Grok 3 Mini is 88.0% cheaper for input tokens ($0.30 vs. $2.50 per 1M tokens) and $1.20 vs. $10.00 for output tokens (8.3x cost advantage). In terms of operational performance, Grok 3 Mini delivers lower response latency at 150ms TTFT (190ms faster than GPT-5) with 160 vs. 105 tok/s throughput. GPT-5 leads coding evaluations at 74.9% SWE-bench Verified vs. 54.0% for Grok 3 Mini and 85.4% vs. 68.0% 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 3 Mini
Net Delta / Advantage
Input Cost / 1M Tokens
$2.50
$0.30
Grok 3 Mini is 8.3x cheaper
Output Cost / 1M Tokens
$10.00
$1.20
Grok 3 Mini (88.0% lower)
Prompt Cache Read / 1M
$0.625
$0.080
Grok 3 Mini is 7.8x cheaper
Prompt Cache Write / 1M
$2.50
$0.30
Grok 3 Mini is 8.3x cheaper
Context Window (Max Output)
410k (128k out)
131k (16k out)
GPT-5 (3.1x larger context)
Avg TTFT Response Latency
340ms
150ms
Grok 3 Mini (190ms faster)
Generation Speed (Throughput)
105 tok/s
160 tok/s
Grok 3 Mini (+55 tok/s faster)
SWE-bench Verified (Coding)
74.9%
54%
GPT-5 (+20.9% lead)
GPQA Diamond (PhD STEM)
85.4%
68%
GPT-5 (+17.4% lead)
MMLU-Pro (Multi-Discipline)
90.8%
80%
GPT-5 (+10.8% lead)
MATH-500 (Quantitative Logic)
98%
87%
GPT-5 (+11.0% lead)
Inference Value Score (IVR)
59.2 / 100
69.2 / 100
Grok 3 Mini (+10 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 Mini (xAI) for high-speed reasoning model providing rapid answers and code generation with chain-of-thought capabilities at edge pricing — offering a 131k context window, 150ms TTFT, and $0.30/1M input pricing ($0.080/1M cached reads).
Grok 3 Mini is cheaper at $0.30/1M input tokens ($1.20/1M output) compared to $2.50/1M input ($10.00/1M output) for GPT-5.
Which model has lower TTFT latency and higher tok/s throughput: GPT-5 or Grok 3 Mini?
Grok 3 Mini delivers faster first-token latency at 150ms TTFT (160 tok/s throughput) compared to 340ms TTFT (105 tok/s) for GPT-5.
How do GPT-5 and Grok 3 Mini compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, GPT-5 scores 74.9% versus 54% for Grok 3 Mini. On GPQA Diamond graduate-level STEM reasoning, GPT-5 scores 85.4% versus 68% for Grok 3 Mini (and 98% vs 87% 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 3 Mini?
Choose Grok 3 Mini (xAI) for high-speed reasoning model providing rapid answers and code generation with chain-of-thought capabilities at edge pricing — offering a 131k context window, 150ms TTFT, and $0.30/1M input pricing ($0.080/1M cached reads).
