| Signal | Grok 4 Fast | Delta | o4 Mini High |
|---|---|---|---|
Capabilities | 100 | -- | |
Benchmarks | 70 | 0 | |
Pricing | 100 | +4 | |
Context window size | 100 | +16 | |
Recency | 90 | +28 | |
Output Capacity | 75 | -9 | |
| Overall Result | 3 wins | of 6 | 2 wins |
Score History
72.5
current score
Grok 4 Fast
right now
72.1
current score
xAI
OpenAI
Grok 4 Fast saves you $285.00/month
That's $3420.00/year compared to o4 Mini High at your current usage level of 100K calls/month.
| Metric | Grok 4 Fast | o4 Mini High | Winner |
|---|---|---|---|
| Overall Score | 73 | 72 | Grok 4 Fast |
| Rank | #81 | #83 | Grok 4 Fast |
| Quality Rank | #81 | #83 | Grok 4 Fast |
| Adoption Rank | #81 | #83 | Grok 4 Fast |
| Parameters | -- | -- | -- |
| Context Window | 2000K | 200K | Grok 4 Fast |
| Pricing | $0.20/$0.50/M | $1.10/$4.40/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Grok 4 Fast |
| Benchmarks | 70 | 70 | o4 Mini High |
| Pricing | 100 | 96 | Grok 4 Fast |
| Context window size | 100 | 84 | Grok 4 Fast |
| Recency | 90 | 62 | Grok 4 Fast |
| Output Capacity | 75 | 83 | o4 Mini High |
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 73/100 (rank #81), placing it in the top 72% of all 290 models tracked.
Scores 72/100 (rank #83), placing it in the top 72% of all 290 models tracked.
With only a 0-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 87% better value per quality point. At 1M tokens/day, you'd spend $10.50/month with Grok 4 Fast vs $82.50/month with o4 Mini High - a $72.00 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
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. 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 (73/100) 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 and o4 Mini High are extremely close in overall performance (only 0.4000000000000057 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
Best for Quality
Grok 4 Fast
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4 Fast
87% 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 | o4 Mini High |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
xAI
OpenAI
Grok 4 Fast saves you $6.30/month
That's 87% cheaper than o4 Mini High 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 | o4 Mini High |
|---|---|---|
| Context Window | 2M | 200K |
| Max Output Tokens | 30,000 | 100,000 |
| Open Source | No | No |
| Created | Sep 19, 2025 | Apr 16, 2025 |