-in-time read-out.
See your own 12-month re-priced Claude Code history, per project, per developer, per model. View the demo