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Comparison · 2 models · Updated Oct 4, 2026

GPT-5 vs Gemini 2.5 Pro

Gemini 2.5 Pro comes out ahead, 63 to 60 on our weighted score.

  1. OpenAI

    GPT-5

    Released Aug 7, 2025

    60/100
    • ECI150.0
    • Price$1.25 / $10.00
    • Context400K
    Full specs Remove GPT-5
  2. Our pick

    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

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Gemini 2.5 Pro is our pick

Gemini 2.5 Pro is the better all-round choice, scoring 63/100 against GPT-5 (60). It leads on inputs & features and context window. GPT-5 wins on capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGPT-5Capabilities Index (ECI): GPT-5 150.0 · Gemini 2.5 Pro 145.3
  • Lowest priceSame priceGPT-5 $3.44 · Gemini 2.5 Pro $3.44 per 1M tokens (3:1 blend)
  • Longest contextGemini 2.5 ProGemini 2.5 Pro 1,048,576 · GPT-5 400,000 tokens
  • Widest inputsGemini 2.5 ProGPT-5: Text, Images · Gemini 2.5 Pro: Text, Images, PDFs, Audio, Video
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGPT-5Gemini 2.5 Pro
CapabilityCapabilities Index (ECI)50%7872
Price25%2424
Inputs & features15%70100
Context window10%4461
Overall100%60/10063/100
02 — Side by side

Every spec in one table

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

GPT-5 vs Gemini 2.5 Pro specifications side by side
SpecificationGPT-5OpenAIGemini 2.5 ProGoogle
Capability
Capabilities Index (ECI)150.0 (best)145.3
ECI rank#50 of 148 (best)#78 of 148
GPQA DiamondGraduate-level science questions86.2% (best)85.3%
FrontierMath Tiers 1–3Research-level mathematics55.4% (best)24.6%
OTIS Mock AIME 2024–2025Competition mathematics91.4% (best)84.7%
SWE-bench VerifiedFixing real GitHub issues73.6% (best)57.6%
SimpleQA VerifiedShort factual questions50.1%—
Price per million tokens
Input$1.25$1.25
Output$10.00$10.00
Cached input$0.125$0.125
Blended (3:1)$3.44$3.44
Long-context rateSame rateOver 200K: $2.50 / $15.00
Price sourceOfficial OpenAI APIOfficial Google API
Limits
Context window400,000 tokens1,048,576 tokens (best)
Max output128,000 tokens (best)65,536 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsNoYes
AudioNoYes
VideoNoYes
ReasoningYesminimal · low · medium · highYes
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgpt-5gemini-2.5-pro
API providers24 (best)22
ReleasedAug 7, 2025Jun 17, 2025
Knowledge cutoffSep 30, 2024Jan 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.

  • GPT-5$32.50
  • Gemini 2.5 Pro$32.50
04 — Questions

Which should you choose?

Which is better: GPT-5 or Gemini 2.5 Pro?

Gemini 2.5 Pro is the better all-round choice, scoring 63/100 against GPT-5 (60). It leads on inputs & features and context window. GPT-5 wins on capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, GPT-5 or Gemini 2.5 Pro?

GPT-5 and Gemini 2.5 Pro cost the same: $1.25 input / $10.00 output per million tokens.

Which scores higher on benchmarks?

GPT-5 scores higher on the Capabilities Index (ECI): GPT-5 150.0 (#50 of 148) and Gemini 2.5 Pro 145.3 (#78 of 148). On individual benchmarks: GPQA Diamond — GPT-5 86.2%, Gemini 2.5 Pro 85.3%; FrontierMath Tiers 1–3 — GPT-5 55.4%, Gemini 2.5 Pro 24.6%; OTIS Mock AIME 2024–2025 — GPT-5 91.4%, Gemini 2.5 Pro 84.7%; SWE-bench Verified — GPT-5 73.6%, Gemini 2.5 Pro 57.6%.

Which is better for coding?

GPT-5 resolves more real GitHub issues on SWE-bench Verified: GPT-5 73.6% 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. Maximum output per response: GPT-5 up to 128,000, Gemini 2.5 Pro up to 65,536 tokens.

Which can read images, PDFs, audio or video?

GPT-5 accepts text and images; Gemini 2.5 Pro accepts text, images, PDFs, audio and video. Gemini 2.5 Pro handles the widest range of inputs.

Are any of these open source?

No. GPT-5 and Gemini 2.5 Pro are proprietary and only available through APIs and apps.

Which is newer?

GPT-5 is the newest, released Aug 7, 2025. Gemini 2.5 Pro came out Jun 17, 2025. Knowledge cutoff: GPT-5 Sep 30, 2024, Gemini 2.5 Pro Jan 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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