* fix(model_prices): apply claude-sonnet-5 introductory pricing through 2026-08-31
Anthropic launched Sonnet 5 with introductory pricing of $2/$10 per million
input/output tokens through August 31, 2026 (sticker price $3/$15 applies
from September 1, 2026). Bedrock, Vertex AI, and Azure Foundry mirror the
introductory rate. LiteLLM was charging the sticker price on all ten
claude-sonnet-5 entries, over-billing by 50% during the introductory period.
Update input, output, cache write (5m and 1h), and cache read costs on the
base entries to the introductory rate, and keep the 10% cross-region premium
on the us/eu/au/jp Bedrock inference profiles on top of it. Also add an
anthropic-sonnet-5 entry to the dev proxy config.
* test: document exact sticker prices to restore on 2026-09-01
Register claude-sonnet-5 across the Anthropic, Bedrock (base + global/us/eu/au/jp
cross-region inference profiles), Vertex AI, and Azure AI cost-map entries in both
the root and bundled-backup model maps, plus BEDROCK_CONVERSE_MODELS and the
setup-wizard provider list.
Sonnet 5 ships with the gen-5 adaptive-thinking profile (adaptive thinking always
on, no extended thinking, effort defaults to high), so the entries mirror the
Fable 5 / Opus 4.8 sampling-param and prefill restrictions rather than the older
Sonnet 4.6 behavior: supports_sampling_params and supports_assistant_prefill are
false while supports_adaptive_thinking, supports_xhigh_reasoning_effort, and
supports_max_reasoning_effort are true. Pricing follows standard Sonnet rates
($3 / $15 per MTok) with the 10% regional premium on the us/eu/au/jp profiles.
Add a reasoning-effort grid entry for the Anthropic direct route and a regression
test pinning pricing, capabilities, regional premiums, backup parity, and bare-name
provider resolution.
Co-authored-by: Mateo Wang <mateo-berri@users.noreply.github.com>
