Cortex Training: Serverless Fine-Tuning for Open-Weight LLMs
Snowflake, Tuesday, November 3rd, 2026
Snowflake launches Cortex Training in public preview, a serverless service for fine-tuning and deploying open-weight LLMs.
Snowflake says enterprises can customize open-weight models with their own data instead of relying on costly closed models, but doing so has required complex GPU infrastructure.
Cortex Training lets teams use familiar frameworks or build custom training loops with low-level serverless APIs, without handling GPU provisioning, scheduling, checkpointing or distributed execution.
It supports post-training methods such as supervised fine-tuning and reinforcement learning and is built on an open source backend.
Snowflake cites benchmarks showing up to 61 percent lower cost than competing serverless offerings.