Parasail

Parasail runs open models from many vendors behind one API. In LM15 its provider is parasail.

Provider	parasail (litellm spelling: parasail/)
Key	PARASAIL_API_KEY, from saas.parasail.io/keys
Model names	the vendor’s name: parasail:meta-llama/Llama-3.3-70B-Instruct
Needs	Python 1.1.0, TypeScript 1.0.0-rc.2, Rust 1.0.0-rc.2, Go v1.1.0-rc.2 or later

Chat, streaming, tools (including a forced tool choice), structured output and the model list work as with any provider. Measured against Parasail on September 26, 2026:

• Reasoning off is refused by Parasail, with a clear error, on gpt-oss, which can’t stop reasoning. Some models (DeepSeek V3.1, Qwen3.5) turn thinking on and off through their own settings; pass those in the request’s extensions.
• Images inside a tool result reach the model.
• A model that doesn’t exist raises UnsupportedModelError, as on every provider, though Parasail words it as a missing deployment.