Large Model Inference Performance Test: Comparative Analysis of Simplismart vs. Fireworks AI on H100 for Gemma 3 4B

This article is based on athreyashreyas' open-source llm-inference-benchmark project, comparing the performance of Simplismart and Fireworks AI—two major inference platforms—running the Gemma3 4B model on dedicated H100 GPUs, to provide references for selecting inference services in production environments. Project source: GitHub (link: https://github.com/athreyashreyas/llm-inference-benchmark), published on June 7, 2026.

With the widespread application of large language models across industries, inference performance and cost have become key considerations for production deployment. Different inference service providers show significant performance differences on the same hardware, affecting user experience and operational costs. This project aims to provide objective comparative data to help developers choose the right platform. The test focuses on Simplismart and Fireworks AI, using Gemma3 4B (an open-source lightweight high-performance model) and H100 (a mainstream inference hardware in data centers).

The test was conducted on a dedicated H100 GPU (no resource sharing to avoid performance fluctuations). Key metrics include: throughput (number of requests per unit time, affecting concurrency capability), latency (first token and full response latency, affecting interactive experience), and resource utilization. The load design covers combinations of different input and output lengths, simulating scenarios from short queries to long document generation, ensuring the results have practical reference value.

Simplismart: A relatively new platform focusing on simplified deployment and performance optimization. It offers one-click deployment, OpenAI-compatible API (easy migration), and custom model upload; it uses technologies like dynamic batching, KV cache optimization, and hardware operator optimization. Fireworks AI: A mature platform known for high performance and stability. It has a deeply optimized inference engine (AOT compilation to improve performance); it provides enterprise-level features such as auto-scaling, multi-region deployment, request priority management, and supports long context window optimization.

• Throughput: Fireworks AI leads, especially with obvious advantages in high-concurrency scenarios.
• Latency: Simplismart performs better under medium concurrency; its dynamic batching balances throughput and latency, making it suitable for interactive scenarios.
• Resource Utilization: Both platforms efficiently utilize H100 computing power, but Fireworks AI is more efficient in KV cache management, resulting in more stable performance for long sequence processing.

• Pursuing extreme throughput and high concurrency: Choose Fireworks AI; its deep optimization and enterprise-level features are suitable for high-stability production environments.
• Rapid iteration/prototyping: Simplismart's ease of use and fast deployment capabilities are more valuable.
• Cost considerations: Need to comprehensively consider performance, pricing model, and feature support to calculate the actual cost per request.

Limitations: Only covers the Gemma3 4B model and H100 hardware; results may not apply to other models/hardware; the load does not cover all actual scenarios. Users are advised to verify with their own data. Future Work: Expand the test scope (more models like Llama3, Mistral; more hardware like A100, L40S; more platforms); add key production environment dimensions such as long-term stability testing and fault recovery capability evaluation.