Is Fireworks AI free for LLM API?

No — there's no free plan, but no monthly fee either: you pay for what you use (Kimi K3: input tokens $3 per million tokens, output tokens $15 per million tokens).

How much does Fireworks AI cost for LLM API?

Pay per token for other labs' open-weight models, e.g. $0.15 / $0.60 per million input/output tokens on gpt-oss-120B and $3 / $15 on Kimi K3. At list prices: input tokens 5 million tokens, output tokens 1 million tokens: $1.25/month (GLM 5.3 Flash); input tokens 50 million tokens, output tokens 10 million tokens: $13/month (GLM 5.3 Flash); input tokens 1 billion tokens, output tokens 200 million tokens: $250/month (GLM 5.3 Flash).

Fireworks AI pricing

How Fireworks AI charges, what to know before you commit, and what you'd pay at your usage — next to what the alternatives would cost for the same thing.

How it charges

Checked 2026-10-07 on docs.fireworks.ai ↗ · USD, list prices

In short

Pay per token for other labs' open-weight models, e.g. $0.15 / $0.60 per million input/output tokens on gpt-oss-120B and $3 / $15 on Kimi K3.

Free plan: Yes
Side project: $1.25/mo GLM 5.3 Flash
Growing: $13/mo GLM 5.3 Flash
Scaling: $250/mo GLM 5.3 Flash

What the model leaves out

Serverless standard prices for the models also sold by their own labs. Models not listed are priced by size, from $0.10 per million tokens under 4B parameters.

Before you commit

Priority mode costs 1.2–1.5× standard, and 'Fast' and US-only variants cost more.
Batch inference is half price.

Plan	Monthly fee	Input tokens per month	Output tokens per month
Kimi K3	None	$3 per million tokens	$15 per million tokens
Qwen 3.8 Max	None	$2 per million tokens	$6 per million tokens
GLM 5.3	None	$1.4 per million tokens	$4.4 per million tokens
MiniMax M3	None	$0.3 per million tokens	$1.2 per million tokens
DeepSeek V4.1 Flash	None	$0.3 per million tokens	$1.2 per million tokens
GLM 5.3 Flash	None	$0.15 per million tokens	$0.5 per million tokens
gpt-oss-120B	None	$0.15 per million tokens	$0.6 per million tokens

What you'd pay

Input tokens per month50 million tokensOutput tokens per month10 million tokens

GLM 5.3 Flash50 million tokens × $0.15 per million tokens + 10 million tokens × $0.5 per million tokens$13/mo

The same usage elsewhere

OpenAI APIGPT-6 Luna$10saves $2.50

ClaudeClaude Haiku 5.5$10saves $2.50

Gemini APIGemini 3.1 Flash-Lite$28+$15

GroqGPT OSS 20B$6.75saves $5.75

Mistral AIMinistral 3 (3B)$6.00saves $6.50

DeepSeekdeepseek-flash$27+$15

Cost as you grow

Fireworks AI DeepSeek Mistral AI Groq Gemini API Claude OpenAI APIx: input tokens per month (million tokens), other usage scaled with it · cheapest usable plan at each point, list prices

All LLM API pricing, compared →Which one fits your situation →