LangChain Fireworks integration adds reasoning_effort parameter

Full analysis

LangChain released version 1.5.0 of its Fireworks AI partner integration, with the substantive change being the addition of reasoning_effort as a standard chat model parameter in LangChain core. This parameter, common in reasoning-focused models (models that perform multi-step internal deliberation before responding), is now surfaced as a first-class config option, making it easier for agent builders to tune cost-vs-quality trade-offs when using Fireworks-hosted models within LangChain/LangGraph pipelines. The remaining changes are dependency bumps and security patches.