Gemini 3.1 Pro
Gemini 3.5 Flash
Decision Recommendation
⚖️ Editorial Verdict: In our analysis, Gemini 3.1 Pro is the premium intelligence choice, scoring 0.9% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: Gemini 3.5 Flash is 1.3x cheaper to run and delivers 2.6x faster throughput. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, Gemini 3.5 Flash offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of Gemini 3.1 Pro fully justifies the cost.
Gemini 3.1 Pro
Benchmarks & Scores
Cost & Performance
Gemini 3.5 Flash
Benchmarks & Scores
Cost & Performance
Frequently Asked Questions
Gemini 3.5 Flash is cheaper than Gemini 3.1 Pro. Gemini 3.5 Flash has a blended cost of $3.38/1M tokens, which is about 1.3x cheaper than Gemini 3.1 Pro at $4.50/1M tokens.
Gemini 3.5 Flash is faster than Gemini 3.1 Pro. Gemini 3.5 Flash generates 280 tokens per second (tps) compared to Gemini 3.1 Pro which generates 109 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 3.1 Pro which scores 54.2%.
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