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Comparison · 2 models · Updated Nov 2, 2026

Grok 4.20 (Non-Reasoning) vs Grok Build 0.1

Too close to call on our weighted score (Grok Build 0.1 53, Grok 4.20 (Non-Reasoning) 52). The right pick depends on what you value most.

  1. xAI

    Grok 4.20 (Non-Reasoning)

    Released Mar 9, 2026

    52/100
    • ECI—
    • Price$1.25 / $2.50
    • Context1M
    Full specs Remove Grok 4.20 (Non-Reasoning)

  2. xAI

    Grok Build 0.1

    Released Apr 16, 2026

    53/100
    • ECI—
    • Price$1.00 / $2.00
    • Context256K
    Full specs Remove Grok Build 0.1

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Too close to call

It is close. Our weighted score puts them within a point (Grok Build 0.1 53/100, Grok 4.20 (Non-Reasoning) 52/100), so choose by what matters most for your work: Grok Build 0.1 on price and Grok 4.20 (Non-Reasoning) for long inputs. 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 priceGrok Build 0.1Grok Build 0.1 $1.25 · Grok 4.20 (Non-Reasoning) $1.56 per 1M tokens (3:1 blend)
  • Longest contextGrok 4.20 (Non-Reasoning)Grok 4.20 (Non-Reasoning) 1,000,000 · Grok Build 0.1 256,000 tokens
  • Widest inputsSame inputsGrok 4.20 (Non-Reasoning): Text, Images, PDFs · Grok Build 0.1: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGrok 4.20 (Non-Reasoning)Grok Build 0.1
Price50%3943
Inputs & features30%7080
Context window20%6036
Overall100%52/10053/100

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.

Grok 4.20 (Non-Reasoning) vs Grok Build 0.1 specifications side by side
SpecificationGrok 4.20 (Non-Reasoning)xAIGrok Build 0.1xAI
Capability
Capabilities Index (ECI)——
ECI rank——
Price per million tokens
Input$1.25$1.00 (best)
Output$2.50$2.00 (best)
Cached input$0.20$0.20
Blended (3:1)$1.56$1.25 (best)
Long-context rateOver 200K: $2.50 / $5.00Over 200K: $2.00 / $4.00
Price sourceOfficial xAI APIOfficial xAI API
Limits
Context window1,000,000 tokens (best)256,000 tokens
Max output30,000 tokens256,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioNoNo
VideoNoNo
ReasoningNoYes
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgrok-4.20-0309-non-reasoninggrok-build-0.1
API providers1320 (best)
ReleasedMar 9, 2026Apr 16, 2026
Knowledge cutoff——
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.

  • Grok 4.20 (Non-Reasoning)$17.50
  • Grok Build 0.1$14.00
04 — Questions

Which should you choose?

Which is better: Grok 4.20 (Non-Reasoning) or Grok Build 0.1?

It is close. Our weighted score puts them within a point (Grok Build 0.1 53/100, Grok 4.20 (Non-Reasoning) 52/100), so choose by what matters most for your work: Grok Build 0.1 on price and Grok 4.20 (Non-Reasoning) for long inputs. 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, Grok 4.20 (Non-Reasoning) or Grok Build 0.1?

Grok Build 0.1 is cheaper at $1.00 input / $2.00 output per million tokens (official xAI API price). Grok 4.20 (Non-Reasoning) costs $1.25 input / $2.50 output per million tokens (official xAI API price). At a typical mix of three input tokens to one output token, that is $1.25 per million tokens for Grok Build 0.1 versus $1.56 for Grok 4.20 (Non-Reasoning) (1.3× as much).

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Grok 4.20 (Non-Reasoning) has not been scored yet and Grok Build 0.1 has not been scored yet.

Which is better for coding?

There are no published SWE-bench Verified results for Grok 4.20 (Non-Reasoning) and Grok Build 0.1 yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.

Which has the bigger context window?

Grok 4.20 (Non-Reasoning) has the largest context window at 1,000,000 tokens, against 256,000 for Grok Build 0.1. Maximum output per response: Grok 4.20 (Non-Reasoning) up to 30,000, Grok Build 0.1 up to 256,000 tokens.

Which can read images, PDFs, audio or video?

Grok 4.20 (Non-Reasoning) accepts text, images and PDFs; Grok Build 0.1 accepts text, images and PDFs. They handle the same number of input types.

Are any of these open source?

No. Grok 4.20 (Non-Reasoning) and Grok Build 0.1 are proprietary and only available through APIs and apps.

Which is newer?

Grok Build 0.1 is the newest, released Apr 16, 2026. Grok 4.20 (Non-Reasoning) came out Mar 9, 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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