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  1. Home
  2. Models
  3. Mercury 2.5 Preview
Updated Sep 2, 2026
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Openings

How Mercury 2.5 Preview starts an answer

The first lines of 5 of its 24 written answers. Formatting stripped, words untouched.

Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

784 words
Here is an analysis of the potential failure modes, race conditions, and scaling bottlenecks in the proposed architecture, along with specific solutions and their trade-offs.
Read the full answer

Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

748 words
Dish Title: Lithospheric Tides Conceptual Narrative This dish explores the geological convergence of the deep ocean and the subterranean earth. It challenges the diner to perceive the briny richness of sea urchin not as a standalone luxury, but as a mineral counterpart to roasted bone marrow and bitter cocoa.
Read the full answer

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

709 words
This is a critical governance and safety scenario. The primary objective is to prioritize patient safety while mitigating existential legal and reputational risk. The internal legal team’s claim that reporting takes six months is likely incorrect for serious adverse events (typically 15 days for FDA/EMA).
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

683 words
Shifting the invention of the solid-state switch to 1920 accelerates the Information Age by roughly three decades. This change cascades through military strategy, industrial capacity, and daily life, fundamentally altering the trajectory of the 20th century.
Read the full answer

Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

608 words
For the Experienced Software Engineer Think of training as a massive distributed job where the model is a stateful service learning to minimize error on a specific objective function. Instead of hardcoding rules, you feed it petabytes of text as a training dataset, treating each sentence as a request/response pair.
Read the full answer

Compare Mercury 2.5 Preview

Mercury 2.5 Preview vs Ox Alpha54 shared prompts · Landed Aug 2026
Mercury 2.5 Preview vs Nemotron 3.5 Lightning54 shared prompts · Landed Aug 2026
Mercury 2.5 Preview vs Qwen3.8 27B53 shared prompts · Landed Aug 2026
Mercury 2.5 Preview vs GPT-5.6 Luna54 shared prompts · Landed Jul 2026
Mercury 2.5 Preview vs GPT-5.6 Luna Pro54 shared prompts · Landed Jul 2026
Mercury 2.5 Preview vs MiniMax M353 shared prompts · Landed Jun 2026
Mercury 2.5 Preview vs Claude Opus 4.653 shared prompts · Premium
Mercury 2.5 Preview vs GPT-6 Astra54 shared prompts · Landed Sep 2026
Mercury 2.5 Preview vs Muse Spark 1.354 shared prompts · Landed Sep 2026
Mercury 2.5 Preview vs Hy4 Preview54 shared prompts · Landed Sep 2026
Mercury 2.5 Preview vs Gemini 3.8 Flash54 shared prompts · Landed Sep 2026
Mercury 2.5 Preview vs Muse Spark 1.3 Contributor54 shared prompts · Landed Sep 2026

Prompts Mercury 2.5 Preview answered

  • Mini Rhythm Game Snippetweb design
  • Three.js 3D Gameweb design
  • Realistic AI Interviewconversation
  • World Map SVGimage generation
  • Debug This Architecturereasoning
  • Animated Digital Business Cardweb design

Alternatives to Mercury 2.5 Preview

Mercury 2.5 Preview is good. These would like a word anyway.

GPT-6 Astra Pro logo
GPT-6 Astra Proopenai
Muse Spark 1.3 Contributor logo
Muse Spark 1.3 Contributormeta
Gemini 3.8 Flash logo
Gemini 3.8 Flashgoogle
Claude Fable 5.1 logo
Claude Fable 5.1anthropic
Granite 4.2 8B logo
Granite 4.2 8Bibm-granite
Hy4 Preview logo
Hy4 Previewtencent
Ox Alpha logo
Ox Alphaopenrouter
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Mercury 2.5 Preview

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.

OpenRouter
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: 16 Sep 2026 · OpenRouter 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

The Matrix

Movie

The Matrix

19998.3
Random Access Memories

Album

Random Access Memories

Daft Punk
Neuromancer

Book

Neuromancer

William Gibson
Tokyo

City

Tokyo

Japan
Minecraft

Game

Minecraft

Action, Arcade4.4
Sponsored

Model Responses

53 outputs · $0.02 tracked across 53 receipts

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Workshop · 127 skills

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Editable skills for interface polish and interaction.

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Mercury 2.5 Preview vs Ox Alpha

Real outputs compared side by side

RANKINGS

Best AI for Creative Writing

A stand-up set with puns banned, a manifesto against CAPTCHA, an interview wi...