Which model is better: Gemini 2.5 Flash or Grok 4?
Gemini 2.5 Flash is 88.0% cheaper for input tokens ($0.30 vs. $2.50 per 1M tokens) and $2.50 vs. $12.50 for output tokens (8.3x cost advantage). In terms of operational performance, Gemini 2.5 Flash delivers lower response latency at 110ms TTFT (370ms faster than Grok 4) with 180 vs. 95 tok/s throughput. Grok 4 leads coding evaluations at 73.2% SWE-bench Verified vs. 58.0% for Gemini 2.5 Flash and 86.2% vs. 70.5% 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
Gemini 2.5 Flash
Grok 4
Net Delta / Advantage
Input Cost / 1M Tokens
$0.30
$2.50
Gemini 2.5 Flash is 8.3x cheaper
Output Cost / 1M Tokens
$2.50
$12.50
Gemini 2.5 Flash (80.0% lower)
Prompt Cache Read / 1M
$0.030
$0.500
Gemini 2.5 Flash is 16.7x cheaper
Prompt Cache Write / 1M
$0.30
$2.50
Gemini 2.5 Flash is 8.3x cheaper
Context Window (Max Output)
1,049k (66k out)
262k (66k out)
Gemini 2.5 Flash (4.0x larger context)
Avg TTFT Response Latency
110ms
480ms
Gemini 2.5 Flash (370ms faster)
Generation Speed (Throughput)
180 tok/s
95 tok/s
Gemini 2.5 Flash (+85 tok/s faster)
SWE-bench Verified (Coding)
58%
73.2%
Grok 4 (+15.2% lead)
GPQA Diamond (PhD STEM)
70.5%
86.2%
Grok 4 (+15.7% lead)
MMLU-Pro (Multi-Discipline)
82%
89.9%
Grok 4 (+7.9% lead)
MATH-500 (Quantitative Logic)
89%
97.6%
Grok 4 (+8.6% lead)
Inference Value Score (IVR)
66.6 / 100
57.6 / 100
Gemini 2.5 Flash (+9 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
Gemini 2.5 Flash is cheaper at $0.30/1M input tokens ($2.50/1M output) compared to $2.50/1M input ($12.50/1M output) for Grok 4.
Which model has lower TTFT latency and higher tok/s throughput: Gemini 2.5 Flash or Grok 4?
Gemini 2.5 Flash delivers faster first-token latency at 110ms TTFT (180 tok/s throughput) compared to 480ms TTFT (95 tok/s) for Grok 4.
How do Gemini 2.5 Flash and Grok 4 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Gemini 2.5 Flash scores 58% versus 73.2% for Grok 4. On GPQA Diamond graduate-level STEM reasoning, Gemini 2.5 Flash scores 70.5% versus 86.2% for Grok 4 (and 89% vs 97.6% on MATH-500).
When should you choose Gemini 2.5 Flash?
Choose Gemini 2.5 Flash (Google) for cost-efficient 1M-context summarization, multimodal extraction, and interactive assistants — offering a 1,048k context window, 110ms TTFT, and $0.30/1M input pricing ($0.030/1M 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).
