ZMIME
Comparison · 2 models · Updated Nov 2, 2026

Gemini 4 Argon vs GPT-5.6 Sol

Gemini 4 Argon comes out ahead, 74 to 66 on our weighted score, and it is the cheaper option too.

  1. Our pick

    Google

    Gemini 4 Argon

    Released Oct 13, 2026New

    74/100
    • ECI166.1
    • Price$2.00 / $10.00
    • Context1.05M
    Full specs Remove Gemini 4 Argon

  2. OpenAI

    GPT-5.6 Sol

    Released Jul 9, 2026

    66/100
    • ECI162.6
    • Price$4.00 / $20.00
    • Context1.05M
    Full specs Remove GPT-5.6 Sol

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Gemini 4 Argon is our pick

Gemini 4 Argon is the better all-round choice, scoring 74/100 against GPT-5.6 Sol (66). It leads on capability, price and inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGemini 4 ArgonCapabilities Index (ECI): Gemini 4 Argon 166.1 · GPT-5.6 Sol 162.6
  • Lowest priceGemini 4 ArgonGemini 4 Argon $4.00 · GPT-5.6 Sol $8.00 per 1M tokens (3:1 blend)
  • Longest contextAbout the sameGPT-5.6 Sol 1,050,000 · Gemini 4 Argon 1,048,576 tokens
  • Widest inputsGemini 4 ArgonGemini 4 Argon: Text, Images, PDFs, Audio, Video · GPT-5.6 Sol: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGemini 4 ArgonGPT-5.6 Sol
CapabilityCapabilities Index (ECI)50%9692
Price25%207
Inputs & features15%10080
Context window10%6161
Overall100%74/10066/100
02 — Side by side

Every spec in one table

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

Gemini 4 Argon vs GPT-5.6 Sol specifications side by side
SpecificationGemini 4 ArgonGoogleGPT-5.6 SolOpenAI
Capability
Capabilities Index (ECI)166.1 (best)162.6
ECI rank#7 of 165 (best)#12 of 165
GPQA DiamondGraduate-level science questions96.4% (best)93.5%
FrontierMath Tiers 1–3Research-level mathematics86.0%89.1% (best)
OTIS Mock AIME 2024–2025Competition mathematics100%100%
SimpleQA VerifiedShort factual questions76.0% (best)69.7%
Price per million tokens
Input$2.00 (best)$4.00
Output$10.00 (best)$20.00
Cached input$0.10 (best)$0.40
Blended (3:1)$4.00 (best)$8.00
Long-context rateSame rateOver 272K: $8.00 / $30.00
Price sourceOfficial Google APIOfficial OpenAI API
Limits
Context window1,048,576 tokens1,050,000 tokens (best)
Max output65,536 tokens128,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioYesNo
VideoYesNo
ReasoningYeslow · medium · highYeslow · medium · high · xhigh · max
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgemini-4-argongpt-5.6-sol
API providers2449 (best)
ReleasedOct 13, 2026Jul 9, 2026
Knowledge cutoffMar 2026Feb 16, 2026
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 4 Argon$40.00
  • GPT-5.6 Sol$80.00
04 — Questions

Which should you choose?

Which is better: Gemini 4 Argon or GPT-5.6 Sol?

Gemini 4 Argon is the better all-round choice, scoring 74/100 against GPT-5.6 Sol (66). 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 4 Argon or GPT-5.6 Sol?

Gemini 4 Argon is cheaper at $2.00 input / $10.00 output per million tokens (official Google API price). GPT-5.6 Sol costs $4.00 input / $20.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $4.00 per million tokens for Gemini 4 Argon versus $8.00 for GPT-5.6 Sol (2× as much).

Which scores higher on benchmarks?

Gemini 4 Argon scores higher on the Capabilities Index (ECI): Gemini 4 Argon 166.1 (#7 of 165) and GPT-5.6 Sol 162.6 (#12 of 165). The confidence ranges of the top two overlap (163.1–170.3 vs 159.6–166.2), so treat the gap as small. On individual benchmarks: GPQA Diamond — Gemini 4 Argon 96.4%, GPT-5.6 Sol 93.5%; FrontierMath Tiers 1–3 — GPT-5.6 Sol 89.1%, Gemini 4 Argon 86.0%; OTIS Mock AIME 2024–2025 — Gemini 4 Argon 100%, GPT-5.6 Sol 100%; SimpleQA Verified — Gemini 4 Argon 76.0%, GPT-5.6 Sol 69.7%.

Which is better for coding?

There are no published SWE-bench Verified results for Gemini 4 Argon and GPT-5.6 Sol yet, so there is no like-for-like coding score. On overall capability, Gemini 4 Argon 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 4 Argon 1,048,576 and GPT-5.6 Sol 1,050,000 tokens. Maximum output per response: Gemini 4 Argon up to 65,536, GPT-5.6 Sol up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Gemini 4 Argon accepts text, images, PDFs, audio and video; GPT-5.6 Sol accepts text, images and PDFs. Gemini 4 Argon handles the widest range of inputs.

Are any of these open source?

No. Gemini 4 Argon and GPT-5.6 Sol are proprietary and only available through APIs and apps.

Which is newer?

Gemini 4 Argon is the newest, released Oct 13, 2026. GPT-5.6 Sol came out Jul 9, 2026. Knowledge cutoff: Gemini 4 Argon Mar 2026, GPT-5.6 Sol Feb 16, 2026.

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

Related comparisons