token.app › Compare › Gemini 3.1 Pro Preview vs Gemini 3.7 Flash

Gemini 3.1 Pro Preview vs Gemini 3.7 Flash

Gemini 3.7 Flash leads on 4 of 4 shared benchmarks. Gemini 3.7 Flash is 3.0× cheaper per token on a blended 3:1 basis.

Head to head
Blended price uses a 3:1 input:output mix
Gemini 3.1 Pro PreviewGemini 3.7 Flash
ProviderGoogleGoogle
Input $/1M$2.00$0.750
Output $/1M$12.00$3.75
Blended $/1M$4.50$1.50
Context window1.0M1.0M
Max output66K66K
ReleasedFeb 2026Aug 2026
LicenceProprietaryProprietary
GPQA Diamond 94.4% 94.8%
FrontierMath T1–3 59.6% 71.6%
FrontierMath T4 26.8% 36.6%
OTIS Mock AIME 95.6% 97.2%
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose Gemini 3.1 Pro Preview if…
  • No clear advantage on the data we hold.
Choose Gemini 3.7 Flash if…
  • Costs less per token — $1.50 vs $4.50 blended
  • Higher GPQA Diamond (94.8% vs 94.4%)
  • Higher FrontierMath T1–3 (71.6% vs 59.6%)
  • Higher FrontierMath T4 (36.6% vs 26.8%)
  • Higher OTIS Mock AIME (97.2% vs 95.6%)
  • Newer model (released Aug 2026)
FAQ
Which is better, Gemini 3.1 Pro Preview or Gemini 3.7 Flash?
Across the 4 benchmarks both models have independently-run scores for, Gemini 3.1 Pro Preview leads on 0 and Gemini 3.7 Flash leads on 4. Benchmarks are one input — price and context window are on this page too.
Is Gemini 3.1 Pro Preview cheaper than Gemini 3.7 Flash?
Gemini 3.7 Flash is cheaper: $1.50 versus $4.50 per million tokens blended at 3:1 input:output. Input alone: $2.00 vs $0.750. Output alone: $12.00 vs $3.75.
What context windows do Gemini 3.1 Pro Preview and Gemini 3.7 Flash have?
Gemini 3.1 Pro Preview: 1,048,576 tokens. Gemini 3.7 Flash: 1,048,576 tokens.
Who makes Gemini 3.1 Pro Preview and Gemini 3.7 Flash?
Gemini 3.1 Pro Preview is made by Google. Gemini 3.7 Flash is made by Google.
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