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Comparison · 2 models · Updated Oct 4, 2026

Gemini 2.5 Pro vs GPT-5.2

Too close to call on our weighted score (Gemini 2.5 Pro 63, GPT-5.2 61). The right pick depends on what you value most.

  1. Google

    Gemini 2.5 Pro

    Released Jun 17, 2025

    63/100
    • ECI145.3
    • Price$1.25 / $10.00
    • Context1.05M
    Full specs Remove Gemini 2.5 Pro

  2. OpenAI

    GPT-5.2

    Released Dec 11, 2025

    61/100
    • ECI153.5
    • Price$1.75 / $14.00
    • Context400K
    Full specs Remove GPT-5.2

  3. Add a model

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01 — Verdict

Too close to call

It is close. Our weighted score puts them within 3 points (Gemini 2.5 Pro 63/100, GPT-5.2 61/100), so choose by what matters most for your work: GPT-5.2 for raw capability, Gemini 2.5 Pro on price and Gemini 2.5 Pro for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGPT-5.2Capabilities Index (ECI): GPT-5.2 153.5 · Gemini 2.5 Pro 145.3
  • Lowest priceGemini 2.5 ProGemini 2.5 Pro $3.44 · GPT-5.2 $4.81 per 1M tokens (3:1 blend)
  • Longest contextGemini 2.5 ProGemini 2.5 Pro 1,048,576 · GPT-5.2 400,000 tokens
  • Widest inputsGemini 2.5 ProGemini 2.5 Pro: Text, Images, PDFs, Audio, Video · GPT-5.2: Text, Images
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGemini 2.5 ProGPT-5.2
CapabilityCapabilities Index (ECI)50%7283
Price25%2418
Inputs & features15%10070
Context window10%6144
Overall100%63/10061/100
02 — Side by side

Every spec in one table

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

Gemini 2.5 Pro vs GPT-5.2 specifications side by side
SpecificationGemini 2.5 ProGoogleGPT-5.2OpenAI
Capability
Capabilities Index (ECI)145.3153.5 (best)
ECI rank#78 of 148#38 of 148 (best)
GPQA DiamondGraduate-level science questions85.3%91.4% (best)
FrontierMath Tiers 1–3Research-level mathematics24.6%67.4% (best)
OTIS Mock AIME 2024–2025Competition mathematics84.7%96.1% (best)
SWE-bench VerifiedFixing real GitHub issues57.6%73.8% (best)
SimpleQA VerifiedShort factual questions—37.1%
Price per million tokens
Input$1.25 (best)$1.75
Output$10.00 (best)$14.00
Cached input$0.125 (best)$0.175
Blended (3:1)$3.44 (best)$4.81
Long-context rateOver 200K: $2.50 / $15.00Same rate
Price sourceOfficial Google APIOfficial OpenAI API
Limits
Context window1,048,576 tokens (best)400,000 tokens
Max output65,536 tokens128,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesNo
AudioYesNo
VideoYesNo
ReasoningYesYeslow · medium · high · xhigh
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgemini-2.5-progpt-5.2
API providers22 (best)21
ReleasedJun 17, 2025Dec 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 2.5 Pro$32.50
  • GPT-5.2$45.50
04 — Questions

Which should you choose?

Which is better: Gemini 2.5 Pro or GPT-5.2?

It is close. Our weighted score puts them within 3 points (Gemini 2.5 Pro 63/100, GPT-5.2 61/100), so choose by what matters most for your work: GPT-5.2 for raw capability, Gemini 2.5 Pro on price and Gemini 2.5 Pro for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Gemini 2.5 Pro or GPT-5.2?

Gemini 2.5 Pro is cheaper at $1.25 input / $10.00 output per million tokens (official Google API price). GPT-5.2 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 $3.44 per million tokens for Gemini 2.5 Pro versus $4.81 for GPT-5.2 (1.4× as much).

Which scores higher on benchmarks?

GPT-5.2 scores higher on the Capabilities Index (ECI): GPT-5.2 153.5 (#38 of 148) and Gemini 2.5 Pro 145.3 (#78 of 148). Their confidence ranges do not overlap (151.7–155.4 vs 143.6–146.9), so the gap is a real one. On individual benchmarks: GPQA Diamond — GPT-5.2 91.4%, Gemini 2.5 Pro 85.3%; FrontierMath Tiers 1–3 — GPT-5.2 67.4%, Gemini 2.5 Pro 24.6%; OTIS Mock AIME 2024–2025 — GPT-5.2 96.1%, Gemini 2.5 Pro 84.7%; SWE-bench Verified — GPT-5.2 73.8%, Gemini 2.5 Pro 57.6%.

Which is better for coding?

GPT-5.2 resolves more real GitHub issues on SWE-bench Verified: GPT-5.2 73.8% and Gemini 2.5 Pro 57.6%. Both support tool calling for agent workflows.

Which has the bigger context window?

Gemini 2.5 Pro has the largest context window at 1,048,576 tokens, against 400,000 for GPT-5.2. Maximum output per response: Gemini 2.5 Pro up to 65,536, GPT-5.2 up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Gemini 2.5 Pro accepts text, images, PDFs, audio and video; GPT-5.2 accepts text and images. Gemini 2.5 Pro handles the widest range of inputs.

Are any of these open source?

No. Gemini 2.5 Pro and GPT-5.2 are proprietary and only available through APIs and apps.

Which is newer?

GPT-5.2 is the newest, released Dec 11, 2025. Gemini 2.5 Pro came out Jun 17, 2025. Knowledge cutoff: Gemini 2.5 Pro Jan 2025, GPT-5.2 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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