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Inception Labs

Mercury 2.5 fast

inception/mercury-2-5

Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception. Instead of generating tokens sequentially, Mercury 2.5 produces and refines multiple tokens in parallel, achieving...

Input / 1M

$0.20

USD per million tokens

Output / 1M

$0.75

USD per million tokens

Est. cost / token

$0.000000337

$0.34 per 1M, 3:1 mix

Context window

260K

max output 66K

Major features

CachingReasoningJSON schemaTools

Task suitability (heuristic 1–5, not a benchmark)

  • coding3
  • reasoning3
  • math3
  • summarization4
  • extraction4
  • classification4
  • chat3
  • creative3
  • translation4
  • vision1
  • long context3
  • agentic3

Price history

RecordedInputOutputCachedSource
2026-11-05 03:20$0.20$0.75$0.020litellm+openrouter

A row is added whenever a sync detects a price change. Vendor pricing source

Pricing (USD per 1M tokens)

Input
$0.20
Output
$0.75
Cached input
$0.020
Blended (3:1)
$0.34

Details

Company
Inception Labs
Version
2.5
Family
Mercury
Released
2026-09-08
Parameters
Undisclosed
Max output
66K
Open weights
No
Inputs
text
Last synced
32 min ago