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Sergey Galuza
878775f5b6
Extend `ModelPricing` with an optional `serviceTiers` map keyed by
Anthropic's `service_tier` request parameter. `getModelPricing(model,
{ serviceTier })` returns the matching tier rates when present and
transparently falls through to base rates otherwise — existing call
sites keep current behavior.
Registry entries added (per Anthropic Fast mode pricing docs):
- claude-opus-4-8 fast: $10/$50 input/output (2x premium)
- claude-opus-4-7 fast: $30/$150 (6x premium)
- claude-opus-4-6 fast: $30/$150 (6x premium)
Cache rates derived from the documented Prompt caching multipliers
(1.25x for 5-min cache write, 0.1x for cache read).
Note: tier tracking through CliproxyRequestDetail is not wired yet —
that's a follow-up so usage transformers can pass `serviceTier` when
Anthropic returns it on the response. Schema is in place; integration
can land independently.
Also adds a defensive `claude-opus-4-8-20260530` pricing test to exercise
`stripDateSuffix` even though Anthropic no longer issues date-stamped IDs
for the 4.6+ generation (addresses presto-review suggestion #1).
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