Serverless Providers Produce Different LLM Behavior Across Deployments

The same LLM can behave like a different model depending on which serverless inference provider runs it. In a vendor benchmark from DigitalOcean (published June 2026), provider rankings flipped entirely by model: one provider ran Llama 3.3 70B 3x faster than a competitor but served Gemma 4 5x slower on the same hardware pool. Beyond speed, providers also diverge on output fidelity (some serve undisclosed FP8 or FP4 quantized variants that subtly alter outputs), parameter compliance (a request to disable a reasoning model's thinking pass may be silently ignored), and availability (niche models can run erratically). The takeaway for practitioners: benchmark the specific model and workload before committing to a provider, focusing on TTFT stability (p50-to-p95 spread), tail latency, and cost per completed answer - not headline token throughput.