| Signal | Grok 4 Fast | Delta | Mistral Small 4 |
|---|---|---|---|
Capabilities | 100 | +17 | |
Benchmarks | 70 | +70 | |
Pricing | 1 | 0 | |
Context window size | 100 | +14 | |
Recency | 100 | -- | |
Output Capacity | 75 | +55 | |
| Overall Result | 4 wins | of 6 | 1 wins |
26
days ranked higher
2
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2
days ranked higher
xAI
Mistral AI
| Metric | Grok 4 Fast | Mistral Small 4 | Winner |
|---|---|---|---|
| Overall Score | 84 | 79 | Grok 4 Fast |
| Rank | #49 | #76 | Grok 4 Fast |
| Quality Rank | #49 | #76 | Grok 4 Fast |
| Adoption Rank | #49 | #76 | Grok 4 Fast |
| Parameters | -- | -- | -- |
| Context Window | 2000K | 262K | Grok 4 Fast |
| Pricing | $0.20/$0.50/M | $0.15/$0.60/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 83 | Grok 4 Fast |
| Benchmarks | 70 | -- | Grok 4 Fast |
| Pricing | 1 | 1 | Mistral Small 4 |
| Context window size | 100 | 86 | Grok 4 Fast |
| Recency | 100 | 100 | Grok 4 Fast |
| Output Capacity | 75 | 20 | Grok 4 Fast |
Our composite score (0–100) combines six weighted signals: benchmark performance (25%), pricing efficiency (25%), context window size (15%), model recency (15%), output capacity (10%), and capability versatility (10%). Here's what the scores mean for these two models:
Scores 84/100 (rank #49), placing it in the top 83% of all 290 models tracked.
Scores 79/100 (rank #76), placing it in the top 74% of all 290 models tracked.
With only a 4-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.
Grok 4 Fast offers 7% better value per quality point. At 1M tokens/day, you'd spend $10.50/month with Grok 4 Fast vs $11.25/month with Mistral Small 4 - a $0.75 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. Grok 4 Fast 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 ($0.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (84/100) 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
Grok 4 Fast has a moderate advantage with a 4.099999999999994-point lead in composite score. It wins on more signal dimensions, but Mistral Small 4 has specific strengths that could make it the better choice for certain workflows.
Best for Quality
Grok 4 Fast
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4 Fast
7% lower pricing; better value at scale
Best for Reliability
Grok 4 Fast
Higher uptime and faster response speeds
Best for Prototyping
Grok 4 Fast
Stronger community support and better developer experience
Best for Production
Grok 4 Fast
Wider enterprise adoption and proven at scale
by xAI
| Capability | Grok 4 Fast | Mistral Small 4 |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Searchdiffers | ||
| Image Output |
xAI
Mistral AI
Grok 4 Fast saves you $0.0300/month
That's 3% cheaper than Mistral Small 4 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 | Grok 4 Fast | Mistral Small 4 |
|---|---|---|
| Context Window | 2M | 262K |
| Max Output Tokens | 30,000 | -- |
| Open Source | No | Yes |
| Created | Sep 19, 2025 | Mar 16, 2026 |
Grok 4 Fast scores 84/100 (rank #49) compared to Mistral Small 4's 79/100 (rank #76), giving it a 4-point advantage. Grok 4 Fast is the stronger overall choice, though Mistral Small 4 may excel in specific areas like certain benchmarks.
Grok 4 Fast is ranked #49 and Mistral Small 4 is ranked #76 out of 290+ AI models. Rankings use a composite score combining benchmark performance (25%), pricing (25%), context window (15%), recency (15%), output capacity (10%), and versatility (10%). Scores update hourly.
Grok 4 Fast is cheaper at $0.50/M output tokens vs Mistral Small 4's $0.60/M output tokens - 1.2x more expensive. Input token pricing: Grok 4 Fast at $0.20/M vs Mistral Small 4 at $0.15/M.
Grok 4 Fast has a larger context window of 2,000,000 tokens compared to Mistral Small 4's 262,144 tokens. A larger context window means the model can process longer documents and conversations.