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Comparison · 2 models · Updated Nov 2, 2026

Gemini 4 Argon vs Claude Sonnet 5.5

Too close to call on our weighted score (Gemini 4 Argon 74, Claude Sonnet 5.5 72). The right pick depends on what you value most.

  1. Google

    Gemini 4 Argon

    Released Oct 13, 2026

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

  2. Anthropic

    Claude Sonnet 5.5

    Released Sep 28, 2026

    72/100
    • ECI166.7
    • Price$2.00 / $10.00
    • Context1M
    Full specs Remove Claude Sonnet 5.5

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01 — Verdict

Too close to call

It is close. Our weighted score puts them within 3 points (Gemini 4 Argon 74/100, Claude Sonnet 5.5 72/100), so choose by what matters most for your work: Claude Sonnet 5.5 for raw capability, Gemini 4 Argon on price and Gemini 4 Argon for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityClaude Sonnet 5.5Capabilities Index (ECI): Claude Sonnet 5.5 166.7 · Gemini 4 Argon 166.1
  • Lowest priceSame priceGemini 4 Argon $4.00 · Claude Sonnet 5.5 $4.00 per 1M tokens (3:1 blend)
  • Longest contextGemini 4 ArgonGemini 4 Argon 1,048,576 · Claude Sonnet 5.5 1,000,000 tokens
  • Widest inputsGemini 4 ArgonGemini 4 Argon: Text, Images, PDFs, Audio, Video · Claude Sonnet 5.5: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGemini 4 ArgonClaude Sonnet 5.5
CapabilityCapabilities Index (ECI)50%9697
Price25%2020
Inputs & features15%10080
Context window10%6160
Overall100%74/10072/100
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 Claude Sonnet 5.5 specifications side by side
SpecificationGemini 4 ArgonGoogleClaude Sonnet 5.5Anthropic
Capability
Capabilities Index (ECI)166.1166.7 (best)
ECI rank#7 of 165#5 of 165 (best)
GPQA DiamondGraduate-level science questions96.4% (best)95.6%
FrontierMath Tiers 1–3Research-level mathematics86.0%88.8% (best)
OTIS Mock AIME 2024–2025Competition mathematics100%100%
SimpleQA VerifiedShort factual questions76.0% (best)46.5%
Price per million tokens
Input$2.00$2.00
Output$10.00$10.00
Cached input$0.10$0.10
Blended (3:1)$4.00$4.00
Long-context rateSame rateSame rate
Price sourceOfficial Google APIOfficial Anthropic API
Limits
Context window1,048,576 tokens (best)1,000,000 tokens
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-argonclaude-sonnet-5-5
API providers2434 (best)
ReleasedOct 13, 2026Sep 28, 2026
Knowledge cutoffMar 2026Jun 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
  • Claude Sonnet 5.5$40.00
04 — Questions

Which should you choose?

Which is better: Gemini 4 Argon or Claude Sonnet 5.5?

It is close. Our weighted score puts them within 3 points (Gemini 4 Argon 74/100, Claude Sonnet 5.5 72/100), so choose by what matters most for your work: Claude Sonnet 5.5 for raw capability, Gemini 4 Argon on price and Gemini 4 Argon for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Gemini 4 Argon or Claude Sonnet 5.5?

Gemini 4 Argon and Claude Sonnet 5.5 cost the same: $2.00 input / $10.00 output per million tokens.

Which scores higher on benchmarks?

Claude Sonnet 5.5 scores higher on the Capabilities Index (ECI): Claude Sonnet 5.5 166.7 (#5 of 165) and Gemini 4 Argon 166.1 (#7 of 165). The confidence ranges of the top two overlap (163.6–171.3 vs 163.1–170.3), so treat the gap as small. On individual benchmarks: GPQA Diamond — Gemini 4 Argon 96.4%, Claude Sonnet 5.5 95.6%; FrontierMath Tiers 1–3 — Claude Sonnet 5.5 88.8%, Gemini 4 Argon 86.0%; OTIS Mock AIME 2024–2025 — Gemini 4 Argon 100%, Claude Sonnet 5.5 100%; SimpleQA Verified — Gemini 4 Argon 76.0%, Claude Sonnet 5.5 46.5%.

Which is better for coding?

There are no published SWE-bench Verified results for Gemini 4 Argon and Claude Sonnet 5.5 yet, so there is no like-for-like coding score. On overall capability, Claude Sonnet 5.5 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?

Gemini 4 Argon has the largest context window at 1,048,576 tokens, against 1,000,000 for Claude Sonnet 5.5. Maximum output per response: Gemini 4 Argon up to 65,536, Claude Sonnet 5.5 up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Gemini 4 Argon accepts text, images, PDFs, audio and video; Claude Sonnet 5.5 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 Claude Sonnet 5.5 are proprietary and only available through APIs and apps.

Which is newer?

Gemini 4 Argon is the newest, released Oct 13, 2026. Claude Sonnet 5.5 came out Sep 28, 2026. Knowledge cutoff: Gemini 4 Argon Mar 2026, Claude Sonnet 5.5 Jun 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

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