OpenAI o4-mini is 56.0% cheaper for input tokens ($1.10 vs. $2.50 per 1M tokens) and $4.40 vs. $12.50 for output tokens (2.3x cost advantage). In terms of operational performance, Grok 4 delivers lower response latency at 480ms TTFT (200ms faster than OpenAI o4-mini) with 95 vs. 125 tok/s throughput. Grok 4 leads coding evaluations at 73.2% SWE-bench Verified vs. 68.1% for OpenAI o4-mini and 86.2% vs. 81.4% 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
Grok 4
OpenAI o4-mini
Net Delta / Advantage
Input Cost / 1M Tokens
$2.50
$1.10
OpenAI o4-mini is 2.3x cheaper
Output Cost / 1M Tokens
$12.50
$4.40
OpenAI o4-mini (64.8% lower)
Prompt Cache Read / 1M
$0.500
$0.275
OpenAI o4-mini is 1.8x cheaper
Prompt Cache Write / 1M
$2.50
$1.10
OpenAI o4-mini is 2.3x cheaper
Context Window (Max Output)
262k (66k out)
205k (100k out)
Grok 4 (1.3x larger context)
Avg TTFT Response Latency
480ms
680ms
Grok 4 (200ms faster)
Generation Speed (Throughput)
95 tok/s
125 tok/s
OpenAI o4-mini (+30 tok/s faster)
SWE-bench Verified (Coding)
73.2%
68.1%
Grok 4 (+5.1% lead)
GPQA Diamond (PhD STEM)
86.2%
81.4%
Grok 4 (+4.8% lead)
MMLU-Pro (Multi-Discipline)
89.9%
85.6%
Grok 4 (+4.3% lead)
MATH-500 (Quantitative Logic)
97.6%
97.8%
OpenAI o4-mini (+0.2% lead)
Inference Value Score (IVR)
57.6 / 100
63.7 / 100
OpenAI o4-mini (+6.1 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
OpenAI o4-mini is cheaper at $1.10/1M input tokens ($4.40/1M 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: Grok 4 or OpenAI o4-mini?
Grok 4 delivers faster first-token latency at 480ms TTFT (95 tok/s throughput) compared to 680ms TTFT (125 tok/s) for OpenAI o4-mini.
How do Grok 4 and OpenAI o4-mini compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Grok 4 scores 73.2% versus 68.1% for OpenAI o4-mini. On GPQA Diamond graduate-level STEM reasoning, Grok 4 scores 86.2% versus 81.4% for OpenAI o4-mini (and 97.6% vs 97.8% on MATH-500).
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).
When should you choose OpenAI o4-mini?
Choose OpenAI o4-mini (OpenAI) for automated PR review, high-volume agentic coding loops, SQL/data analysis, and visual document reasoning — offering a 204k context window, 680ms TTFT, and $1.10/1M input pricing ($0.275/1M cached reads).
