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  1. Home
  2. Models
  3. Grok 4.5
Updated Jul 9, 2026
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Openings

How Grok 4.5 starts an answer

The first lines of 5 of its 25 written answers. Formatting stripped, words untouched.

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

1,894 words
3-Month Cutting-Edge Longevity & Performance Optimization Plan for Biohackers Disclaimer: This is an educational, research-informed framework based on current longevity science (e.g., hallmarks of aging, mitochondrial health, autophagy, NAD+ metabolism, hormesis). It is not medical advice.
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

1,791 words
All major clauses in this agreement are heavily one-sided and can be exploited against the Contractor. Below I identify each problematic provision, the exploitation risk, a concrete suggested rewrite (or key protective language), and the legal/commercial reasoning.
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…

1,578 words
Accelerated electronics from ~1920 would compress the digital and computational revolutions by roughly 20–30 years, reshaping WWII lethality and duration, advancing the Cold War into an earlier high-tech standoff, pulling the space race forward, creating an information-heavy economy by the 1950s–60s, and producing…
Read the full answer

Debug This Architecture

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

1,572 words
Architecture Review: Real-Time Collaborative Document Editor This design has fundamental real-time and consistency problems. Several choices (client clocks, LWW, per-server WebSockets + DB polling, CDN-cached APIs, full HTML snapshots) will cause data loss, stale UI, and poor scale.
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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…

1,470 words
Immediate priority: Patient safety and full, rapid compliance with legal/regulatory obligations over short-term stock price or board pressure. Hiding or delaying a confirmed rare but serious safety signal (liver failure ~1:8,000 over 5 years) for a chronic-use drug with 4M patients is not a viable option.
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Compare Grok 4.5

Grok 4.5 vs Grok 4.654 shared prompts · Landed Aug 2026
Grok 4.5 vs Ox Alpha54 shared prompts · Landed Aug 2026
Grok 4.5 vs MiniMax M353 shared prompts · Landed Jun 2026
Grok 4.5 vs Grok 453 shared prompts · Older
Grok 4.5 vs Muse Spark 1.354 shared prompts · Landed Sep 2026
Grok 4.5 vs Gemini 3.8 Flash54 shared prompts · Landed Sep 2026
Grok 4.5 vs Muse Spark 1.3 Contributor54 shared prompts · Landed Sep 2026
Grok 4.5 vs Dots3-Note Preview53 shared prompts · Landed Aug 2026
Grok 4.5 vs Seed 2.0 Code54 shared prompts · Landed Aug 2026
Grok 4.5 vs Seed 2.1 Turbo54 shared prompts · Landed Aug 2026
Grok 4.5 vs Gemini 3.7 Flash54 shared prompts · Landed Aug 2026
Grok 4.5 vs DeepSeek V4 Flash 073142 shared prompts · Landed Aug 2026

Prompts Grok 4.5 answered

  • Michelin Star Recipe Designplanning
  • Ethical Dilemma with Stakeholdersreasoning
  • Dark Mode Dashboardweb design
  • Minimalist Landing Pageweb design
  • Voxel Art Pagoda Gardenweb design
  • Satirical Fake News Headlineconversation

Alternatives to Grok 4.5

Grok 4.5 is good. These would like a word anyway.

GPT Image 2.5 Sunburst logo
GPT Image 2.5 Sunburstopenai
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
Mercury 2.5 Preview logo
Mercury 2.5 Previewinception
Granite 4.2 8B logo
Granite 4.2 8Bibm-granite
Hy4 Preview logo
Hy4 Previewtencent
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Grok 4.5

Grok 4.5

Grok:
3 logo3
3 Thinking logo3 Thinking
3 Mini Beta logo3 Mini Beta
3 Beta logo3 Beta
4 logo4
4.5 logo4.5

xAI's Grok 4.5, aimed at coding, knowledge work and STEM. 500K-token context window, text and image in, reasoning enabled via the API.

OpenRouterDocsAPI
Provider
xAI
Released
2026-07-08
Size
LARGE
Free API (OpenRouter)
No
Per 1M tokens
$2 in · $6 out
Rival’s tab
$2.13
58/58 receipts survived

Free API availability

No free endpoint for Grok 4.5 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(
"x-ai/grok-4.5"    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 27 text responses
Tick = global average
Vocabulary Diversity61%

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

Sentence Length16.1 words

Average words per sentence.

Hedging0.23

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

Bold Formatting2.5

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

List Usage2.4

Bullet and numbered list items per 1,000 characters.

Section Structure0.48

Markdown headings per 1,000 characters.

Emoji Usage0.09

Emoji per 1,000 characters.

Transitions0.06

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

Opening Habits
Consistency
83%
Across 27 responses

Favorites

Inception

Movie

Inception

20108.4
Abbey Road

Album

Abbey Road

The Beatles
The Hitchhiker's Guide to the Galaxy

Book

The Hitchhiker's Guide to the Galaxy

Douglas Adams
Paris

City

Paris

France
The Legend of Zelda: Breath of the Wild

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5
Sponsored

Model Responses

53 outputs · $2.11 tracked across 53 receipts

Reviewing agent-written code?See a Brief PR report

Workshop · 127 skills

Build with your coding agent.

Editable skills for interface polish and interaction.

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Grok 4.5 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...