| Signal | GPT-4o (extended) | Delta | Grok 4.1 Fast |
|---|---|---|---|
Capabilities | 67 | -33 | |
Pricing | 18 | +18 | |
Context window size | 81 | -19 | |
Recency | 9 | -91 | |
Output Capacity | 80 | +6 | |
Benchmarks | 0 | -76 | |
| Overall Result | 2 wins | of 6 | 4 wins |
0
days ranked higher
0
days
30
days ranked higher
OpenAI
xAI
Grok 4.1 Fast saves you $1455.00/month
That's $17460.00/year compared to GPT-4o (extended) at your current usage level of 100K calls/month.
| Metric | GPT-4o (extended) | Grok 4.1 Fast | Winner |
|---|---|---|---|
| Overall Score | 54 | 87 | Grok 4.1 Fast |
| Rank | #250 | #16 | Grok 4.1 Fast |
| Quality Rank | #250 | #16 | Grok 4.1 Fast |
| Adoption Rank | #250 | #16 | Grok 4.1 Fast |
| Parameters | -- | -- | -- |
| Context Window | 128K | 2000K | Grok 4.1 Fast |
| Pricing | $6.00/$18.00/M | $0.20/$0.50/M | -- |
| Signal Scores | |||
| Capabilities | 67 | 100 | Grok 4.1 Fast |
| Pricing | 18 | 1 | GPT-4o (extended) |
| Context window size | 81 | 100 | Grok 4.1 Fast |
| Recency | 9 | 100 | Grok 4.1 Fast |
| Output Capacity | 80 | 75 | GPT-4o (extended) |
| Benchmarks | -- | 76 | Grok 4.1 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 54/100 (rank #250), placing it in the top 14% of all 290 models tracked.
Scores 87/100 (rank #16), placing it in the top 95% of all 290 models tracked.
Grok 4.1 Fast has a 33-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Grok 4.1 Fast offers 97% better value per quality point. At 1M tokens/day, you'd spend $10.50/month with Grok 4.1 Fast vs $360.00/month with GPT-4o (extended) - a $349.50 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. Grok 4.1 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 (87/100) 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 4.1 Fast clearly outperforms GPT-4o (extended) with a significant 32.50000000000001-point lead. For most general use cases, Grok 4.1 Fast is the stronger choice. However, GPT-4o (extended) may still excel in niche scenarios.
Best for Quality
GPT-4o (extended)
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4.1 Fast
97% lower pricing; better value at scale
Best for Reliability
GPT-4o (extended)
Higher uptime and faster response speeds
Best for Prototyping
GPT-4o (extended)
Stronger community support and better developer experience
Best for Production
GPT-4o (extended)
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | GPT-4o (extended) | Grok 4.1 Fast |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoningdiffers | ||
| Web Searchdiffers | ||
| Image Output |
OpenAI
xAI
Grok 4.1 Fast saves you $31.44/month
That's 97% cheaper than GPT-4o (extended) 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 | GPT-4o (extended) | Grok 4.1 Fast |
|---|---|---|
| Context Window | 128K | 2M |
| Max Output Tokens | 64,000 | 30,000 |
| Open Source | No | No |
| Created | May 13, 2024 | Nov 19, 2025 |
Grok 4.1 Fast scores 87/100 (rank #16) compared to GPT-4o (extended)'s 54/100 (rank #250), giving it a 33-point advantage. Grok 4.1 Fast is the stronger overall choice, though GPT-4o (extended) may excel in specific areas like certain benchmarks.
GPT-4o (extended) is ranked #250 and Grok 4.1 Fast is ranked #16 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 4.1 Fast is cheaper at $0.50/M output tokens vs GPT-4o (extended)'s $18.00/M output tokens - 36.0x more expensive. Input token pricing: GPT-4o (extended) at $6.00/M vs Grok 4.1 Fast at $0.20/M.
Grok 4.1 Fast has a larger context window of 2,000,000 tokens compared to GPT-4o (extended)'s 128,000 tokens. A larger context window means the model can process longer documents and conversations.