| Signal | Gemini 3 Flash Preview | Delta | Grok 4.20 |
|---|---|---|---|
Capabilities | 83 | -17 | |
Benchmarks | 87 | +0 | |
Pricing | 97 | +3 | |
Context window size | 96 | -4 | |
Recency | 100 | -- | |
Output Capacity | 80 | +60 | |
| Overall Result | 3 wins | of 6 | 2 wins |
Score History
87.6
current score
Grok 4.20
right now
88.8
current score
xAI
Gemini 3 Flash Preview saves you $300.00/month
That's $3600.00/year compared to Grok 4.20 at your current usage level of 100K calls/month.
| Metric | Gemini 3 Flash Preview | Grok 4.20 | Winner |
|---|---|---|---|
| Overall Score | 88 | 89 | Grok 4.20 |
| Rank | #17 | #8 | Grok 4.20 |
| Quality Rank | #17 | #8 | Grok 4.20 |
| Adoption Rank | #17 | #8 | Grok 4.20 |
| Parameters | -- | -- | -- |
| Context Window | 1049K | 2000K | Grok 4.20 |
| Pricing | $0.50/$3.00/M | $2.00/$6.00/M | -- |
| Signal Scores | |||
| Capabilities | 83 | 100 | Grok 4.20 |
| Benchmarks | 87 | 86 | Gemini 3 Flash Preview |
| Pricing | 97 | 94 | Gemini 3 Flash Preview |
| Context window size | 96 | 100 | Grok 4.20 |
| Recency | 100 | 100 | Gemini 3 Flash Preview |
| Output Capacity | 80 | 20 | Gemini 3 Flash Preview |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 88/100 (rank #17), placing it in the top 94% of all 290 models tracked.
Scores 89/100 (rank #8), placing it in the top 98% of all 290 models tracked.
With only a 1-point gap, these models are in the same performance tier. The practical difference in output quality is minimal - your choice should depend on pricing, latency requirements, and specific feature needs.
Gemini 3 Flash Preview offers 56% better value per quality point. At 1M tokens/day, you'd spend $52.50/month with Gemini 3 Flash Preview vs $120.00/month with Grok 4.20 - a $67.50 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Higher benchmark score (0/100) indicates stronger performance on coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Faster response time (speed score 0/100) is critical for user-facing chat. Gemini 3 Flash Preview also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (2000K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($3.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (89/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
Gemini 3 Flash Preview and Grok 4.20 are extremely close in overall performance (only 1.2000000000000028 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
Best for Quality
Gemini 3 Flash Preview
Marginally better benchmark scores; both are excellent
Best for Cost
Gemini 3 Flash Preview
56% lower pricing; better value at scale
Best for Reliability
Gemini 3 Flash Preview
Higher uptime and faster response speeds
Best for Prototyping
Gemini 3 Flash Preview
Stronger community support and better developer experience
Best for Production
Gemini 3 Flash Preview
Wider enterprise adoption and proven at scale
by Google
| Capability | Gemini 3 Flash Preview | Grok 4.20 |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Searchdiffers | ||
| Image Output |
xAI
Gemini 3 Flash Preview saves you $6.30/month
That's 58% cheaper than Grok 4.20 at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | Gemini 3 Flash Preview | Grok 4.20 |
|---|---|---|
| Context Window | 1.0M | 2M |
| Max Output Tokens | 65,536 | -- |
| Open Source | No | No |
| Created | Dec 17, 2025 | Mar 31, 2026 |
Grok 4.20 scores 89/100 (rank #8) compared to Gemini 3 Flash Preview's 88/100 (rank #17), giving it a 1-point advantage. Grok 4.20 is the stronger overall choice, though Gemini 3 Flash Preview may excel in specific areas like cost efficiency.
Gemini 3 Flash Preview is ranked #17 and Grok 4.20 is ranked #8 out of 290+ AI models. Rankings use a composite score combining benchmark performance (90%) from MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations, with capabilities and context window as tiebreakers (10%). Scores update hourly.
Gemini 3 Flash Preview is cheaper at $3.00/M output tokens vs Grok 4.20's $6.00/M output tokens - 2.0x more expensive. Input token pricing: Gemini 3 Flash Preview at $0.50/M vs Grok 4.20 at $2.00/M.
Grok 4.20 has a larger context window of 2,000,000 tokens compared to Gemini 3 Flash Preview's 1,048,576 tokens. A larger context window means the model can process longer documents and conversations.