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Comparison · 2 models · Updated Oct 4, 2026

Gemma 4 31B IT vs Grok 4.6

Gemma 4 31B IT comes out ahead, 69 to 65 on our weighted score, and it is the cheaper option too.

  1. Our pick

    Google

    Gemma 4 31B IT

    Released Apr 2, 2026

    69/100
    • ECI142.8
    • Price$0.14 / $0.40
    • Context262K
    Full specs Remove Gemma 4 31B IT

  2. xAI

    Grok 4.6

    Released Aug 12, 2026

    65/100
    • ECI156.6
    • Price$2.00 / $6.00
    • Context500K
    Full specs Remove Grok 4.6

  3. Add a model

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01 — Verdict

Gemma 4 31B IT is our pick

Gemma 4 31B IT is the better all-round choice, scoring 69/100 against Grok 4.6 (65). It leads on price. Grok 4.6 wins on capability and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGrok 4.6Capabilities Index (ECI): Grok 4.6 156.6 · Gemma 4 31B IT 142.8
  • Lowest priceGemma 4 31B ITGemma 4 31B IT $0.205 · Grok 4.6 $3.00 per 1M tokens (3:1 blend)
  • Longest contextGrok 4.6Grok 4.6 500,000 · Gemma 4 31B IT 262,144 tokens
  • Widest inputsSame inputsGemma 4 31B IT: Text, Images · Grok 4.6: Text, Images
  • Self-hostingGemma 4 31B ITPublishes downloadable weights
How the score is built
MeasureWeightGemma 4 31B ITGrok 4.6
CapabilityCapabilities Index (ECI)50%6986
Price25%8327
Inputs & features15%7070
Context window10%3748
Overall100%69/10065/100
02 — Side by side

Every spec in one table

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

Gemma 4 31B IT vs Grok 4.6 specifications side by side
SpecificationGemma 4 31B ITGoogleGrok 4.6xAI
Capability
Capabilities Index (ECI)142.8156.6 (best)
ECI rank#86 of 148#19 of 148 (best)
GPQA DiamondGraduate-level science questions75.8%94.0% (best)
FrontierMath Tiers 1–3Research-level mathematics—66.0%
OTIS Mock AIME 2024–2025Competition mathematics73.3%99.2% (best)
SimpleQA VerifiedShort factual questions10.4%49.3% (best)
Price per million tokens
Input$0.14 (best)$2.00
Output$0.40 (best)$6.00
Cached input—$0.50
Blended (3:1)$0.205 (best)$3.00
Long-context rateSame rateOver 200K: $4.00 / $12.00
Price sourceMedian of 30 providersOfficial xAI API
Limits
Context window262,144 tokens500,000 tokens (best)
Max output32,768 tokens500,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsNoNo
AudioNoNo
VideoNoNo
ReasoningYesYeslow · medium · high · xhigh
Tool callingYesYes
Structured outputYesYes
Availability
WeightsOpenProprietary
API model IDgemma-4-31b-itgrok-4.6
API providers38 (best)29
ReleasedApr 2, 2026Aug 12, 2026
Knowledge cutoff—Feb 1, 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.

  • Gemma 4 31B IT$2.20
  • Grok 4.6$32.00
04 — Questions

Which should you choose?

Which is better: Gemma 4 31B IT or Grok 4.6?

Gemma 4 31B IT is the better all-round choice, scoring 69/100 against Grok 4.6 (65). It leads on price. Grok 4.6 wins on capability and context window. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Gemma 4 31B IT or Grok 4.6?

Gemma 4 31B IT is cheaper at $0.14 input / $0.40 output per million tokens (median across 30 API providers). Grok 4.6 costs $2.00 input / $6.00 output per million tokens (official xAI API price). At a typical mix of three input tokens to one output token, that is $0.205 per million tokens for Gemma 4 31B IT versus $3.00 for Grok 4.6 (15× as much).

Which scores higher on benchmarks?

Grok 4.6 scores higher on the Capabilities Index (ECI): Grok 4.6 156.6 (#19 of 148) and Gemma 4 31B IT 142.8 (#86 of 148). Their confidence ranges do not overlap (154.7–158.9 vs 140.3–144.9), so the gap is a real one. On individual benchmarks: GPQA Diamond — Grok 4.6 94.0%, Gemma 4 31B IT 75.8%; OTIS Mock AIME 2024–2025 — Grok 4.6 99.2%, Gemma 4 31B IT 73.3%; SimpleQA Verified — Grok 4.6 49.3%, Gemma 4 31B IT 10.4%.

Which is better for coding?

There are no published SWE-bench Verified results for Gemma 4 31B IT and Grok 4.6 yet, so there is no like-for-like coding score. On overall capability, Grok 4.6 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?

Grok 4.6 has the largest context window at 500,000 tokens, against 262,144 for Gemma 4 31B IT. Maximum output per response: Gemma 4 31B IT up to 32,768, Grok 4.6 up to 500,000 tokens.

Which can read images, PDFs, audio or video?

Gemma 4 31B IT accepts text and images; Grok 4.6 accepts text and images. They handle the same number of input types.

Are any of these open source?

Gemma 4 31B IT publishes its weights and can be self-hosted; Grok 4.6 is proprietary.

Which is newer?

Grok 4.6 is the newest, released Aug 12, 2026. Gemma 4 31B IT came out Apr 2, 2026. Knowledge cutoff: Grok 4.6 Feb 1, 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 Oct 4, 2026.

05 — Keep comparing

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