Claude Opus 5.5 API

Claude Opus 5.5 is an AI chat model by Anthropic.

Kind: chat
Brand: Anthropic
Price: 320 credits / M input tokens, 1600 / M output (1 credit = $0.01 on monthly plans)
Released: 2026-09-28
Inputs: model, messages, tools, tool_choice, stream, max_tokens, temperature, top_p, stop, response_format, reasoning_effort

Call it with POST https://api.unicornapi.net/v1/chat/completions and model claude-opus-5-5.