Mercury 2.5 Preview

Inception's diffusion language model generates and refines tokens in parallel instead of one at a time. It reaches a reported 1,107 tokens per second on standard GPUs, with a 260K-token context window and a claimed 10-point intelligence gain over Mercury 2.

Provider: Inception
Released: 2026-08-31
Size: MEDIUM
Free API (OpenRouter): No
Per 1M tokens: $0.04 in · $0.15 out
Rival’s tab: $0.02; 58/58 receipts survived

Free API availability

No free endpoint for Mercury 2.5 Preview was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 9 Sep 2026OpenRouter usage limits

View API options

Get API accessProvider and language code samples

Provider

fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"inception/mercury-2.5-preview"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Deep analysisPsychometrics, taste index, writing DNA

Writing DNA

Stylometric Fingerprint

Based on 26 text responses

Tick = global average

Vocabulary Diversity65%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length13.9 words

Average words per sentence.

Hedging0.44

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting4.9

**Bold** markers per 1,000 characters.

List Usage3.3

Bullet and numbered list items per 1,000 characters.

Section Structure0.79

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.20

"However", "moreover", "furthermore" per 100 words.

Opening Habits

Consistency

74%

Across 26 responses

Favorites

Movie

The Matrix

19998.3

Album

Random Access Memories

Daft Punk

Book

Neuromancer

William Gibson

City

Tokyo

Japan

Game

Minecraft

Action, Arcade4.4

Model Responses

53 outputs · $0.02 tracked across 53 receipts

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