token.app › Compare › Gemini 3.1 Pro Preview vs GPT-5.6 Terra

Gemini 3.1 Pro Preview vs GPT-5.6 Terra

GPT-5.6 Terra leads on 3 of 5 shared benchmarks. GPT-5.6 Terra is 2.0× cheaper per token on a blended 3:1 basis. GPT-5.6 Terra accepts the larger context window (1.1M).

Head to head
Blended price uses a 3:1 input:output mix
Gemini 3.1 Pro PreviewGPT-5.6 Terra
ProviderGoogleOpenAI
Input $/1M$2.00$1.00
Output $/1M$12.00$6.00
Blended $/1M$4.50$2.25
Context window1.0M1.1M
Max output66K128K
ReleasedFeb 2026Jul 2026
LicenceProprietaryProprietary
GPQA Diamond 94.4% 93.3%
FrontierMath T1–3 59.6% 86.0%
FrontierMath T4 26.8% 70.7%
SimpleQA Verified 77.3% 43.1%
OTIS Mock AIME 95.6% 99.7%
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…
  • Higher GPQA Diamond (94.4% vs 93.3%)
  • Higher SimpleQA Verified (77.3% vs 43.1%)
Choose GPT-5.6 Terra if…
  • Costs less per token — $2.25 vs $4.50 blended
  • Higher FrontierMath T1–3 (86.0% vs 59.6%)
  • Higher FrontierMath T4 (70.7% vs 26.8%)
  • Higher OTIS Mock AIME (99.7% vs 95.6%)
  • Larger context window (1.1M)
  • Newer model (released Jul 2026)
FAQ
Which is better, Gemini 3.1 Pro Preview or GPT-5.6 Terra?
Across the 5 benchmarks both models have independently-run scores for, Gemini 3.1 Pro Preview leads on 2 and GPT-5.6 Terra leads on 3. Benchmarks are one input — price and context window are on this page too.
Is Gemini 3.1 Pro Preview cheaper than GPT-5.6 Terra?
GPT-5.6 Terra is cheaper: $2.25 versus $4.50 per million tokens blended at 3:1 input:output. Input alone: $2.00 vs $1.00. Output alone: $12.00 vs $6.00.
What context windows do Gemini 3.1 Pro Preview and GPT-5.6 Terra have?
Gemini 3.1 Pro Preview: 1,048,576 tokens. GPT-5.6 Terra: 1,050,000 tokens.
Who makes Gemini 3.1 Pro Preview and GPT-5.6 Terra?
Gemini 3.1 Pro Preview is made by Google. GPT-5.6 Terra is made by OpenAI.
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