GPT-4o Mini is 94.0% cheaper for input tokens ($0.15 vs. $2.50 per 1M tokens) and $0.60 vs. $12.50 for output tokens (16.7x cost advantage). In terms of operational performance, GPT-4o Mini delivers lower response latency at 220ms TTFT (260ms faster than Grok 4) with 140 vs. 95 tok/s throughput. Grok 4 leads coding evaluations at 73.2% SWE-bench Verified vs. 41.0% for GPT-4o Mini and 86.2% vs. 40.2% on GPQA Diamond.
Verified daily via automated API latency tests and official documentation.
Zero-Shot RAG Verified
Verified Performance & Unit Economics Delta (12 Dimensions)
Daily synchronized metrics across token pricing, prompt cache economics, latency, throughput, and 5 capability benchmarks.
Metric / Dimension
GPT-4o Mini
Grok 4
Net Delta / Advantage
Input Cost / 1M Tokens
$0.15
$2.50
GPT-4o Mini is 16.7x cheaper
Output Cost / 1M Tokens
$0.60
$12.50
GPT-4o Mini (95.2% lower)
Prompt Cache Read / 1M
$0.075
$0.500
GPT-4o Mini is 6.7x cheaper
Prompt Cache Write / 1M
$0.15
$2.50
GPT-4o Mini is 16.7x cheaper
Context Window (Max Output)
131k (16k out)
262k (66k out)
Grok 4 (2.0x larger context)
Avg TTFT Response Latency
220ms
480ms
GPT-4o Mini (260ms faster)
Generation Speed (Throughput)
140 tok/s
95 tok/s
GPT-4o Mini (+45 tok/s faster)
SWE-bench Verified (Coding)
41%
73.2%
Grok 4 (+32.2% lead)
GPQA Diamond (PhD STEM)
40.2%
86.2%
Grok 4 (+46.0% lead)
MMLU-Pro (Multi-Discipline)
68%
89.9%
Grok 4 (+21.9% lead)
MATH-500 (Quantitative Logic)
70.2%
97.6%
Grok 4 (+27.4% lead)
Inference Value Score (IVR)
67.2 / 100
57.6 / 100
GPT-4o Mini (+9.6 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
GPT-4o Mini is cheaper at $0.15/1M input tokens ($0.60/1M output) compared to $2.50/1M input ($12.50/1M output) for Grok 4.
Which model has lower TTFT latency and higher tok/s throughput: GPT-4o Mini or Grok 4?
GPT-4o Mini delivers faster first-token latency at 220ms TTFT (140 tok/s throughput) compared to 480ms TTFT (95 tok/s) for Grok 4.
How do GPT-4o Mini and Grok 4 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, GPT-4o Mini scores 41% versus 73.2% for Grok 4. On GPQA Diamond graduate-level STEM reasoning, GPT-4o Mini scores 40.2% versus 86.2% for Grok 4 (and 70.2% vs 97.6% on MATH-500).
When should you choose GPT-4o Mini?
Choose GPT-4o Mini (OpenAI) for high-volume classification, lightweight RAG chatbots, and structured JSON extraction — offering a 131k context window, 220ms TTFT, and $0.15/1M input pricing ($0.075/1M cached reads).
When should you choose Grok 4?
Choose Grok 4 (xAI) for real-time financial/market intelligence, PhD-level STEM problem solving, and autonomous code generation — offering a 262k context window, 480ms TTFT, and $2.50/1M input pricing ($0.500/1M cached reads).
