| Signal | GPT-3.5 Turbo Instruct | Delta | Grok 4 Fast |
|---|---|---|---|
Capabilities | 33 | -67 | |
Pricing | 2 | +2 | |
Context window size | 57 | -43 | |
Recency | 0 | -99 | |
Output Capacity | 60 | -14 | |
Benchmarks | 0 | -70 | |
| Overall Result | 1 wins | of 6 | 5 wins |
0
days ranked higher
0
days
30
days ranked higher
OpenAI
xAI
Grok 4 Fast saves you $205.00/month
That's $2460.00/year compared to GPT-3.5 Turbo Instruct at your current usage level of 100K calls/month.
| Metric | GPT-3.5 Turbo Instruct | Grok 4 Fast | Winner |
|---|---|---|---|
| Overall Score | 32 | 83 | Grok 4 Fast |
| Rank | #302 | #52 | Grok 4 Fast |
| Quality Rank | #302 | #52 | Grok 4 Fast |
| Adoption Rank | #302 | #52 | Grok 4 Fast |
| Parameters | -- | -- | -- |
| Context Window | 4K | 2000K | Grok 4 Fast |
| Pricing | $1.50/$2.00/M | $0.20/$0.50/M | -- |
| Signal Scores | |||
| Capabilities | 33 | 100 | Grok 4 Fast |
| Pricing | 2 | 1 | GPT-3.5 Turbo Instruct |
| Context window size | 57 | 100 | Grok 4 Fast |
| Recency | 0 | 99 | Grok 4 Fast |
| Output Capacity | 60 | 75 | Grok 4 Fast |
| Benchmarks | -- | 70 | 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 32/100 (rank #302), placing it in the top -4% of all 290 models tracked.
Scores 83/100 (rank #52), placing it in the top 82% of all 290 models tracked.
Grok 4 Fast has a 51-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Grok 4 Fast offers 80% better value per quality point. At 1M tokens/day, you'd spend $10.50/month with Grok 4 Fast vs $52.50/month with GPT-3.5 Turbo Instruct - a $42.00 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
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 (83/100) 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 clearly outperforms GPT-3.5 Turbo Instruct with a significant 51.2-point lead. For most general use cases, Grok 4 Fast is the stronger choice. However, GPT-3.5 Turbo Instruct may still excel in niche scenarios.
Best for Quality
GPT-3.5 Turbo Instruct
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4 Fast
80% lower pricing; better value at scale
Best for Reliability
GPT-3.5 Turbo Instruct
Higher uptime and faster response speeds
Best for Prototyping
GPT-3.5 Turbo Instruct
Stronger community support and better developer experience
Best for Production
GPT-3.5 Turbo Instruct
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | GPT-3.5 Turbo Instruct | Grok 4 Fast |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Callingdiffers | ||
| Streaming | ||
| JSON Mode | ||
| Reasoningdiffers | ||
| Web Searchdiffers | ||
| Image Output |
OpenAI
xAI
Grok 4 Fast saves you $4.14/month
That's 81% cheaper than GPT-3.5 Turbo Instruct 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-3.5 Turbo Instruct | Grok 4 Fast |
|---|---|---|
| Context Window | 4K | 2M |
| Max Output Tokens | 4,096 | 30,000 |
| Open Source | No | No |
| Created | Sep 28, 2023 | Sep 19, 2025 |
Grok 4 Fast scores 83/100 (rank #52) compared to GPT-3.5 Turbo Instruct's 32/100 (rank #302), giving it a 51-point advantage. Grok 4 Fast is the stronger overall choice, though GPT-3.5 Turbo Instruct may excel in specific areas like certain benchmarks.
GPT-3.5 Turbo Instruct is ranked #302 and Grok 4 Fast is ranked #52 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 GPT-3.5 Turbo Instruct's $2.00/M output tokens - 4.0x more expensive. Input token pricing: GPT-3.5 Turbo Instruct at $1.50/M vs Grok 4 Fast at $0.20/M.
Grok 4 Fast has a larger context window of 2,000,000 tokens compared to GPT-3.5 Turbo Instruct's 4,095 tokens. A larger context window means the model can process longer documents and conversations.