GPT-4o and Grok 4 share identical input pricing at $2.50 per 1M tokens ($10.00 vs. $12.50 output). In terms of operational performance, GPT-4o delivers lower response latency at 280ms TTFT (200ms faster than Grok 4) with 100 vs. 95 tok/s throughput. Grok 4 leads coding evaluations at 73.2% SWE-bench Verified vs. 48.0% for GPT-4o and 86.2% vs. 53.6% 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
GPT-4o
Grok 4
Net Delta / Advantage
Input Cost / 1M Tokens
$2.50
$2.50
Identical Pricing
Output Cost / 1M Tokens
$10.00
$12.50
GPT-4o (20.0% lower)
Prompt Cache Read / 1M
$1.250
$0.500
Grok 4 is 2.5x cheaper
Prompt Cache Write / 1M
$2.50
$2.50
Identical Cache Write Pricing
Context Window (Max Output)
131k (16k out)
262k (66k out)
Grok 4 (2.0x larger context)
Avg TTFT Response Latency
280ms
480ms
GPT-4o (200ms faster)
Generation Speed (Throughput)
100 tok/s
95 tok/s
GPT-4o (+5 tok/s faster)
SWE-bench Verified (Coding)
48%
73.2%
Grok 4 (+25.2% lead)
GPQA Diamond (PhD STEM)
53.6%
86.2%
Grok 4 (+32.6% lead)
MMLU-Pro (Multi-Discipline)
75.9%
89.9%
Grok 4 (+14.0% lead)
MATH-500 (Quantitative Logic)
76.6%
97.6%
Grok 4 (+21.0% lead)
Inference Value Score (IVR)
47.6 / 100
57.6 / 100
Grok 4 (+10 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
Both GPT-4o and Grok 4 share identical input pricing at $2.50/1M tokens.
Which model has lower TTFT latency and higher tok/s throughput: GPT-4o or Grok 4?
GPT-4o delivers faster first-token latency at 280ms TTFT (100 tok/s throughput) compared to 480ms TTFT (95 tok/s) for Grok 4.
How do GPT-4o and Grok 4 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, GPT-4o scores 48% versus 73.2% for Grok 4. On GPQA Diamond graduate-level STEM reasoning, GPT-4o scores 53.6% versus 86.2% for Grok 4 (and 76.6% vs 97.6% on MATH-500).
When should you choose GPT-4o?
Choose GPT-4o (OpenAI) for general enterprise assistants, multimodal customer support, and structured JSON output pipelines — offering a 131k context window, 280ms TTFT, and $2.50/1M input pricing ($1.250/1M 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).
