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Google

Gemini 3 Flash

VS
Google

Gemini 3.1 Pro

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

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, Gemini 3.1 Pro is the premium intelligence choice, scoring 19.6% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: Gemini 3 Flash is 4.0x cheaper to run and delivers 1.5x faster throughput. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, Gemini 3 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.

Model Specs

Gemini 3 Flash

Benchmarks & Scores

Coding (swe-bench-pro)
34.6%
Reasoning (gpqa-diamond)
90.4%

Cost & Performance

Cost (per 1M tokens)4.0x cheaper
$1.13Input: $0.50 | Output: $3.00
Speed1.5x faster
159 tps
Context Window
1M tokens
Model Specs

Gemini 3.1 Pro

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+19.6%)
54.2%
Reasoning (gpqa-diamond)Winner (+3.9%)
94.3%

Cost & Performance

Cost (per 1M tokens)
$4.50Input: $2.00 | Output: $12.00
Speed
109 tps
Context Window
1M tokens
Read our data collection methodology

Frequently Asked Questions

Gemini 3 Flash is cheaper than Gemini 3.1 Pro. Gemini 3 Flash has a blended cost of $1.13/1M tokens, which is about 4.0x cheaper than Gemini 3.1 Pro at $4.50/1M tokens.

Gemini 3 Flash is faster than Gemini 3.1 Pro. Gemini 3 Flash generates 159 tokens per second (tps) compared to Gemini 3.1 Pro which generates 109 tokens per second.

Gemini 3.1 Pro is better for coding tasks. It scores 54.2% on coding evaluations (swe-bench-pro) compared to Gemini 3 Flash which scores 34.6%.

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