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Gemini 2.5 Flash-Lite

VS
xAI

Grok 4.20

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, Grok 4.20 is the premium intelligence choice, scoring 51.8% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: Gemini 2.5 Flash-Lite is 17.1x cheaper to run and delivers 1.2x faster throughput. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, Gemini 2.5 Flash-Lite offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of Grok 4.20 fully justifies the cost.

Model Specs

Gemini 2.5 Flash-Lite

Benchmarks & Scores

Coding (swe-bench-pro)
N/A
Reasoning (gpqa-diamond)
62.5%

Cost & Performance

Cost (per 1M tokens)17.1x cheaper
$0.17Input: $0.10 | Output: $0.40
Speed1.2x faster
280 tps
Context Window
1M tokens
Model Specs

Grok 4.20

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+)
51.8%
Reasoning (gpqa-diamond)Winner (+27.5%)
90%

Cost & Performance

Cost (per 1M tokens)
$3.00Input: $2.00 | Output: $6.00
Speed
233 tps
Context Window
1M tokens
Read our data collection methodology

Frequently Asked Questions

Gemini 2.5 Flash-Lite is cheaper than Grok 4.20. Gemini 2.5 Flash-Lite has a blended cost of $0.17/1M tokens, which is about 17.1x cheaper than Grok 4.20 at $3.00/1M tokens.

Gemini 2.5 Flash-Lite is faster than Grok 4.20. Gemini 2.5 Flash-Lite generates 280 tokens per second (tps) compared to Grok 4.20 which generates 233 tokens per second.

Grok 4.20 is better for coding tasks. It scores 51.8% on coding evaluations (swe-bench-pro) compared to Gemini 2.5 Flash-Lite which scores N/A.

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