Mistral AIMistral Small 4VSxAIGrok 4.20

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

We recommend Grok 4.20 if you need peak intelligence for complex complex codebases, multi-file repositories, and architectural planning, or the 11.4x cheaper Mistral Small 4 if your workflow is limited to scripting single-file apps or clearly defined functions. While Grok 4.20 holds a major reasoning advantage, Mistral Small 4 is optimized for high-volume budget pipelines. Choose Grok 4.20 for architectural codebase planning, or Mistral Small 4 to maximize your budget for basic scripts.

▶WHY?

Benchmark Calculations & Evidence:

Coding Evaluation: Mistral Small 4 was evaluated on LiveCodeBench (scoring 63.6%), while Grok 4.20 was evaluated on SWE-bench Pro (scoring 51.8%).

Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. Grok 4.20 scored 90%, while Mistral Small 4 scored 71.2%.

Cost Efficiency: Mistral Small 4 pricing ($0.15/M input, $0.6/M output) is 11.4x cheaper than Grok 4.20 ($2/M input, $6/M output).

Was this recommendation helpful?

Model Specs

Mistral Small 4

Open SourceAPI Available

Website 🤗HF

Benchmarks & Scores

Coding (live-code-bench)

63.6%

scripting single-file apps or clearly defined functions

Reasoning (gpqa-diamond)

71.2%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)11.4x cheaper

$0.26Input: $0.15 | Output: $0.60

Context Window

262.14k tokens

Model Specs

Grok 4.20

Website

Benchmarks & Scores

Coding (swe-bench-pro)

51.8%

complex codebases, multi-file repositories, and architectural planning

Reasoning (gpqa-diamond)Winner (+18.8%)

90%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)

$3.00Input: $2.00 | Output: $6.00

Context WindowLarger

1.05M tokens

Read our data collection methodology

Frequently Asked Questions about Mistral Small 4 vs Grok 4.20

Mistral Small 4 is cheaper than Grok 4.20. Mistral Small 4 has a blended cost of $0.26/1M tokens, which is about 11.4x cheaper than Grok 4.20 at $3.00/1M tokens.

For coding tasks, Mistral Small 4 scores 63.6% on live-code-bench (scripting single-file apps or clearly defined functions), while Grok 4.20 scores 51.8% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning).

Related Matchups

Explore similar comparisons for Mistral Small 4 and Grok 4.20.

Browse More Comparisons

Mistral AIMistral Small 4

Mistral AIMistral Small 4

OpenAIGPT-5.6 Terra

Compare Specs

Do you want to find a model for your constraints?

Use our interactive model finder to filter LLMs by reasoning capability, coding performance, cost, and context length.

Open Model Finder