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Comparison · 3 models · Updated Oct 4, 2026

Gemini 2.5 Computer Use Preview vs GPT-5.1 Chat vs GPT-5.1 Codex Max

GPT-5.1 Codex Max comes out ahead, 42 to 38 and 35 on our weighted score.

  1. Google

    Gemini 2.5 Computer Use Preview

    Released Oct 7, 2025

    35/100
    • ECI—
    • Price$1.25 / $10.00
    • Context128K
    Full specs Remove Gemini 2.5 Computer Use Preview

  2. OpenAI

    GPT-5.1 Chat

    Released Nov 13, 2025

    38/100
    • ECI—
    • Price$1.25 / $10.00
    • Context128K
    Full specs Remove GPT-5.1 Chat
  3. Our pick

    OpenAI

    GPT-5.1 Codex Max

    Released Nov 13, 2025

    42/100
    • ECI—
    • Price$1.25 / $10.00
    • Context400K
    Full specs Remove GPT-5.1 Codex Max
01 — Verdict

GPT-5.1 Codex Max is our pick

GPT-5.1 Codex Max is the better all-round choice, scoring 42/100 against GPT-5.1 Chat (38) and Gemini 2.5 Computer Use Preview (35). It leads on 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 priceSame priceGemini 2.5 Computer Use Preview $3.44 · GPT-5.1 Chat $3.44 · GPT-5.1 Codex Max $3.44 per 1M tokens (3:1 blend)
  • Longest contextGPT-5.1 Codex MaxGPT-5.1 Codex Max 400,000 · Gemini 2.5 Computer Use Preview 128,000 · GPT-5.1 Chat 128,000 tokens
  • Widest inputsSame inputsGemini 2.5 Computer Use Preview: Text, Images · GPT-5.1 Chat: Text, Images · GPT-5.1 Codex Max: Text, Images
  • Self-hostingNo open weightsAll three are available only through APIs
How the score is built
MeasureWeightGemini 2.5 Computer Use PreviewGPT-5.1 ChatGPT-5.1 Codex Max
Price50%242424
Inputs & features30%607070
Context window20%242444
Overall100%35/10038/10042/100

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 2.5 Computer Use Preview vs GPT-5.1 Chat vs GPT-5.1 Codex Max specifications side by side
SpecificationGemini 2.5 Computer Use PreviewGoogleGPT-5.1 ChatOpenAIGPT-5.1 Codex MaxOpenAI
Capability
Capabilities Index (ECI)———
ECI rank———
Price per million tokens
Input$1.25$1.25$1.25
Output$10.00$10.00$10.00
Cached input———
Blended (3:1)$3.44$3.44$3.44
Long-context rateOver 200K: $2.50 / $15.00Same rateSame rate
Price sourceOfficial Google APIMedian of 2 providersMedian of 8 providers
Limits
Context window128,000 tokens128,000 tokens400,000 tokens (best)
Max output64,000 tokens16,384 tokens128,000 tokens (best)
Inputs and features
TextYesYesYes
ImagesYesYesYes
PDFsNoNoNo
AudioNoNoNo
VideoNoNoNo
ReasoningYesYesYes
Tool callingYesYesYes
Structured outputNoYesYes
Availability
WeightsProprietaryProprietaryProprietary
API model IDgemini-2.5-computer-use-preview-10-2025——
API providers228 (best)
ReleasedOct 7, 2025Nov 13, 2025Nov 13, 2025
Knowledge cutoffJan 2025Sep 30, 2024Sep 30, 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 Computer Use Preview$32.50
  • GPT-5.1 Chat$32.50
  • GPT-5.1 Codex Max$32.50
04 — Questions

Which should you choose?

Which is better: Gemini 2.5 Computer Use Preview, GPT-5.1 Chat or GPT-5.1 Codex Max?

GPT-5.1 Codex Max is the better all-round choice, scoring 42/100 against GPT-5.1 Chat (38) and Gemini 2.5 Computer Use Preview (35). It leads on 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 2.5 Computer Use Preview, GPT-5.1 Chat or GPT-5.1 Codex Max?

Gemini 2.5 Computer Use Preview, GPT-5.1 Chat and GPT-5.1 Codex Max cost the same: $1.25 input / $10.00 output per million tokens.

Which scores higher on benchmarks?

There is no independent benchmark that covers all three models yet. Gemini 2.5 Computer Use Preview has not been scored yet, GPT-5.1 Chat has not been scored yet and GPT-5.1 Codex Max has not been scored yet.

Which is better for coding?

There are no published SWE-bench Verified results for Gemini 2.5 Computer Use Preview, GPT-5.1 Chat and GPT-5.1 Codex Max yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.

Which has the bigger context window?

GPT-5.1 Codex Max has the largest context window at 400,000 tokens, against 128,000 for Gemini 2.5 Computer Use Preview and 128,000 for GPT-5.1 Chat. Maximum output per response: Gemini 2.5 Computer Use Preview up to 64,000, GPT-5.1 Chat up to 16,384, GPT-5.1 Codex Max up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Gemini 2.5 Computer Use Preview accepts text and images; GPT-5.1 Chat accepts text and images; GPT-5.1 Codex Max accepts text and images. They handle the same number of input types.

Are any of these open source?

No. Gemini 2.5 Computer Use Preview, GPT-5.1 Chat and GPT-5.1 Codex Max are proprietary and only available through APIs and apps.

Which is newer?

GPT-5.1 Chat is the newest, released Nov 13, 2025. GPT-5.1 Codex Max came out Nov 13, 2025; Gemini 2.5 Computer Use Preview came out Oct 7, 2025. Knowledge cutoff: Gemini 2.5 Computer Use Preview Jan 2025, GPT-5.1 Chat Sep 30, 2024, GPT-5.1 Codex Max Sep 30, 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 Oct 4, 2026.

05 — Keep comparing

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