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fix(ccusage): add flat pricing for Opus 4.6 / Sonnet 4.6 to fix inflated costs #898

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fix(ccusage): add flat pricing for Opus 4.6 / Sonnet 4.6 to fix inflated costs #898

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39 changes: 38 additions & 1 deletion apps/ccusage/src/_macro.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -13,10 +13,47 @@ function isClaudeModel(modelName: string, _pricing: LiteLLMModelPricing): boolea
);
}

/**
* Anthropic API pricing for 1M-context models that use flat (non-tiered) pricing.
*
* Claude Opus 4.6 and Sonnet 4.6 include the full 1M context window at standard
* pricing — there is no premium for requests exceeding 200k input tokens.
* See: https://docs.anthropic.com/en/docs/about-claude/pricing#long-context-pricing
*
* LiteLLM's dataset only contains Bedrock entries (e.g. `anthropic.claude-opus-4-6-v1`)
* which carry `*_above_200k_tokens` fields for Bedrock-specific tiered pricing.
* When ccusage falls back to substring matching, it picks up those Bedrock entries
* and incorrectly applies tiered pricing to direct Anthropic API usage, inflating costs.
*
* By injecting entries keyed by the exact Anthropic API model names, direct lookup
* succeeds before the substring fallback ever fires.
*/
const ANTHROPIC_API_FLAT_PRICING: Record<string, LiteLLMModelPricing> = {
'claude-opus-4-6': {
input_cost_per_token: 5e-6, // $5 / MTok
output_cost_per_token: 2.5e-5, // $25 / MTok
cache_creation_input_token_cost: 6.25e-6, // $6.25 / MTok (1.25x input)
cache_read_input_token_cost: 5e-7, // $0.50 / MTok (0.1x input)
max_input_tokens: 1_000_000,
max_output_tokens: 128_000,
},
'claude-sonnet-4-6': {
input_cost_per_token: 3e-6, // $3 / MTok
output_cost_per_token: 1.5e-5, // $15 / MTok
cache_creation_input_token_cost: 3.75e-6, // $3.75 / MTok (1.25x input)
cache_read_input_token_cost: 3e-7, // $0.30 / MTok (0.1x input)
max_input_tokens: 1_000_000,
max_output_tokens: 64_000,
},
};

export async function prefetchClaudePricing(): Promise<Record<string, LiteLLMModelPricing>> {
try {
const dataset = await fetchLiteLLMPricingDataset();
return filterPricingDataset(dataset, isClaudeModel);
const filtered = filterPricingDataset(dataset, isClaudeModel);
// Inject flat-pricing entries for Anthropic API model names so that
// direct lookup matches before falling back to Bedrock substring matches.
return { ...filtered, ...ANTHROPIC_API_FLAT_PRICING };
} catch (error) {
console.warn('Failed to prefetch Claude pricing data, proceeding with empty cache.', error);
return createPricingDataset();
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