← Back to all comparisons

Gemini 3.1 Pro vs GPT-5.6 Terra — Price, Context, and Capability Compared

Verdict

Gemini 3.1 Pro and GPT-5.6 Terra are priced within a few percent of each other. Gemini 3.1 Pro has the larger context window (2,000,000 tokens). Default to Gemini 3.1 Pro unless you specifically need GPT-5.6 Terra's edge.

Spec comparison

Gemini 3.1 ProGPT-5.6 Terra
Price (input)$2.00/M$2.00/M
Price (output)$12.00/M$12.00/M
Blended price$4.50/M$4.50/M
Context window2,000,000 tokens400,000 tokens
Max output64,000 tokens128,000 tokens
Modalitiestext, vision, audiotext, vision
Reasoning modeYesYes
Released2026-022026-06
Speed55 t/s78 t/s

Cost at scale (3:1 blended)

Tokens / monthGemini 3.1 ProGPT-5.6 TerraDelta
1,000,000$4.50$4.50$0.0000 (1.0×)
10,000,000$45.00$45.00$0.0000 (1.0×)
100,000,000$450.00$450.00$0.0000 (1.0×)

Choose Gemini 3.1 Pro if…

  • Largest context window of any current model (2M tokens)
  • Native audio and video understanding
  • Google Search grounding
  • Whole-codebase, whole-document, or long-video analysis in a single request.

Choose GPT-5.6 Terra if…

  • Balanced cost-to-intelligence ratio
  • Reasoning mode available on demand
  • Same 400K context as Sol
  • Everyday production workloads that need strong quality without Sol-tier pricing.

Run this exact matchup right now

Send the same prompt to Gemini 3.1 Pro and GPT-5.6 Terra side by side and see the outputs yourself.

Try Gemini 3.1 Pro vs GPT-5.6 Terra Free

FAQ

Is Gemini 3.1 Pro cheaper than GPT-5.6 Terra?

Gemini 3.1 Pro is cheaper, at $4.50 per million blended tokens vs $4.50 for GPT-5.6 Terra.

Which has the bigger context window, Gemini 3.1 Pro or GPT-5.6 Terra?

Gemini 3.1 Pro has the larger context window: 2,000,000 tokens vs 400,000.

Can Gemini 3.1 Pro replace GPT-5.6 Terra for coding?

Both are viable for coding. Largest context window of any current model (2M tokens) (Gemini 3.1 Pro) vs Balanced cost-to-intelligence ratio (GPT-5.6 Terra) — pick based on which strength matters more for your workload.

Which is faster, Gemini 3.1 Pro or GPT-5.6 Terra?

GPT-5.6 Terra is faster: 78 t/s vs 55 t/s, measured on our speed benchmarks.

Related

Gemini 3.1 Pro pricingGPT-5.6 Terra pricingvs Claude Opus 4.8vs Grok 4.3vs Claude Sonnet 4.6vs Claude Haiku 4.5Premium model tests

Pricing verified 2026-04-06. Specs verified 2026-08-08.