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Google

Gemini 2.5 Flash-Lite

VS
Google

Gemini 3.5 Flash

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

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, Gemini 3.5 Flash is the premium intelligence choice, scoring 55.1% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: Gemini 2.5 Flash-Lite is 19.3x cheaper to run. 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 Gemini 3.5 Flash 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)19.3x cheaper
$0.17Input: $0.10 | Output: $0.40
Speed
280 tps
Context Window
1M tokens
Model Specs

Gemini 3.5 Flash

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+)
55.1%
Reasoning (gpqa-diamond)Winner (+29.7%)
92.2%

Cost & Performance

Cost (per 1M tokens)
$3.38Input: $1.50 | Output: $9.00
Speed
280 tps
Context Window
1M tokens
Read our data collection methodology

Frequently Asked Questions

Gemini 2.5 Flash-Lite is cheaper than Gemini 3.5 Flash. Gemini 2.5 Flash-Lite has a blended cost of $0.17/1M tokens, which is about 19.3x cheaper than Gemini 3.5 Flash at $3.38/1M tokens.

Both models have the same generation speed, yielding 280 tokens per second.

Gemini 3.5 Flash is better for coding tasks. It scores 55.1% on coding evaluations (swe-bench-pro) compared to Gemini 2.5 Flash-Lite which scores N/A.

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