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Jim Cai

Jim CaiProduct Engineer, fal Serverless · 19 articles
Python-Native Serverless GPUs: Deploy Your Own Model Without a Dockerfile
Serverless AI Inference
7 min read

Python-Native Serverless GPUs: Deploy Your Own Model Without a Dockerfile

Define a GPU app as a Python class with decorators, pick the GPU in one line, scale to zero and deploy with one command. How Python-native serverless GPUs work on fal.

Jim CaiNov 5, 2026
How to Serve a Cog Model or Custom Container as a Scalable API
Serverless AI Inference
7 min read

How to Serve a Cog Model or Custom Container as a Scalable API

Run an existing Cog image or Dockerfile as an autoscaling GPU API on fal Serverless. What changes, which migration path to pick, how scaling works and what it costs per second.

Jim CaiNov 4, 2026
Production Serverless GPU Inference: What It Needs and How to Set It Up on fal
Serverless AI Inference
7 min read

Production Serverless GPU Inference: What It Needs and How to Set It Up on fal

The eight things production serverless GPU inference needs, from a warm floor and a spend ceiling to retries, private auth and metrics, and how to set each on fal Serverless.

Jim CaiNov 3, 2026
Real-Time GPU Inference over WebSockets and WebRTC
Serverless AI Inference
8 min read

Real-Time GPU Inference over WebSockets and WebRTC

Build interactive generative apps on fal Serverless with realtime endpoints: one persistent WebSocket that skips the queue, raw WebSockets for custom protocols, and WebRTC for live video.

Jim CaiNov 2, 2026
How to Switch Serverless GPU Providers Without Downtime
Serverless AI Inference
8 min read

How to Switch Serverless GPU Providers Without Downtime

Looking for a serverless GPU alternative? Test capacity, stability, outages and support before you move, then migrate inference with no downtime.

Jim CaiNov 1, 2026
How to Fine-Tune FLUX With an API: When It Pays, Which Model, What It Costs
Generative Media for Developers
12 min read

How to Fine-Tune FLUX With an API: When It Pays, Which Model, What It Costs

Why teams fine-tune FLUX, when reference images suffice, which FLUX to train on (FLUX 3 Image Klein, FLUX.2, FLUX.1) and what 1,000 images cost after training.

Jim CaiOct 31, 2026
How to Deploy a LoRA as an API
Serverless AI Inference
8 min read

How to Deploy a LoRA as an API

Two ways to turn a custom LoRA into an API on fal: hosted trainers and LoRA inference APIs with no servers, or your own trainer and serving app on fal Serverless.

Jim CaiOct 30, 2026
NVIDIA GB200 Price in 2026: What a GPU, a Tray and an NVL72 Rack Cost
Serverless AI Inference
7 min read

NVIDIA GB200 Price in 2026: What a GPU, a Tray and an NVL72 Rack Cost

The GB200 is sold as a superchip and deployed as a 72-GPU NVL72 rack. This guide prices each unit per hour, explains when the rack-scale NVLink domain is worth paying for, and compares GB200 with B200 and B300.

Jim CaiOct 30, 2026
How to Deploy a Video Generation Model in Production
Serverless AI Inference
8 min read

How to Deploy a Video Generation Model in Production

Serve Wan and other open video models as a queue-backed API on fal Serverless: pick a GPU with hardware encoders, keep weights on /data, cut cold starts and scale between bursts.

Jim CaiOct 29, 2026
NVIDIA RTX PRO 6000 Price in 2026: Hourly Rates, Media Workloads and H100 Comparison
Serverless AI Inference
7 min read

NVIDIA RTX PRO 6000 Price in 2026: Hourly Rates, Media Workloads and H100 Comparison

NVIDIA RTX PRO 6000 price in 2026: about $15,000-$16,000 to buy, $4.00 per GPU-hour on fal. Specs, image and video cost math, and RTX PRO 6000 vs H100.

Jim CaiOct 29, 2026
ComfyUI API: Deploy a ComfyUI Workflow as an Endpoint
Serverless AI Inference
9 min read

ComfyUI API: Deploy a ComfyUI Workflow as an Endpoint

Turn a ComfyUI workflow into an API on fal Serverless: export it in API format, wrap ComfyUI in a fal.App, keep checkpoints on /data and deploy an autoscaling GPU endpoint.

Jim CaiOct 28, 2026
NVIDIA H200 Price in 2026: Specs, Hourly Rates and Buy vs Rent
Serverless AI Inference
6 min read

NVIDIA H200 Price in 2026: Specs, Hourly Rates and Buy vs Rent

NVIDIA H200 price in 2026: about $30,000-$34,000 to buy, $6.00 per GPU-hour on fal, billed per second. Specs, H100 and B200 comparison, buy vs rent.

Jim CaiOct 28, 2026
How to Deploy ML Models on GPUs Without Kubernetes
Serverless AI Inference
8 min read

How to Deploy ML Models on GPUs Without Kubernetes

Deploy any Python model as an autoscaling GPU API on fal Serverless from one class, a custom container or an existing HTTP server, with no Docker or Kubernetes to run.

Jim CaiOct 27, 2026
NVIDIA H100 Price in 2026: Specs, Hourly Rates and Buy vs Rent
Serverless AI Inference
6 min read

NVIDIA H100 Price in 2026: Specs, Hourly Rates and Buy vs Rent

NVIDIA H100 price in 2026: about $27,000–$37,000 to buy, $4.50/h on fal billed per second. Specs, A100 comparison and buy-vs-rent break-even.

Jim CaiOct 27, 2026
Serverless Inference: How Autoscaling and Scale-to-Zero Work
Serverless AI Inference
8 min read

Serverless Inference: How Autoscaling and Scale-to-Zero Work

How fal Serverless sizes your GPU fleet: what each runner state costs, how min_concurrency, keep_alive, concurrency_buffer and max_concurrency combine, and how to tune a live app.

Jim CaiOct 26, 2026
How to Choose a Serverless GPU Platform for Production Inference (2026)
Serverless AI Inference
9 min read

How to Choose a Serverless GPU Platform for Production Inference (2026)

A buyer's checklist for serverless GPU inference in 2026: cold starts, billing granularity, GPU types and prices, scaling controls, containers, SLA, observability and migration effort, with a workload-by-workload guide.

Jim CaiOct 20, 2026
Dedicated GPUs vs Serverless Inference: How to Find Your Break-Even
Serverless AI Inference
12 min read

Dedicated GPUs vs Serverless Inference: How to Find Your Break-Even

The utilisation at which a reserved H100 or B200 costs less than per-second billing, why billed time matters more than busy time, and how to size a reserved floor with burst capacity on top.

Jim CaiOct 19, 2026
NVIDIA B200 Price in 2026: Specs, Hourly Rates and Reserved Capacity
Serverless AI Inference
9 min read

NVIDIA B200 Price in 2026: Specs, Hourly Rates and Reserved Capacity

The NVIDIA B200 pairs 192 GB of HBM3e with 8 TB/s of memory bandwidth and native FP4. This guide covers its specs, the three ways B200 time is priced (hourly, per second, reserved), and fal's published B200 rate with worked cost examples.

Jim CaiOct 19, 2026
How to Fine-Tune Wan 2.2 With an API
Generative Media for Developers
8 min read

How to Fine-Tune Wan 2.2 With an API

A step-by-step guide to training a Wan 2.2 LoRA on fal with cURL and Python: dataset layout, the trainer endpoint and its inputs, the published per-step price, and calling the trained LoRA from the Wan 2.2 text-to-video endpoint.

Jim CaiOct 16, 2026