Fireworks AI
Serverless inference for open-weight models from other labs, priced per token, with fine-tuning and dedicated GPUs billed separately.
- LLM APIs
- Yes
- Not documented
- Not documented
Who it suits.
Running open-weight models without operating GPUs — the same DeepSeek and Qwen checkpoints the labs publish, served per token, with a path to dedicated hardware if throughput demands it.
Consider something else if…
You want a frontier proprietary model: Fireworks serves other people's open weights, so the ceiling is whatever the open ecosystem has released.
Editorial · Palash Bagchi · approved
What the documentation says.
Each value below links to the page it was read from, with the sentence it came from. Criteria Fireworks AI does not publish are not listed.
Pricing
Free tier
Yes
Sources (1) →Sources ↓
- Pricing — Fireworks AI ↗
“Pay per token, with high rate limits and postpaid billing. Get started with $1 in free credits.”
Read 2026-09-06 · official pricing
Pricing model
Three products on one bill. Serverless inference is per token, per model. Fine-tuning is per million TRAINING tokens by parameter band — $0.50 for models up to 16B, $10.00 above 300B. Dedicated GPUs are hourly: $7.00 for an H100 or H200, $10.00 for a B200.
Sources (1) →Sources ↓
- Pricing — Fireworks AI ↗
“MODELS UP TO 16B PARAMETERS $0.50 $1.00 $1.00 $2.00 [...] MODELS >300B (E.G. DEEPSEEK V3, KIMI K2) $10.00 $20.00 $20.00 $40.00 [...] H100 80 GB GPU $7.00 $8.00 H200 141 GB GPU $7.00 $8.00 B200 180 GB GPU $10.00 $13.00”
Read 2026-09-06 · official pricing
Inference
Input price, top model
$3.00 per million input tokens for Kimi K3, the most expensive model in its serverless catalogue. Fireworks hosts other labs' open-weight models rather than its own, so "flagship" here means the top of what it serves.
Sources (1) →Sources ↓
- Models — Fireworks AI ↗
“Kimi K3 $3/M Input • $15/M Output • 1048576 Context”
Read 2026-09-06 · official pricing
Output price, top model
$15.00 per million output tokens for Kimi K3.
Sources (1) →Sources ↓
- Models — Fireworks AI ↗
“Kimi K3 $3/M Input • $15/M Output • 1048576 Context”
Read 2026-09-06 · official pricing
Input price, cheapest model
$0.15 per million input tokens for GLM 5.3 Flash, with output at $0.50. DeepSeek-V4-Flash is $0.22 in and $0.66 out — the same model DeepSeek itself sells at $0.44 peak.
Sources (1) →Sources ↓
- Models — Fireworks AI ↗
“GLM 5.3 Flash $0.15/M Input • $0.5/M Output • 1048576 Context [...] DeepSeek-V4-Flash-0731 $0.22/M Input • $0.66/M Output • 1048576 Context”
Read 2026-09-06 · official pricing
Context window
1,048,576 tokens on Kimi K3, GLM 5.3 and both DeepSeek V4 variants; 262,144 on Qwen3.8 and 131,072 on Muse Glimmer 30B. The window is the model's, not Fireworks'.
Sources (1) →Sources ↓
- Models — Fireworks AI ↗
“Kimi K3 $3/M Input • $15/M Output • 1048576 Context [...] Qwen3.8-2.4T-A95B $2/M Input • $6/M Output • 262144 Context [...] Muse Glimmer 30B $0.35/M Input • $1.5/M Output • 131072 Context”
Read 2026-09-06 · official pricing
Max output tokens
No separate output cap. max_tokens is bounded by the model's context length — prompt plus completion must fit inside it — and what happens on overflow is set by context_length_exceeded_behavior rather than a fixed ceiling.
Sources (1) →Sources ↓
- Chat Completions API — Fireworks docs ↗
“The maximum number of tokens to generate in the completion. If the token count of your prompt plus max_tokens exceeds the model's context length, the behavior depends on context_length_exceeded_behavior.”
Read 2026-09-07 · official docs
Prompt caching
Supported
Sources (1) →Sources ↓
- Pricing — Fireworks AI ↗
“BASE MODEL CONTEXT PREFILL / 1M CACHED PREFILL / 1M SAMPLE / 1M TRAIN / 1M QWEN 3.8 27B 128K $1.86 $0.372 $5.595 $4.103”
Read 2026-09-06 · official pricing
GPU
H100 SXM, per GPU-hour
$7.00 per hour for an H100 80GB on demand, or $8.00 on the shorter commitment shown beside it. The same rate applies to an H200 141GB.
Sources (1) →Sources ↓
- Pricing — Fireworks AI ↗
“H100 80 GB GPU $7.00 $8.00 H200 141 GB GPU $7.00 $8.00 B200 180 GB GPU $10.00 $13.00”
Read 2026-09-06 · official pricing
Largest GPU offered
180GB per GPU on a B200, at $10.00 an hour on demand.
Sources (1) →Sources ↓
- Pricing — Fireworks AI ↗
“B200 180 GB GPU $10.00 $13.00”
Read 2026-09-06 · official pricing
When these numbers change, hear about it. Sources are re-checked monthly; a repricing goes out as a short note.