# Fireworks AI vs DeepSeek

> DeepSeek sells its own models cheaply from a China-hosted API. Fireworks serves the same DeepSeek V4 Pro weights fast, with SOC 2, HIPAA and fine-tuning.

Canonical: https://www.subconscious.dev/compare/fireworks-vs-deepseek · By The Subconscious Team · Updated September 30, 2026

## How they compare

Here a lab and a host of its model meet head-on. DeepSeek serves V4 Pro and V4.1 Flash first-party, both with 1M context and 384K max output, and ships the weights on Hugging Face under MIT. Low, high and max reasoning effort settings give developers a direct lever on output tokens. Fireworks hosts DeepSeek V4 Pro among 400+ models, posts 167 to 174 tokens per second on it in third-party tests, and keeps the full 1M window. On V4 Pro, model quality is a wash. The real questions are price, data location and control.

DeepSeek's first-party price is low, it bills half rate outside two weekday peak windows, and cache hits cost a few cents per million or less. The catch is that hosted data is stored in China, a hard stop for many enterprises, and frequent retirements and repricing keep cost models moving. Fireworks brings SOC 2, HIPAA and ISO, marketplace billing, and the option to fine-tune DeepSeek with SFT, DPO or RL at base serving price. Cost-sensitive batch work that can run off-peak fits DeepSeek. Regulated or customized production fits Fireworks.

## What each one does

### Fireworks AI

Fireworks AI was founded in 2022 by former Meta PyTorch engineers led by CEO Lin Qiao, and it sells speed on open models. Its custom serving stack has posted 167 to 174 tokens per second on DeepSeek V4 Pro in third-party measurements, several times what most GPU peers hit on the same model. The catalog holds 400+ models across text, vision, audio and embeddings, served through an OpenAI-compatible API. In July 2026 it raised a $1.505B Series D at a $17.5B valuation, with a reported $1B+ run rate and 40T+ tokens a day.

### DeepSeek

DeepSeek is the Chinese lab whose open-weight models reset price expectations for the whole market. Its API now serves two models, both with 1M context and 384K max output. V4.1 Flash shipped September 10, 2026 with built-in image understanding at $0.30 in and $1.20 out at peak. V4 Pro, generally available since August 13, costs $1.32 in and $3.96 out at peak. Cache hits cost a few cents per million or less, and the weights ship on Hugging Face under an MIT license.

## Which is best, and when

### Choose Fireworks AI for

- Enterprises that cannot send data to a China-stored API
- Fine-tuning DeepSeek and serving it at base price
- Workloads needing SOC 2, HIPAA or ISO

### Choose DeepSeek for

- Off-peak batch work at half the peak rate
- Agents that reread long prefixes, given very cheap cache hits
- Teams with no restriction on China-hosted data

## At a glance

| Attribute | Fireworks AI | DeepSeek |
|---|---|---|
| Model access | Open weights | Open weights (MIT) |
| Flagship models | DeepSeek V4 Pro, Kimi K3 | DeepSeek V4.1 Flash, V4 Pro |
| Speed | 167–174 tok/s on DeepSeek V4 Pro | ~35 tok/s on V4 Pro |
| Price | Fine-tunes served at base price | Off-peak hours at half price |
| Customization | SFT, DPO, RFT; Training API | Open weights to fine-tune |
| Deployment | Serverless, dedicated GPUs | First-party API, Hugging Face weights |
| Long context | Full 1M on DeepSeek V4 Pro | 1M, 384K max output |

## FAQ

### What is the difference between Fireworks AI and DeepSeek?

DeepSeek sells its own models cheaply from a China-hosted API. Fireworks serves the same DeepSeek V4 Pro weights fast, with SOC 2, HIPAA and fine-tuning.

### When should I choose Fireworks AI over DeepSeek?

Enterprises that cannot send data to a China-stored API; Fine-tuning DeepSeek and serving it at base price; Workloads needing SOC 2, HIPAA or ISO.

### When should I choose DeepSeek over Fireworks AI?

Off-peak batch work at half the peak rate; Agents that reread long prefixes, given very cheap cache hits; Teams with no restriction on China-hosted data.

### Is Fireworks AI or DeepSeek cheaper?

Fireworks AI: Fine-tunes served at base price. DeepSeek: Off-peak hours at half price. The cheaper choice depends on the model and workload.

### Which has more context, Fireworks AI or DeepSeek?

Fireworks AI: Full 1M on DeepSeek V4 Pro. DeepSeek: 1M, 384K max output.

## Running long-horizon agents?

If your agents run past 200K tokens, compare both against Subconscious: [Subconscious vs Fireworks AI](https://www.subconscious.dev/compare/subconscious-vs-fireworks.md), [Subconscious vs DeepSeek](https://www.subconscious.dev/compare/subconscious-vs-deepseek.md).

Full profiles: [Fireworks AI](https://www.subconscious.dev/providers/fireworks.md), [DeepSeek](https://www.subconscious.dev/providers/deepseek.md).