Every frontier model.
One endpoint.
GPT-5.x, Claude, and open models through a single OpenAI-compatible API — about 50% cheaper, with streaming, tools, and reasoning built in.
Base URL
https://ai.wisper.sh/v1
GPT-5.5
Claude Opus 4.8
GLM-5.2
Kimi K2.7
Works with the OpenAI SDK, Claude Code & Codex