Compare/Gemini 3.5 Flash-Lite vs Grok 4.3 (medium)

Gemini 3.5 Flash-LitevsGrok 4.3 (medium)

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

Google

Gemini 3.5 Flash-Lite

Input
$0.3/M
Output
$2.5/M
Speed
600 tok/s
TTFT
9.51s
SpaceXAI

Grok 4.3 (medium)

Input
$1.25/M
Output
$2.5/M
Speed
122 tok/s
TTFT
14.19s

Winner by Category

Cheaper
Gemini 3.5 Flash-Lite
Faster (tok/s)
Gemini 3.5 Flash-Lite
Lower Latency
Gemini 3.5 Flash-Lite
Benchmarks (2-5)
Grok 4.3 (medium)

Pricing Comparison

MetricGemini 3.5 Flash-LiteGrok 4.3 (medium)
Input ($/M tokens)$0.3$1.25
Output ($/M tokens)$2.5$2.5
Cost for 1M input + 100K output tokens:
Gemini 3.5 Flash-Lite$0.55
Grok 4.3 (medium)$1.50

Speed Comparison

Output Speed (tokens/s) — higher is better
Gemini 3.5 Flash-Lite
600 tok/s
Grok 4.3 (medium)
122 tok/s
Time to First Token (seconds) — lower is better
Gemini 3.5 Flash-Lite
9.51s
Grok 4.3 (medium)
14.19s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
36.536.0
Coding Index
49.3
Math Index
GPQA Diamond
83.8%89.0%
MMLU-Pro
LiveCodeBench
AIME 2025
MATH-500
Humanity's Last Exam
17.5%28.1%
SciCode
40.9%44.6%
IFBench
83.3%
TerminalBench
30.3%
Gemini 3.5 Flash-Lite2 wins
5 winsGrok 4.3 (medium)

Frequently Asked Questions

Which is cheaper, Gemini 3.5 Flash-Lite or Grok 4.3 (medium)?

Gemini 3.5 Flash-Lite is cheaper overall. Its blended price (3:1 input/output ratio) is $0.85/M tokens vs $1.56/M for Grok 4.3 (medium).

Which model performs better on benchmarks?

Grok 4.3 (medium) wins 5 out of 12 benchmarks compared to 2 for Gemini 3.5 Flash-Lite. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Gemini 3.5 Flash-Lite generates tokens faster at 600 tok/s vs 122 tok/s. Gemini 3.5 Flash-Lite also has lower time-to-first-token (9.51s vs 14.19s).

When should I use Gemini 3.5 Flash-Lite vs Grok 4.3 (medium)?

Choose based on your priorities: Gemini 3.5 Flash-Lite for lower cost, Grok 4.3 (medium) for stronger benchmark performance, and Gemini 3.5 Flash-Lite for faster generation. For latency-sensitive apps, check the TTFT comparison above.