Skip to content
ModelCap

Head-to-head comparison

Gemini 3.1 Pro Preview vs GPT-5.2 Chat

Gemini 3.1 Pro Preview (Google) and GPT-5.2 Chat (OpenAI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 11 August 2026

As of 11 August 2026, Gemini 3.1 Pro Preview holds the stronger ModelCap Index position (#6 vs #9); Gemini 3.1 Pro Preview is 1.2× cheaper per output token ($12.00/1M vs $14.00/1M); and Gemini 3.1 Pro Preview offers the longer context window (1M vs 128K tokens).

Which should you choose?

Choose Gemini 3.1 Pro Preview if…

  • you want the stronger overall ModelCap Index position — #6 against #9 (77.7 vs 74.1 points).
  • API cost matters — $12.00/1M output tokens against $14.00/1M, about 1.2× cheaper.
  • you need the longer context window — 1M tokens against 128K.
  • you want provider choice — 2 listed API providers against 1.
  • Arena text is your yardstick — 1486 against 1476.
  • Arena coding is your yardstick — 1521 against 1515.
  • you want the more recently listed model — Gemini 3.1 Pro Preview was listed 19 February 2026, GPT-5.2 Chat 10 December 2025.

Choose GPT-5.2 Chat if…

  • your workload is prompt-heavy — input tokens cost $1.75/1M against $2.00/1M.

Gemini 3.1 Pro Preview vs GPT-5.2 Chat: specs, pricing and context

Specification comparison of Gemini 3.1 Pro Preview and GPT-5.2 Chat
FieldGemini 3.1 Pro PreviewGoogleGPT-5.2 ChatOpenAI
ModelCap Index position#6#9
Index score77.774.1
EvidenceMeasuredMeasured
Input price / 1M tokens$2.00$1.75
Output price / 1M tokens$12.00$14.00
Context window1M tokens128K tokens
Max output tokens66K32K
API providers listed21
Weight accessAPI onlyAPI only
Input modalitiesAudio, File, Image, Text, VideoFile, Image, Text
First listed19 February 202610 December 2025
PublisherGoogleOpenAI

Evidence: 3 public benchmark observations across 3 boards · 2 public benchmark observations across 2 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Gemini 3.1 Pro Preview vs GPT-5.2 Chat

Public benchmark boards where Gemini 3.1 Pro Preview or GPT-5.2 Chat has a published result
BoardGemini 3.1 Pro PreviewGPT-5.2 ChatLeads
Arena textArena (LMArena)14861483–148914761472–1480Gemini 3.1 Pro Preview
Arena codingArena (LMArena)15211515–152615151508–1522Gemini 3.1 Pro Preview
LMArena AgentLMArena-0.5%-1.3%–0.2%—Only one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Gemini 3.1 Pro Preview vs GPT-5.2 Chat: common questions

Is Gemini 3.1 Pro Preview better than GPT-5.2 Chat?

Gemini 3.1 Pro Preview ranks higher on the ModelCap Index as of 11 August 2026: #6 against #9. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it.

Is Gemini 3.1 Pro Preview cheaper than GPT-5.2 Chat?

Gemini 3.1 Pro Preview is cheaper on output tokens: $12.00/1M against $14.00/1M. Input tokens are $2.00/1M for Gemini 3.1 Pro Preview and $1.75/1M for GPT-5.2 Chat. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Gemini 3.1 Pro Preview or GPT-5.2 Chat?

Gemini 3.1 Pro Preview has the larger context window: 1M tokens against 128K.

Which is better for coding, Gemini 3.1 Pro Preview or GPT-5.2 Chat?

Arena coding: Gemini 3.1 Pro Preview 1521, GPT-5.2 Chat 1515 — Gemini 3.1 Pro Preview leads.

Are Gemini 3.1 Pro Preview and GPT-5.2 Chat open-weight models?

Gemini 3.1 Pro Preview: API only. GPT-5.2 Chat: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Gemini 3.1 Pro Preview and GPT-5.2 Chat?

ModelCap currently lists 2 API providers for Gemini 3.1 Pro Preview and 1 for GPT-5.2 Chat, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Gemini 3.1 Pro Preview vs GPT-5.2 Chat comparison?

Every figure comes from the sealed ModelCap dataset published 11 August 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

Explore further