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  5. Grok 4.1 FastvsLing 3.0 Flash VL (free)
Updated Sep 2026

Grok 4.1 FastvsLing 3.0 Flash VL (free)

Ling 3.0 Flash VL (free) is the newer model, released after Grok 4.1 Fast.

Grok 4.1 Fast and Ling 3.0 Flash VL (free) compared across 18 shared prompts
SpecGrok 4.1 FastLing 3.0 Flash VL (free)
Input price—Free
Output price—Free
Context window—262K tokens
Free API (OpenRouter)NoYes (1 provider)
ReleasedNov 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 18 prompts both answered. Formatting stripped, words untouched.

Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

Grok 4.1 Fast385 words
Simplified LBO Model (FY2026–FY2030, $m) Year Revenue EBITDA TL Cash Int. Mezz Cash Int. Cash Taxes Capex ΔNWC FCF After Debt Service* End TL End Mezz End Total Debt FY26 972.0 136.1 43.2 21.6 17.8 29.2 0.4 19.1 456.1 183.6 639.7 FY27 1,040.0 156.0 41.1 22.0 23.2 31.2 0.3 33.6 417.9 187.3 605.2 FY28 1,102.4 176.4 37.6…
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Ling 3.0 Flash VL (free)576 words
HarborTech Services (HTS) — LBO Underwriting Analysis ENTRY SUMMARY (End FY2025) Item Value FY2025 EBITDA $120.0m Purchase EV (12.0x) $1,440.0m Transaction Fees (2.0%) $28.8m Total Uses $1,468.8m Term Loan (4.0x) $480.0m Mezzanine (1.5x) $180.0m Total Debt $660.0m Equity Check $808.8m YEAR-BY-YEAR MODEL (FY2026–FY2030…
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Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

Grok 4.1 Fast555 words
1-Month Plan for Better Health and Longevity This beginner-friendly plan focuses on three foundational areas: Diet, Exercise, and Sleep. These pillars drive longevity by reducing inflammation, building resilience, and optimizing recovery. Commit to small, consistent changes—aim for 80% adherence.
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Ling 3.0 Flash VL (free)493 words
🌱 Your 1-Month Health & Longevity Starter Plan 🥗 Key Area 1: Diet — Nourish Your Body Week 1: Add one extra serving of vegetables to your day (e.g., a handful of spinach in your morning eggs or a side salad at dinner). Week 2: Swap one sugary drink (soda, juice, sweetened coffee) per day for water or herbal tea.
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Historical Counterfactual Analysis

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

Grok 4.1 Fast922 words
Technological Implications Immediate Advancements (1920s-1930s): Transistors replace bulky, power-hungry vacuum tubes by mid-1920s. Radios become pocket-sized and cheap by 1925 (vs. 1954 historically), accelerating mass media.
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Ling 3.0 Flash VL (free)2,673 words
If the Transistor Had Been Invented in 1920: A Counterfactual Trajectory to 1980 Preconditions and plausibility By 1920, Karl Braun's cathode ray tube (1897) and Greenleaf Pickard's silicon crystal detector (1906) had already demonstrated semiconductor properties. Quantum theory was nascent (Planck, Bohr).
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Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

Grok 4.1 Fast208 words
Pantry Raid Garlic Tomato Pasta A savory, garlicky one-pan wonder that's ready in under 20 minutes—perfect for when hunger strikes and the fridge is empty! Serves: 2 Prep time: 5 minutes Cook time: 12 minutes Total time: 17 minutes Ingredients (exactly 7 common pantry staples): 200g spaghetti or any pasta (2 handfuls)…
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Ling 3.0 Flash VL (free)234 words
✨ Midnight Stardust Pasta ✨ A silky, golden garlic butter pasta that tastes far more magical than its humble ingredients suggest. ⏱ Time Prep: 5 minutes Cook: 12 minutes Total: 17 minutes 🛒 Ingredients (7 Pantry Staples) Spaghetti (8 oz) Butter (4 tbsp) Olive oil (2 tbsp) Garlic (4 cloves, minced) Parmesan cheese (½…
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Startup Pitch Teardown

Here's a pitch deck summary for a startup called "MindMeld AI": **Slide 1 - Vision:** "We're building the future of human-AI collaboration.…

Grok 4.1 Fast501 words
Solution Claim: "94% accuracy" for decoding neural patterns into text via EEG headband Why it's weak: This is by far the most exaggerated technical claim, as current non-invasive EEG-based brain-computer interfaces (BCIs) for text generation achieve nowhere near 94% accuracy in real-world conditions.
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Ling 3.0 Flash VL (free)907 words
3 Weakest Claims in the MindMeld AI Pitch Deck "Partnership discussions with Apple and Samsung" (Slide 5) Why it's weak: This is a classic credibility vacuum — a claim that's designed to impress but actively damages trust with informed investors.
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Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

Grok 4.1 Fast768 words
LedgerLift (LLLT) Investment Committee Memo Recommendation: LONG 12-Mo PT Range: $55-70 Thesis LedgerLift is a best-in-class mid-market SaaS leader in spend management and AP automation, evidenced by category-leading NRR of 123%, sub-6% logo churn, and 18-month CAC payback.
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Ling 3.0 Flash VL (free)1,203 words
INVESTMENT COMMITTEE MEMO — LEDGERLIFT (LLLT) Classification: Internal — Investment Committee Date: June 2025 Analyst: [Portfolio Team] Recommendation & Thesis Recommendation: SHORT 12-Month Price Target Range: $28–$38 (base-to-bull DCF; downside to $17 in bear) Thesis: LLLT trades at ~$46 (mkt cap ~$8.7B, EV ~$7.3B)…
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Our Verdict
Grok 4.1 Fast
Grok 4.1 Fast
Ling 3.0 Flash VL (free)
Ling 3.0 Flash VL (free)Runner-up

Not enough votes to call it. On the specs, Grok 4.1 Fast has the edge: bigger model tier, major provider backing.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Grok 4.1 Fast
Input
—
Output
—
Ling 3.0 Flash VL (free)
Input
$0.000
Output
$0.000
Where to run it

1 host

Grok 4.1 Fast

No hosts listed on OpenRouter.

Ling 3.0 Flash VL (free)1 host
HostInOutContextUptime
NNovitabf16$0 in·$0 out·262k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Grok 4.1 Fast is developed by xAI while Ling 3.0 Flash VL (free) is developed by inclusionAI. You can compare their actual outputs across 18 challenges on Rival to see how they differ in practice.

It depends on your use case. Grok 4.1 Fast and Ling 3.0 Flash VL (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 18 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of Grok 4.1 Fast and Ling 3.0 Flash VL (free) across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Model pages

Grok 4.1 Fast logo
Grok 4.1 Fast59 outputs, specs and price
Ling 3.0 Flash VL (free) logo
Ling 3.0 Flash VL (free)18 outputs, specs and price
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