Gemini 2.5 Flash Lite vs Grok 4
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4 by xAI wins on 9 of 14 benchmarks against Gemini 2.5 Flash Lite by Google, which leads on 5. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Grok 4 scores 1430 on Chatbot Arena ELO compared to Gemini 2.5 Flash Lite's 1230, while Grok 4 scores 87.0% on MMLU-Pro compared to Gemini 2.5 Flash Lite's 63.0%.
Coding: In coding, Grok 4 scores 90.0% on HumanEval+ compared to Gemini 2.5 Flash Lite's 70.0%, while Grok 4 scores 72.0% on SWE-bench Verified compared to Gemini 2.5 Flash Lite's 22.0%, while Grok 4 scores 65.0% on LiveCodeBench compared to Gemini 2.5 Flash Lite's 28.0%.
Math: In math, Grok 4 scores 91.0% on MATH compared to Gemini 2.5 Flash Lite's 62.0%, while Grok 4 scores 97.0% on GSM8K compared to Gemini 2.5 Flash Lite's 83.0%.
Reasoning: In reasoning, Grok 4 scores 87.0% on GPQA Diamond compared to Gemini 2.5 Flash Lite's 32.0%, while Grok 4 scores 50.0% on ARC-AGI compared to Gemini 2.5 Flash Lite's 14.0%.
Context: In context, Gemini 2.5 Flash Lite scores 1.0M on Context Length compared to Grok 4's 256K.
Pricing Comparison
Gemini 2.5 Flash Lite costs $0.10/1M input tokens and $0.40/1M output tokens, while Grok 4 costs $3.0/1M input and $15.0/1M output. Gemini 2.5 Flash Lite is the more affordable option for API usage.
Speed Comparison
Gemini 2.5 Flash Lite generates output at 240 tok/s compared to Grok 4's 55 tok/s, and the time to first token is 70 ms for Gemini 2.5 Flash Lite versus 500 ms for Grok 4. Gemini 2.5 Flash Lite delivers faster throughput.
Verdict
For developers prioritizing affordability and speed, Gemini 2.5 Flash Lite has the edge. For those who value coding and general intelligence and math, Grok 4 is the stronger choice.
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Gemini 2.5 Flash Lite vs Grok 4 — FAQ
Which is better, Gemini 2.5 Flash Lite or Grok 4?
Grok 4 wins on more benchmarks overall (9 vs 5). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 2.5 Flash Lite compare to Grok 4 for coding?
Grok 4 is better for coding, scoring 72.0% on SWE-bench Verified compared to 22.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Gemini 2.5 Flash Lite cheaper than Grok 4?
Yes, Gemini 2.5 Flash Lite is cheaper. Gemini 2.5 Flash Lite costs $0.10/1M input and $0.40/1M output tokens. Grok 4 costs $3.0/1M input and $15.0/1M output tokens.
Which is faster, Gemini 2.5 Flash Lite or Grok 4?
Gemini 2.5 Flash Lite is faster, generating output at 240 tok/s compared to 55 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemini 2.5 Flash Lite vs Grok 4 comparison cover?
This comparison covers 14 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, SWE-bench Verified, GPQA Diamond, Output Speed, Time to First Token, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.