Changelog

2026-07-16 — launch day

• Site launched with eleven pages: home, API guide, pricing, prompt caching, context window, latency, error reference, the empty-response deep dive, cost calculator, this changelog, and about.
• First measurement run published. Ran kimi-k3 against api.moonshot.ai and captured: the empty-response trap at six budgets, reasoning-token share (43–77% of output), 256-token cache block granularity across nine prefixes, prompt_cache_key having no measurable effect, cache persistence to at least 210s, and latency from ~90 to 497,718 prompt tokens. The raw dataset is published on this site.
• Pricing verified against the official page: $3.00 / $0.30 / $15.00 per 1M, context 1,048,576. EvoLink confirmed carrying kimi-k3 at the same rates, no markup.
• Correction, pre-publication: two error-table entries drafted from documentation before we had a key — reasoning_effort validation and the max_completion_tokens ceiling — were disproved by measurement (both return HTTP 200) and replaced with what actually happens.
• Correction, pre-publication: our first prompt_cache_key test reused a prefix warmed by an earlier test, invalidating the result. Re-ran with a fresh prefix; the clean test is what's published.
• Chinese edition launched. All eleven pages published in Simplified Chinese under /zh/, mirroring the English content one-to-one and cross-linked via hreflang.
• Russian edition launched. All eleven pages published in Russian under /ru/, mirroring the English content one-to-one and cross-linked via hreflang.

Earlier entries don't exist — this is day one. The commitment going forward: prices re-checked against the official page and re-stamped on change; new measurements dated; corrections listed here.