Inception: Mercury 3

Text input Text output
Author's Description

Mercury 3 is a diffusion-based language model from Inception, and the lab's most capable model to date. It is suited for agentic workflows and real-time applications where latency compounds, such...

Key Specifications
Cost
$$$$
Context
1M
Released
Oct 16, 2026
Speed
★★
Ability
★★★
Reliability
★★
Supported Parameters

This model supports the following parameters:

Response Format Structured Outputs Tools Max Tokens Reasoning Stop Temperature Tool Choice Include Reasoning
Features

This model supports the following features:

Structured Outputs Response Format Tools Reasoning
Performance Summary

Inception’s Mercury 3, a diffusion-based language model featuring an extensive 1,000,000-token context window, delivers a well-rounded profile characterized by competitive response times and competitive pricing. The model demonstrates exceptional reliability, achieving a 96% operational success rate with minimal technical failures across tested benchmarks. Mercury 3 performs particularly well in structured and analytical environments. Its primary strength lies in instruction following, where it reaches the 90th percentile with 85.0% accuracy across complex, multi-layered requirements. It also displays remarkable capability in multi-step reasoning, achieving 96.0% accuracy with exceptionally fast turnaround times that place it in the 96th percentile for reasoning speed. In programming evaluations, it maintains a solid 91.0% accuracy, reinforcing its aptitude for agentic workflows. However, advanced mathematics represents the model’s notable weakness. Scoring 80.6% accuracy, it placed in the 28th percentile relative to competitors, alongside slower completion times and higher resource costs on quantitative problems. Despite this limitation, Mercury 3’s high operational stability, rapid reasoning, and top-tier instruction adherence make it a dependable, cost-effective choice for latency-critical and agentic deployments.

Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $0.1
Completion $0.35
Input Cache Read $0.01

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Inception
Inception | inception/mercury-3-20261019 1M $0.1 / 1M tokens $0.35 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Strategy Free Executions Accuracy Cost Duration
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