inception / text-generation API-only released 2026-09-08

Mercury 2.5

Name: Mercury 2.5
Price: 0.04 USD
Author: inception

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

$0.04

Output / 1M

$0.15

Context

260K

AA Intelligence

12.3

Closed weights — available only as a hosted API text → text View on OpenRouter ↗

Pricing

via OpenRouter · USD per 1M tokens · synced 2026-10-24

$0.04

input / 1M

$0.15

output / 1M

$0.004

cached input / 1M

$0.19

1M in + 1M out

Context window: 260,000 tokens
Max output: 65,536 tokens
Providers: 1
Cheapest provider: Inception · $0.04 / $0.15
Best throughput: —
AA Intelligence / Coding / Agentic: 12.3 / — / —

✓ Tool calling ✓ Reasoning ✓ Structured outputs ✗ Image input ✗ File input ✗ Audio input ✓ Prompt caching

Price history

tracking started — chart appears after 7 days of snapshots (6 recorded)

Current: $0.04 input · $0.15 output per 1M tokens

Benchmarks

Third-party indices as published through OpenRouter — Artificial Analysis and Design Arena. Not measured by us.

AA Intelligence Index: 12.3
AA Coding Index: —
AA Agentic Index: —

Providers

1 provider · per 1M tokens · last 30 min metrics

Provider	Quant	Context	Input	Output	Uptime	Tok/s
Inception	unknown	260K	$0.04	$0.15	100%	—

Provider data from OpenRouter's endpoint listing, refreshed daily.

Specifications

Organisation: inception
Released on OpenRouter: 2026-09-08
Context window: 260,000 tokens
Max output: 65,536 tokens
Input: text
Output: text
Tokenizer: Other
Moderated by provider: No
OpenRouter id: inception/mercury-2.5

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Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.