Mercury 3 overview
Mercury 3 by Inception
Mercury 3 is a chat model from Inception that excels in reasoning and structured output. It supports streaming and tool integration for complex workflows.
Mercury 3 specs
- Model ID
inception/mercury-3- Developer
- Inception
- Context window
- 1,000,000 tokens
- Max output
- 131,072 tokens
- Input
- Text
- Output
- Text
- API
- OpenAI-compatible, base URL
https://api.aimlapi.com/v1
What Is Mercury 3 API?
Mercury 3 is a specialized chat model built by Inception to handle complex text based tasks. It is designed to provide high quality reasoning and reliable outputs for various applications.
The model architecture supports streaming responses and structured data formats. It integrates seamlessly with external tools to enhance its functional capabilities.
Advanced Reasoning
The model is built to handle complex logical tasks and provide coherent responses.
Structured Output
Generate data in specific formats to ensure compatibility with your existing systems.
Tool Integration
Connect the model to external tools to expand its operational reach.
Streaming Support
Receive model outputs in real time as they are generated.
Use cases
Automate complex reasoning tasks for data analysis.
Generate structured text outputs for software integration.
Build interactive chat applications with tool support.
Process long form text documents with a large context window.
Capabilities
- Reasoning
- Streaming
- Structured outputs
- Function calling
Mercury 3 API pricing
| Usage | Price | Unit |
|---|---|---|
| Input | $0.2116 | 1M tokens |
| Output | $0.7406 | 1M tokens |
| Cached input | $0.0212 | 1M tokens |
Prices from the AI/ML API price list, checked on Nov 4, 2026.
Mercury 3 vs other models: token prices
AI/ML API input and output rates for 5 models, per million tokens.
| Model | Input | Output |
|---|---|---|
| $0.2116 | $0.7406 | |
| $0.7406 | $0.7406 | |
| $0.2116 | $0.7935 | |
| Mercury 2 | $0.2645 | $0.7935 |
| $0.1984 | $0.7935 |
How to use the Mercury 3 API
View docsBuild with your agent
Give your agent the model details, code and documentation.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl 'https://api.aimlapi.com/v1/chat/completions' \
-H "Authorization: Bearer $AIMLAPI_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "inception/mercury-3",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "inception/mercury-3",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}
response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "inception/mercury-3",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());Related articles
Mercury 3 FAQ
How much does Mercury 3 cost?
Mercury 3 costs $0.2116 input and $0.7406 output per 1M tokens on AI/ML API, billed as you go with no subscription.
Who developed Mercury 3?
Mercury 3 was developed by Inception.
What modalities does this model support?
The model supports text to text generation.
What is the context window size?
The model supports a context window of 1,000,000 tokens.
Does the model support tools?
Yes, Mercury 3 supports tool integration.
What is the Mercury 3 model ID?
Use inception/mercury-3 as the model parameter. Requests go to the OpenAI-compatible endpoint with your AI/ML API key.

