Mercury 3 API

Mercury 3 is a chat model developed by Inception designed for advanced reasoning and text processing.

Modalities
TextText
In / Out price
$0.2116/$0.7406per 1M
Context window
1M tokens
Released
Oct 16, 2026

Mercury 3 overview

The pelican test: one prompt, every text model, unedited SVG output from Nov 3, 2026.

SVG of a pelican riding a bicycle, written by Mercury 3 through AI/ML API

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

Mercury 3 pricing in US dollars
UsagePriceUnit
Input$0.21161M tokens
Output$0.74061M tokens
Cached input$0.02121M 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.

AI/ML API model prices in USD per million tokens
ModelInputOutput
Mercury 3$0.2116$0.7406
Hermes 3 70B Instruct$0.7406$0.7406
Mercury 2.5$0.2116$0.7935
Mercury 2$0.2645$0.7935
Small 4$0.1984$0.7935

How to use the Mercury 3 API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export 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."
    }
  ]
}'

Related articles

All posts

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.

Start building with Mercury 3

Mercury 3 API

inception/mercury-3

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key
export 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."
    }
  ]
}'