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feat(stats): add claude-fable-5 to PRICE_TABLE

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This commit is contained in:
Kjell Tore Guttormsen 2026-07-02 17:15:36 +02:00
commit 0799d6e914
2 changed files with 18 additions and 1 deletions
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10
lib/stats/token-usage.mjs
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@ -27,6 +27,7 @@ import { join, dirname } from 'node:path';
// Per-Mtok USD prices, resolved 2026-06-26 via the claude-api skill reference:
// base input/output from the model table; cache rates from the prompt-caching
// doc multipliers (cache_read 0.1x, write_5m 1.25x, write_1h 2.0x of input).
// claude-fable-5 resolved 2026-07-02 from the official platform pricing docs.
export const PRICE_TABLE = Object.freeze({
'claude-opus-4-8': Object.freeze({
input: 5.0,
@ -35,10 +36,17 @@ export const PRICE_TABLE = Object.freeze({
cache_write_5m: 6.25,
cache_write_1h: 10.0,
}),
'claude-fable-5': Object.freeze({
input: 10.0,
output: 50.0,
cache_read: 1.0,
cache_write_5m: 12.5,
cache_write_1h: 20.0,
}),
});
// Date the PRICE_TABLE values were resolved/verified. Bump when prices change.
export const PRICE_TABLE_VERSION = '2026-06-26';
export const PRICE_TABLE_VERSION = '2026-07-02';
function num(v) {
return typeof v === 'number' && Number.isFinite(v) ? v : 0;

9
tests/lib/token-usage.test.mjs
View file

@ -75,6 +75,15 @@ test('deriveCost — hand-computed value for a known model (cache-aware)', () =>
assert.equal(is_estimate, false);
});
test('deriveCost — hand-computed value for claude-fable-5 (v5.9 fable tier)', () => {
const totals = { tokens_input: 3000, tokens_output: 500, tokens_cache_creation: 1000, tokens_cache_read: 6000 };
const { cost_usd, is_estimate } = deriveCost(totals, 'claude-fable-5');
// (3000×10 + 500×50 + 1000×12.5 + 6000×1) / 1e6
// = (30000 + 25000 + 12500 + 6000) / 1e6 = 73500 / 1e6 = 0.0735
assert.equal(cost_usd, 0.0735);
assert.equal(is_estimate, false);
});
test('deriveCost — refuse-to-estimate for an unknown model', () => {
const totals = { tokens_input: 3000, tokens_output: 500, tokens_cache_creation: 1000, tokens_cache_read: 6000 };
const out = deriveCost(totals, 'claude-unknown-9');