Rate table

Rates are compiled into the binary, which is why cca needs no network access. They are stored as absolute USD per million tokens for all five billed classes of every model, mirroring the published price sheet — so each number is checkable by eye, and per-model exceptions need no special arithmetic.

Embedded rates

Verified on 2026-09-19 against https://platform.claude.com/docs/en/about-claude/pricing.

Model	Input	Output	Cache 5m	Cache 1h	Cache read	Notes
claude-fable-5-1	10	50	12.5	20	0.25	—
claude-mythos-5-1	10	50	12.5	20	0.25	inferred id
claude-fable-5	10	50	12.5	20	1	—
claude-mythos-5	10	50	12.5	20	1	inferred id
claude-opus-5	5	25	6.25	10	0.5	fast mode
claude-opus-4-8	5	25	6.25	10	0.5	fast mode
claude-opus-4-7	5	25	6.25	10	0.5	—
claude-opus-4-6	5	25	6.25	10	0.5	—
claude-opus-4-5	5	25	6.25	10	0.5	—
claude-opus-4-1	15	75	18.75	30	1.5	retired
claude-opus-4	15	75	18.75	30	1.5	retired
claude-sonnet-5	2	10	2.5	4	0.2	—
claude-sonnet-4-6	3	15	3.75	6	0.3	—
claude-sonnet-4-5	3	15	3.75	6	0.3	—
claude-sonnet-4	3	15	3.75	6	0.3	retired
claude-haiku-4-5	1	5	1.25	2	0.1	—
claude-haiku-3-5	0.8	4	1	1.6	0.08	retired

All figures are USD per million tokens.

Two pairs that look alike and are not

claude-fable-5 and claude-fable-5-1 are identical in every column except cache reads, where they differ four-fold. claude-sonnet-4-6 costs 50% more than claude-sonnet-5. Model resolution uses longest-prefix matching precisely so these never collapse into one another.

Modifiers

Modifier	Multiplier	When
inference_geo_us	1.1x	The record pins inference to the US
batch	0.5x	The record ran on the batch tier

Fast mode does not multiply — it swaps the base rate pair, with cache columns recomputed from the fast base.

Fast mode	Models
Supported	claude-opus-5, claude-opus-4-8
Accepted, runs and bills at standard speed	claude-opus-4-6
Rejected by the API	claude-opus-4-7

Server tools

Tool	Price
Web search	$0.01 per request
Web fetch	Free beyond the tokens it pulls in

Failed web searches are not billed, but the transcript does not mark them, so that charge is an upper bound.

Replacing the table

Rates change. Put a pricing.json in your config directory, or pass --pricing PATH:

cca --pricing ./my-rates.json

The override replaces the embedded table entirely rather than merging into it, so a price change is a whole-file edit and never a partial one. Start by copying internal/pricing/pricing.json.

Minimal example

{
  "schema_version": 1,
  "currency": "USD",
  "unit": "per_million_tokens",
  "models": [
    {
      "id": "claude-opus-5",
      "name": "Claude Opus 5",
      "rates": {
        "input": 5.00,
        "output": 25.00,
        "cache_write_5m": 6.25,
        "cache_write_1h": 10.00,
        "cache_read": 0.50
      }
    }
  ],
  "non_models": ["<synthetic>"]
}

non_models lists placeholder strings that appear where a model id belongs. They are dropped before unknown-model detection, so they never produce a spurious warning.

Validation

A table is rejected on load if the schema version is unsupported, no models are listed, a model has no id, two models share an id, or any rate is negative.

Unknown models

cca never guesses a rate. A model with no entry has its tokens counted and its dollars excluded, and is named in a footnote telling you how to price it.