Calcium-Ion e9d4d6353c feat(billing): bill OpenAI 12-hour prompt cache writes at their own price (#7965) ...

OpenAI added a 12-hour prompt cache to the Responses API on 2026-10-20
(prompt_cache_options.ttl "12h", GPT-5.6 and later). A 12-hour write
costs 2.5x the input price, twice the 30-minute write. We already
forwarded the option but billed every cache write at the 30-minute price.

- Read cache_write_tokens_details from Responses usage and keep the split
  through streaming, compaction and format conversion.
- Ratio pricing bills 12-hour writes at twice the cache write ratio, the
  same way Claude 1-hour writes use 6/3.75.
- Expressions get a cc12h price. When an expression leaves the long-lived
  price out, 12-hour writes cost twice the cc price and Claude 1-hour
  writes 6/3.75 times it; without a cc price they bill as input. Claude
  cache writes are no longer free when an expression omits cc or cc1h.
- gpt-6-astra prices 12-hour writes at $25 ($50 above 272K tokens).
- GPT models with a cache write ratio convert to expressions with cc12h.
- Chat Completions forwards prompt_cache_options.
- The pricing editor, cost estimator, pricing pages and usage log details
  show the 12-hour price and tokens.

2026-10-22 22:41:17 +08:00

..

builtin_billing_test.go

feat(billing): bill OpenAI 12-hour prompt cache writes at their own price (#7965)

2026-10-22 22:41:17 +08:00

builtin_billing.go

feat(billing): bill OpenAI 12-hour prompt cache writes at their own price (#7965)

2026-10-22 22:41:17 +08:00

tiered_billing_test.go

feat(billing): support fixed per-request expression pricing

2026-09-09 15:05:37 +08:00

tiered_billing.go

feat(plugins): enhance task streaming and model pricing

2026-09-11 21:44:56 +08:00