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Comparison · 2 models · Updated Oct 4, 2026

Gemini 3.1 Pro Preview vs GPT-5.2 Chat

Gemini 3.1 Pro Preview comes out ahead, 52 to 35 on our weighted score, and it is the cheaper option too.

  1. Our pick

    Google

    Gemini 3.1 Pro Preview

    Released Feb 19, 2026

    52/100
    • ECI154.8
    • Price$2.00 / $12.00
    • Context1.05M
    Full specs Remove Gemini 3.1 Pro Preview

  2. OpenAI

    GPT-5.2 Chat

    Released Dec 11, 2025Deprecated

    35/100
    • ECI—
    • Price$1.75 / $14.00
    • Context128K
    Full specs Remove GPT-5.2 Chat

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Gemini 3.1 Pro Preview is our pick

Gemini 3.1 Pro Preview is the better all-round choice, scoring 52/100 against GPT-5.2 Chat (35). It leads on inputs & features and context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

  • CapabilityNot enough dataNo independent benchmark covers every model here yet
  • Lowest priceGemini 3.1 Pro PreviewGemini 3.1 Pro Preview $4.50 · GPT-5.2 Chat $4.81 per 1M tokens (3:1 blend)
  • Longest contextGemini 3.1 Pro PreviewGemini 3.1 Pro Preview 1,048,576 · GPT-5.2 Chat 128,000 tokens
  • Widest inputsGemini 3.1 Pro PreviewGemini 3.1 Pro Preview: Text, Images, PDFs, Audio, Video · GPT-5.2 Chat: Text, Images
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGemini 3.1 Pro PreviewGPT-5.2 Chat
Price50%1918
Inputs & features30%10070
Context window20%6124
Overall100%52/10035/100

Left out because at least one model lacks the data: capability. The remaining weights were rescaled.

02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Gemini 3.1 Pro Preview vs GPT-5.2 Chat specifications side by side
SpecificationGemini 3.1 Pro PreviewGoogleGPT-5.2 ChatOpenAI
Capability
Capabilities Index (ECI)154.8—
ECI rank#31 of 148—
GPQA DiamondGraduate-level science questions94.4%—
FrontierMath Tiers 1–3Research-level mathematics59.7%—
OTIS Mock AIME 2024–2025Competition mathematics95.6%—
SWE-bench VerifiedFixing real GitHub issues75.6%—
SimpleQA VerifiedShort factual questions73.5%—
Price per million tokens
Input$2.00$1.75 (best)
Output$12.00 (best)$14.00
Cached input$0.20$0.175 (best)
Blended (3:1)$4.50 (best)$4.81
Long-context rateOver 200K: $4.00 / $18.00Same rate
Price sourceOfficial Google APIOfficial OpenAI API
Limits
Context window1,048,576 tokens (best)128,000 tokens
Max output65,536 tokens (best)16,384 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesNo
AudioYesNo
VideoYesNo
ReasoningYeslow · medium · highYesmedium
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgemini-3.1-pro-previewgpt-5.2-chat-latest
API providers26 (best)3
ReleasedFeb 19, 2026Dec 11, 2025
Knowledge cutoffJan 2025Aug 31, 2025
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Gemini 3.1 Pro Preview$44.00
  • GPT-5.2 Chat$45.50
04 — Questions

Which should you choose?

Which is better: Gemini 3.1 Pro Preview or GPT-5.2 Chat?

Gemini 3.1 Pro Preview is the better all-round choice, scoring 52/100 against GPT-5.2 Chat (35). It leads on inputs & features and context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

Which is cheaper, Gemini 3.1 Pro Preview or GPT-5.2 Chat?

Gemini 3.1 Pro Preview is cheaper at $2.00 input / $12.00 output per million tokens (official Google API price). GPT-5.2 Chat costs $1.75 input / $14.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $4.50 per million tokens for Gemini 3.1 Pro Preview versus $4.81 for GPT-5.2 Chat (1.1× as much).

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Gemini 3.1 Pro Preview has an ECI of 154.8 and GPT-5.2 Chat has not been scored yet.

Which is better for coding?

There are no published SWE-bench Verified results for GPT-5.2 Chat yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.

Which has the bigger context window?

Gemini 3.1 Pro Preview has the largest context window at 1,048,576 tokens, against 128,000 for GPT-5.2 Chat. Maximum output per response: Gemini 3.1 Pro Preview up to 65,536, GPT-5.2 Chat up to 16,384 tokens.

Which can read images, PDFs, audio or video?

Gemini 3.1 Pro Preview accepts text, images, PDFs, audio and video; GPT-5.2 Chat accepts text and images. Gemini 3.1 Pro Preview handles the widest range of inputs.

Are any of these open source?

No. Gemini 3.1 Pro Preview and GPT-5.2 Chat are proprietary and only available through APIs and apps.

Which is newer?

Gemini 3.1 Pro Preview is the newest, released Feb 19, 2026. GPT-5.2 Chat came out Dec 11, 2025. Knowledge cutoff: Gemini 3.1 Pro Preview Jan 2025, GPT-5.2 Chat Aug 31, 2025.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

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