Which model is better: Gemini 3.5 Flash-Lite or Grok 4?
Gemini 3.5 Flash-Lite is 97.0% cheaper for input tokens ($0.07 vs. $2.50 per 1M tokens) and $0.30 vs. $12.50 for output tokens (33.3x cost advantage). In terms of operational performance, Gemini 3.5 Flash-Lite delivers lower response latency at 78ms TTFT (402ms faster than Grok 4) with 265 vs. 95 tok/s throughput. Grok 4 leads coding evaluations at 73.2% SWE-bench Verified vs. 55.4% for Gemini 3.5 Flash-Lite and 86.2% vs. 68.4% 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 3.5 Flash-Lite
Grok 4
Net Delta / Advantage
Input Cost / 1M Tokens
$0.07
$2.50
Gemini 3.5 Flash-Lite is 33.3x cheaper
Output Cost / 1M Tokens
$0.30
$12.50
Gemini 3.5 Flash-Lite (97.6% lower)
Prompt Cache Read / 1M
$0.015
$0.500
Gemini 3.5 Flash-Lite is 33.3x cheaper
Prompt Cache Write / 1M
$0.07
$2.50
Gemini 3.5 Flash-Lite is 33.3x cheaper
Context Window (Max Output)
1,049k (33k out)
262k (66k out)
Gemini 3.5 Flash-Lite (4.0x larger context)
Avg TTFT Response Latency
78ms
480ms
Gemini 3.5 Flash-Lite (402ms faster)
Generation Speed (Throughput)
265 tok/s
95 tok/s
Gemini 3.5 Flash-Lite (+170 tok/s faster)
SWE-bench Verified (Coding)
55.4%
73.2%
Grok 4 (+17.8% lead)
GPQA Diamond (PhD STEM)
68.4%
86.2%
Grok 4 (+17.8% lead)
MMLU-Pro (Multi-Discipline)
80.1%
89.9%
Grok 4 (+9.8% lead)
MATH-500 (Quantitative Logic)
90.2%
97.6%
Grok 4 (+7.4% lead)
Inference Value Score (IVR)
81.5 / 100
57.6 / 100
Gemini 3.5 Flash-Lite (+23.9 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
Which is cheaper: Gemini 3.5 Flash-Lite or Grok 4?
Gemini 3.5 Flash-Lite is cheaper at $0.075/1M input tokens ($0.30/1M 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 3.5 Flash-Lite or Grok 4?
Gemini 3.5 Flash-Lite delivers faster first-token latency at 78ms TTFT (265 tok/s throughput) compared to 480ms TTFT (95 tok/s) for Grok 4.
How do Gemini 3.5 Flash-Lite and Grok 4 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Gemini 3.5 Flash-Lite scores 55.4% versus 73.2% for Grok 4. On GPQA Diamond graduate-level STEM reasoning, Gemini 3.5 Flash-Lite scores 68.4% versus 86.2% for Grok 4 (and 90.2% vs 97.6% on MATH-500).
When should you choose Gemini 3.5 Flash-Lite?
Choose Gemini 3.5 Flash-Lite (Google) for high-frequency data pipelines, real-time routing, large-scale document tagging, and ultra-low-cost conversational assistants — offering a 1,048k context window, 78ms TTFT, and $0.07/1M input pricing ($0.015/1M 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).
