Price Claude cache writes by 5m/1h token split in calculate mode

[Copilot]

calculate mode was undercounting Claude cache creation cost by pricing all cache_creation_input_tokens at the single LiteLLM cache-write rate (effectively 5m behavior). Claude JSONL records already provide a 5m/1h split, so 1h writes were not being charged at Anthropic’s 2× input rate.

• Cost pipeline: add split-aware cache creation pricing

  • Introduced split-aware cost inputs in rust/crates/ccusage/src/cost.rs.
  • Added a dedicated path that prices:
    • ephemeral_5m_input_tokens at existing cache_create rate
    • ephemeral_1h_input_tokens at input * 2.0 (and input_above_200k * 2.0 when present)
    • any remainder at legacy cache_create rate (fallback compatibility).

• Claude loaders: parse and pass cache split from JSONL

  • rust/crates/ccusage/src/adapter/claude/mod.rs now extracts usage.cache_creation.{ephemeral_5m_input_tokens,ephemeral_1h_input_tokens} from usage lines (including agent-progress envelope shape).
  • rust/crates/ccusage/src/adapter/claude/daily.rs now uses the same extraction path and forwards split data into cost calculation.

• Public wiring and focused coverage

  • Exported the new split-aware cost helpers via rust/crates/ccusage/src/main.rs.
  • Added focused tests for:
    • 1h split pricing behavior vs legacy fallback
    • cache split parsing for both direct usage and agent-progress JSONL line shapes.

// Split-aware cache creation pricing
tiered_cost(ephemeral_5m, pricing.cache_create, pricing.cache_create_above_200k)
+ tiered_cost(
    ephemeral_1h,
    pricing.input * 2.0,
    pricing.input_above_200k.map(|v| v * 2.0),
)
+ tiered_cost(fallback_tokens, pricing.cache_create, pricing.cache_create_above_200k)

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	ccusage-guide	7ba3468	Commit Preview URL Branch Preview URL	May 29 2026, 11:31 PM