Grok 4 is 16.7% cheaper for input tokens ($2.50 vs. $3.00 per 1M tokens) and $12.50 vs. $15.00 for output tokens (1.2x cost advantage). In terms of operational performance, Grok 4 delivers lower response latency at 480ms TTFT (140ms faster than Grok 3) with 95 vs. 88 tok/s throughput. Grok 4 leads coding evaluations at 73.2% SWE-bench Verified vs. 65.8% for Grok 3 and 86.2% vs. 84.6% 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 3
Grok 4
Net Delta / Advantage
Input Cost / 1M Tokens
$3.00
$2.50
Grok 4 is 1.2x cheaper
Output Cost / 1M Tokens
$15.00
$12.50
Grok 4 (16.7% lower)
Prompt Cache Read / 1M
$0.750
$0.500
Grok 4 is 1.5x cheaper
Prompt Cache Write / 1M
$3.00
$2.50
Grok 4 is 1.2x cheaper
Context Window (Max Output)
134k (16k out)
262k (66k out)
Grok 4 (2.0x larger context)
Avg TTFT Response Latency
620ms
480ms
Grok 4 (140ms faster)
Generation Speed (Throughput)
88 tok/s
95 tok/s
Grok 4 (+7 tok/s faster)
SWE-bench Verified (Coding)
65.8%
73.2%
Grok 4 (+7.4% lead)
GPQA Diamond (PhD STEM)
84.6%
86.2%
Grok 4 (+1.6% lead)
MMLU-Pro (Multi-Discipline)
80%
89.9%
Grok 4 (+9.9% lead)
MATH-500 (Quantitative Logic)
89.8%
97.6%
Grok 4 (+7.8% lead)
Inference Value Score (IVR)
52.7 / 100
57.6 / 100
Grok 4 (+4.9 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
Choose Grok 3 (xAI) for massive compute foundation model specialized in PhD-level science reasoning, real-time data analysis, and enterprise logic — offering a 134k context window, 620ms TTFT, and $3.00/1M input pricing ($0.750/1M cached reads).
Grok 4 is cheaper at $2.50/1M input tokens ($12.50/1M output) compared to $3.00/1M input ($15.00/1M output) for Grok 3.
Which model has lower TTFT latency and higher tok/s throughput: Grok 3 or Grok 4?
Grok 4 delivers faster first-token latency at 480ms TTFT (95 tok/s throughput) compared to 620ms TTFT (88 tok/s) for Grok 3.
How do Grok 3 and Grok 4 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Grok 3 scores 65.8% versus 73.2% for Grok 4. On GPQA Diamond graduate-level STEM reasoning, Grok 3 scores 84.6% versus 86.2% for Grok 4 (and 89.8% vs 97.6% on MATH-500).
When should you choose Grok 3?
Choose Grok 3 (xAI) for massive compute foundation model specialized in PhD-level science reasoning, real-time data analysis, and enterprise logic — offering a 134k context window, 620ms TTFT, and $3.00/1M input pricing ($0.750/1M 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).
