GPT-5 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-5 delivers lower response latency at 340ms TTFT (140ms faster than Grok 4) with 105 vs. 95 tok/s throughput. GPT-5 leads coding evaluations at 74.9% SWE-bench Verified vs. 73.2% for Grok 4 and 85.4% vs. 86.2% 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-5
Grok 4
Net Delta / Advantage
Input Cost / 1M Tokens
$2.50
$2.50
Identical Pricing
Output Cost / 1M Tokens
$10.00
$12.50
GPT-5 (20.0% lower)
Prompt Cache Read / 1M
$0.625
$0.500
Grok 4 is 1.3x cheaper
Prompt Cache Write / 1M
$2.50
$2.50
Identical Cache Write Pricing
Context Window (Max Output)
410k (128k out)
262k (66k out)
GPT-5 (1.6x larger context)
Avg TTFT Response Latency
340ms
480ms
GPT-5 (140ms faster)
Generation Speed (Throughput)
105 tok/s
95 tok/s
GPT-5 (+10 tok/s faster)
SWE-bench Verified (Coding)
74.9%
73.2%
GPT-5 (+1.7% lead)
GPQA Diamond (PhD STEM)
85.4%
86.2%
Grok 4 (+0.8% lead)
MMLU-Pro (Multi-Discipline)
90.8%
89.9%
GPT-5 (+0.9% lead)
MATH-500 (Quantitative Logic)
98%
97.6%
GPT-5 (+0.4% lead)
Inference Value Score (IVR)
59.2 / 100
57.6 / 100
GPT-5 (+1.6 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-5 and Grok 4 share identical input pricing at $2.50/1M tokens.
Which model has lower TTFT latency and higher tok/s throughput: GPT-5 or Grok 4?
GPT-5 delivers faster first-token latency at 340ms TTFT (105 tok/s throughput) compared to 480ms TTFT (95 tok/s) for Grok 4.
How do GPT-5 and Grok 4 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, GPT-5 scores 74.9% versus 73.2% for Grok 4. On GPQA Diamond graduate-level STEM reasoning, GPT-5 scores 85.4% versus 86.2% for Grok 4 (and 98% vs 97.6% on MATH-500).
When should you choose GPT-5?
Choose GPT-5 (OpenAI) for complex enterprise automation, full-stack software engineering, multimodal agent orchestration, and scientific synthesis — offering a 409k context window, 340ms TTFT, and $2.50/1M input pricing ($0.625/1M 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).
