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Comparison · 2 models · Updated Oct 4, 2026

Grok 4.20 (Non-Reasoning) vs GPT-5.4 mini

Grok 4.20 (Non-Reasoning) comes out ahead, 53 to 49 on our weighted score, and it is the cheaper option too.

  1. Our pick

    xAI

    Grok 4.20 (Non-Reasoning)

    Released Mar 9, 2026

    53/100
    • ECI—
    • Price$1.25 / $2.50
    • Context1M
    Full specs Remove Grok 4.20 (Non-Reasoning)

  2. OpenAI

    GPT-5.4 mini

    Released Mar 17, 2026

    49/100
    • ECI148.8
    • Price$0.75 / $4.50
    • Context400K
    Full specs Remove GPT-5.4 mini

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Grok 4.20 (Non-Reasoning) is our pick

Grok 4.20 (Non-Reasoning) is the better all-round choice, scoring 53/100 against GPT-5.4 mini (49). 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 priceGrok 4.20 (Non-Reasoning)Grok 4.20 (Non-Reasoning) $1.56 · GPT-5.4 mini $1.69 per 1M tokens (3:1 blend)
  • Longest contextGrok 4.20 (Non-Reasoning)Grok 4.20 (Non-Reasoning) 1,000,000 · GPT-5.4 mini 400,000 tokens
  • Widest inputsGrok 4.20 (Non-Reasoning)Grok 4.20 (Non-Reasoning): Text, Images, PDFs · GPT-5.4 mini: Text, Images
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGrok 4.20 (Non-Reasoning)GPT-5.4 mini
Price50%4139
Inputs & features30%7070
Context window20%6044
Overall100%53/10049/100

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 GPT-5.4 mini specifications side by side
SpecificationGrok 4.20 (Non-Reasoning)xAIGPT-5.4 miniOpenAI
Capability
Capabilities Index (ECI)—148.8
ECI rank—#56 of 148
GPQA DiamondGraduate-level science questions—86.9%
FrontierMath Tiers 1–3Research-level mathematics—51.2%
OTIS Mock AIME 2024–2025Competition mathematics—88.9%
SimpleQA VerifiedShort factual questions—29.4%
Price per million tokens
Input$1.25$0.75 (best)
Output$2.50 (best)$4.50
Cached input$0.20$0.075 (best)
Blended (3:1)$1.56 (best)$1.69
Long-context rateOver 200K: $2.50 / $5.00Same rate
Price sourceOfficial xAI APIOfficial OpenAI API
Limits
Context window1,000,000 tokens (best)400,000 tokens
Max output30,000 tokens128,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesNo
AudioNoNo
VideoNoNo
ReasoningNoYeslow · medium · high · xhigh
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgrok-4.20-0309-non-reasoninggpt-5.4-mini
API providers1029 (best)
ReleasedMar 9, 2026Mar 17, 2026
Knowledge cutoff—Aug 31, 2025
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
  • GPT-5.4 mini$16.50
04 — Questions

Which should you choose?

Which is better: Grok 4.20 (Non-Reasoning) or GPT-5.4 mini?

Grok 4.20 (Non-Reasoning) is the better all-round choice, scoring 53/100 against GPT-5.4 mini (49). 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, Grok 4.20 (Non-Reasoning) or GPT-5.4 mini?

Grok 4.20 (Non-Reasoning) is cheaper at $1.25 input / $2.50 output per million tokens (official xAI API price). GPT-5.4 mini costs $0.75 input / $4.50 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $1.56 per million tokens for Grok 4.20 (Non-Reasoning) versus $1.69 for GPT-5.4 mini (1.1× 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 GPT-5.4 mini has an ECI of 148.8.

Which is better for coding?

There are no published SWE-bench Verified results for Grok 4.20 (Non-Reasoning) and GPT-5.4 mini 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 400,000 for GPT-5.4 mini. Maximum output per response: Grok 4.20 (Non-Reasoning) up to 30,000, GPT-5.4 mini up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Grok 4.20 (Non-Reasoning) accepts text, images and PDFs; GPT-5.4 mini accepts text and images. Grok 4.20 (Non-Reasoning) handles the widest range of inputs.

Are any of these open source?

No. Grok 4.20 (Non-Reasoning) and GPT-5.4 mini are proprietary and only available through APIs and apps.

Which is newer?

GPT-5.4 mini is the newest, released Mar 17, 2026. Grok 4.20 (Non-Reasoning) came out Mar 9, 2026. Knowledge cutoff: GPT-5.4 mini Aug 31, 2025.

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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