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Comparison · 2 models · Updated Nov 2, 2026

Grok 4 Fast Non Reasoning vs Mistral Small 4

Grok 4 Fast Non Reasoning comes out ahead, 72 to 65 on our weighted score.

  1. Our pick

    xAI

    Grok 4 Fast Non Reasoning

    Released Dec 18, 2025

    72/100
    • ECI—
    • Price$0.20 / $0.50
    • Context2M
    Full specs Remove Grok 4 Fast Non Reasoning

  2. Mistral AI

    Mistral Small 4

    Released Mar 16, 2026

    65/100
    • ECI—
    • Price$0.15 / $0.60
    • Context256K
    Full specs Remove Mistral Small 4

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Grok 4 Fast Non Reasoning is our pick

Grok 4 Fast Non Reasoning is the better all-round choice, scoring 72/100 against Mistral Small 4 (65). 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 priceMistral Small 4Mistral Small 4 $0.263 · Grok 4 Fast Non Reasoning $0.275 per 1M tokens (3:1 blend)
  • Longest contextGrok 4 Fast Non ReasoningGrok 4 Fast Non Reasoning 2,000,000 · Mistral Small 4 256,000 tokens
  • Widest inputsGrok 4 Fast Non ReasoningGrok 4 Fast Non Reasoning: Text, Images, Audio, Video · Mistral Small 4: Text, Images
  • Self-hostingMistral Small 4Publishes downloadable weights
How the score is built
MeasureWeightGrok 4 Fast Non ReasoningMistral Small 4
Price50%7374
Inputs & features30%7070
Context window20%7236
Overall100%72/10065/100

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 Fast Non Reasoning vs Mistral Small 4 specifications side by side
SpecificationGrok 4 Fast Non ReasoningxAIMistral Small 4Mistral AI
Capability
Capabilities Index (ECI)——
ECI rank——
Price per million tokens
Input$0.20$0.15 (best)
Output$0.50 (best)$0.60
Cached input—$0.015
Blended (3:1)$0.275$0.263 (best)
Long-context rateSame rateSame rate
Price sourceMedian of 7 providersOfficial Mistral API
Limits
Context window2,000,000 tokens (best)256,000 tokens
Max output2,000,000 tokens (best)256,000 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsNoNo
AudioYesNo
VideoYesNo
ReasoningNoYeshigh
Tool callingYesYes
Structured outputNoYes
Availability
WeightsProprietaryOpen
API model ID—mistral-small-2603
API providers821 (best)
ReleasedDec 18, 2025Mar 16, 2026
Knowledge cutoff—Jun 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 Fast Non Reasoning$3.00
  • Mistral Small 4$2.70
04 — Questions

Which should you choose?

Which is better: Grok 4 Fast Non Reasoning or Mistral Small 4?

Grok 4 Fast Non Reasoning is the better all-round choice, scoring 72/100 against Mistral Small 4 (65). 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 Fast Non Reasoning or Mistral Small 4?

Mistral Small 4 is cheaper at $0.15 input / $0.60 output per million tokens (official Mistral API price). Grok 4 Fast Non Reasoning costs $0.20 input / $0.50 output per million tokens (median across 7 API providers). At a typical mix of three input tokens to one output token, that is $0.263 per million tokens for Mistral Small 4 versus $0.275 for Grok 4 Fast Non Reasoning (1× as much).

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Grok 4 Fast Non Reasoning has not been scored yet and Mistral Small 4 has not been scored yet.

Which is better for coding?

There are no published SWE-bench Verified results for Grok 4 Fast Non Reasoning and Mistral Small 4 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 Fast Non Reasoning has the largest context window at 2,000,000 tokens, against 256,000 for Mistral Small 4. Maximum output per response: Grok 4 Fast Non Reasoning up to 2,000,000, Mistral Small 4 up to 256,000 tokens.

Which can read images, PDFs, audio or video?

Grok 4 Fast Non Reasoning accepts text, images, audio and video; Mistral Small 4 accepts text and images. Grok 4 Fast Non Reasoning handles the widest range of inputs.

Are any of these open source?

Mistral Small 4 publishes its weights and can be self-hosted; Grok 4 Fast Non Reasoning is proprietary.

Which is newer?

Mistral Small 4 is the newest, released Mar 16, 2026. Grok 4 Fast Non Reasoning came out Dec 18, 2025. Knowledge cutoff: Mistral Small 4 Jun 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 Nov 2, 2026.

05 — Keep comparing

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