WhichAI / Compare / Gemini 3.1 Pro vs GPT-5.6 Terra

Gemini 3.1 ProvsGPT-5.6 Terra

GPT-5.6 Terra scores higher on the July 16 index. Full context below: price, context window, strengths and honest limits. Verified July 26, 2026.

Gemini 3.1 Pro

GPT-5.6 Terra

Provider

AA index

46.5

Released

n/a

2026-07-09

Context

n/a

Price $/1M

$2 / $12

$2.5 / $15

Access

Google AI Pro $19.99/mo · API · inside Perplexity Pro

Released July 9, 2026 · API $2.50/$15 per 1M tokens

n/a = not published or not yet verified. Scores marked ~ are WhichAI estimates and should not be compared 1:1 with measured scores.

In one line each

Gemini 3.1 Pro: #1 in LMArena's coding arena at launch, deep Google Workspace integration and strong multimodal work.

GPT-5.6 Terra: The balanced tier of the GPT-5.6 family - GPT-5.5-level quality at half the price. On track to become the everyday ChatGPT default.

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