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Comparison · 2 models · Updated Nov 2, 2026

Gemini 2.5 Flash vs GPT-4.1

Gemini 2.5 Flash comes out ahead, 66 to 52 on our weighted score, and it is the cheaper option too.

  1. Our pick

    Google

    Gemini 2.5 Flash

    Released Jun 17, 2025

    66/100
    • ECI140.6
    • Price$0.30 / $2.50
    • Context1.05M
    Full specs Remove Gemini 2.5 Flash

  2. OpenAI

    GPT-4.1

    Released Apr 14, 2025

    52/100
    • ECI136.7
    • Price$2.00 / $8.00
    • Context1.05M
    Full specs Remove GPT-4.1

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Gemini 2.5 Flash is our pick

Gemini 2.5 Flash is the better all-round choice, scoring 66/100 against GPT-4.1 (52). It leads on capability, price and inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGemini 2.5 FlashCapabilities Index (ECI): Gemini 2.5 Flash 140.6 · GPT-4.1 136.7
  • Lowest priceGemini 2.5 FlashGemini 2.5 Flash $0.85 · GPT-4.1 $3.50 per 1M tokens (3:1 blend)
  • Longest contextAbout the sameGemini 2.5 Flash 1,048,576 · GPT-4.1 1,047,576 tokens
  • Widest inputsGemini 2.5 FlashGemini 2.5 Flash: Text, Images, PDFs, Audio, Video · GPT-4.1: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGemini 2.5 FlashGPT-4.1
CapabilityCapabilities Index (ECI)50%6560
Price25%5123
Inputs & features15%10070
Context window10%6161
Overall100%66/10052/100
02 — Side by side

Every spec in one table

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

Gemini 2.5 Flash vs GPT-4.1 specifications side by side
SpecificationGemini 2.5 FlashGoogleGPT-4.1OpenAI
Capability
Capabilities Index (ECI)140.6 (best)136.7
ECI rank#110 of 165 (best)#125 of 165
GPQA DiamondGraduate-level science questions—66.9%
FrontierMath Tiers 1–3Research-level mathematics—6.0%
OTIS Mock AIME 2024–2025Competition mathematics—38.3%
SWE-bench VerifiedFixing real GitHub issues—48.5%
SimpleQA VerifiedShort factual questions—31.1%
Price per million tokens
Input$0.30 (best)$2.00
Output$2.50 (best)$8.00
Cached input$0.03 (best)$0.50
Blended (3:1)$0.85 (best)$3.50
Long-context rateSame rateSame rate
Price sourceOfficial Google APIOfficial OpenAI API
Limits
Context window1,048,576 tokens (best)1,047,576 tokens
Max output65,536 tokens (best)32,768 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioYesNo
VideoYesNo
ReasoningYesNo
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgemini-2.5-flashgpt-4.1
API providers32 (best)31
ReleasedJun 17, 2025Apr 14, 2025
Knowledge cutoffJan 2025Apr 2024
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 Flash$8.00
  • GPT-4.1$36.00
04 — Questions

Which should you choose?

Which is better: Gemini 2.5 Flash or GPT-4.1?

Gemini 2.5 Flash is the better all-round choice, scoring 66/100 against GPT-4.1 (52). It leads on capability, price and inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Gemini 2.5 Flash or GPT-4.1?

Gemini 2.5 Flash is cheaper at $0.30 input / $2.50 output per million tokens (official Google API price). GPT-4.1 costs $2.00 input / $8.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $0.85 per million tokens for Gemini 2.5 Flash versus $3.50 for GPT-4.1 (4.1× as much).

Which scores higher on benchmarks?

Gemini 2.5 Flash scores higher on the Capabilities Index (ECI): Gemini 2.5 Flash 140.6 (#110 of 165) and GPT-4.1 136.7 (#125 of 165). The confidence ranges of the top two overlap (138.4–142.1 vs 134.0–138.5), so treat the gap as small.

Which is better for coding?

There are no published SWE-bench Verified results for Gemini 2.5 Flash yet, so there is no like-for-like coding score. On overall capability, Gemini 2.5 Flash leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

Their context windows are effectively the same size: Gemini 2.5 Flash 1,048,576 and GPT-4.1 1,047,576 tokens. Maximum output per response: Gemini 2.5 Flash up to 65,536, GPT-4.1 up to 32,768 tokens.

Which can read images, PDFs, audio or video?

Gemini 2.5 Flash accepts text, images, PDFs, audio and video; GPT-4.1 accepts text, images and PDFs. Gemini 2.5 Flash handles the widest range of inputs.

Are any of these open source?

No. Gemini 2.5 Flash and GPT-4.1 are proprietary and only available through APIs and apps.

Which is newer?

Gemini 2.5 Flash is the newest, released Jun 17, 2025. GPT-4.1 came out Apr 14, 2025. Knowledge cutoff: Gemini 2.5 Flash Jan 2025, GPT-4.1 Apr 2024.

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 Nov 2, 2026.

05 — Keep comparing

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