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fix(llm): correct mispriced model cost table #13

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Merged
gurdenbatra merged 1 commit into from
Jun 12, 2026
Merged

fix(llm): correct mispriced model cost table #13

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13 changes: 10 additions & 3 deletions src/lib/llm/__tests__/usage.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,10 +3,17 @@ import { estimateCostMicroCents } from '../usage';

describe('estimateCostMicroCents', () => {
it('estimates cost for Haiku model', () => {
// Haiku: $0.00025/1k input, $0.00125/1k output
// 1000 input + 1000 output = $0.00025 + $0.00125 = $0.0015 = 150 micro-cents
// Haiku 4.5: $1/MTok input, $5/MTok output → $0.001/1k in, $0.005/1k out
// 1000 input + 1000 output = $0.001 + $0.005 = $0.006 = 600 micro-cents
const cost = estimateCostMicroCents('claude-haiku-4-5-20251001', 1000, 1000);
expect(cost).toBe(150);
expect(cost).toBe(600);
});

it('estimates cost for Opus model', () => {
// Opus 4.8: $5/MTok input, $25/MTok output → $0.005/1k in, $0.025/1k out
// 1000 input + 1000 output = $0.005 + $0.025 = $0.03 = 3000 micro-cents
const cost = estimateCostMicroCents('claude-opus-4-8', 1000, 1000);
expect(cost).toBe(3000);
});

it('estimates cost for Sonnet model', () => {
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10 changes: 7 additions & 3 deletions src/lib/llm/usage.ts
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Original file line number Diff line number Diff line change
@@ -1,11 +1,15 @@
import type { LLMResponse } from './index';

// Cost in micro-cents per 1k tokens (1 micro-cent = $0.00001)
// Cost in micro-cents per 1k tokens (1 micro-cent = $0.00001).
// Per-1k micro-cents = (USD per 1M tokens) × 100. Rates per Anthropic pricing:
// Haiku 4.5 $1 / $5 Sonnet 4.6 $3 / $15 Opus 4.7/4.8 $5 / $25
const MODEL_COSTS: Record<string, { inputPer1k: number; outputPer1k: number }> = {
'claude-haiku-4-5-20251001': { inputPer1k: 25, outputPer1k: 125 },
'claude-haiku-4-5-20251001': { inputPer1k: 100, outputPer1k: 500 },
'claude-haiku-4-5': { inputPer1k: 100, outputPer1k: 500 },
'claude-sonnet-4-6': { inputPer1k: 300, outputPer1k: 1500 },
'claude-sonnet-4-20250514': { inputPer1k: 300, outputPer1k: 1500 },
'claude-opus-4-7': { inputPer1k: 1500, outputPer1k: 7500 },
'claude-opus-4-8': { inputPer1k: 500, outputPer1k: 2500 },
'claude-opus-4-7': { inputPer1k: 500, outputPer1k: 2500 },
};

export function estimateCostMicroCents(
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