Grok 3 Mini is 85.0% cheaper for input tokens ($0.30 vs. $2.00 per 1M tokens) and $1.20 vs. $8.00 for output tokens (6.7x cost advantage). In terms of operational performance, Grok 3 Mini delivers lower response latency at 150ms TTFT (1000ms faster than OpenAI o3) with 160 vs. 82 tok/s throughput. OpenAI o3 leads coding evaluations at 71.7% SWE-bench Verified vs. 54.0% for Grok 3 Mini and 87.7% 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
Grok 3 Mini
OpenAI o3
Net Delta / Advantage
Input Cost / 1M Tokens
$0.30
$2.00
Grok 3 Mini is 6.7x cheaper
Output Cost / 1M Tokens
$1.20
$8.00
Grok 3 Mini (85.0% lower)
Prompt Cache Read / 1M
$0.080
$0.500
Grok 3 Mini is 6.3x cheaper
Prompt Cache Write / 1M
$0.30
$2.00
Grok 3 Mini is 6.7x cheaper
Context Window (Max Output)
131k (16k out)
205k (100k out)
OpenAI o3 (1.6x larger context)
Avg TTFT Response Latency
150ms
1150ms
Grok 3 Mini (1000ms faster)
Generation Speed (Throughput)
160 tok/s
82 tok/s
Grok 3 Mini (+78 tok/s faster)
SWE-bench Verified (Coding)
54%
71.7%
OpenAI o3 (+17.7% lead)
GPQA Diamond (PhD STEM)
68%
87.7%
OpenAI o3 (+19.7% lead)
MMLU-Pro (Multi-Discipline)
80%
89.8%
OpenAI o3 (+9.8% lead)
MATH-500 (Quantitative Logic)
87%
98.6%
OpenAI o3 (+11.6% lead)
Inference Value Score (IVR)
69.2 / 100
60.6 / 100
Grok 3 Mini (+8.6 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 $2.00/1M input ($8.00/1M output) for OpenAI o3.
Which model has lower TTFT latency and higher tok/s throughput: Grok 3 Mini or OpenAI o3?
Grok 3 Mini delivers faster first-token latency at 150ms TTFT (160 tok/s throughput) compared to 1150ms TTFT (82 tok/s) for OpenAI o3.
How do Grok 3 Mini and OpenAI o3 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Grok 3 Mini scores 54% versus 71.7% for OpenAI o3. On GPQA Diamond graduate-level STEM reasoning, Grok 3 Mini scores 68% versus 87.7% for OpenAI o3 (and 87% vs 98.6% on MATH-500).
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).
When should you choose OpenAI o3?
Choose OpenAI o3 (OpenAI) for algorithmic synthesis, mathematical verification, PhD-level scientific research, and multi-step tool planning — offering a 204k context window, 1150ms TTFT, and $2.00/1M input pricing ($0.500/1M cached reads).
