GPT-5.1 Codex vs Pixtral Large
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.1 Codex by OpenAI wins on 12 of 14 benchmarks against Pixtral Large by Mistral, which leads on 1. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, GPT-5.1 Codex scores 1395 on Chatbot Arena ELO compared to Pixtral Large's 1270, while GPT-5.1 Codex scores 82.0% on MMLU-Pro compared to Pixtral Large's 70.0%.
Coding: In coding, GPT-5.1 Codex scores 96.0% on HumanEval+ compared to Pixtral Large's 80.0%, while GPT-5.1 Codex scores 78.0% on SWE-bench Verified compared to Pixtral Large's 35.0%, while GPT-5.1 Codex scores 85.0% on LiveCodeBench compared to Pixtral Large's 40.0%.
Math: In math, GPT-5.1 Codex scores 85.0% on MATH compared to Pixtral Large's 74.0%, while GPT-5.1 Codex scores 95.0% on GSM8K compared to Pixtral Large's 90.0%.
Reasoning: In reasoning, GPT-5.1 Codex scores 65.0% on GPQA Diamond compared to Pixtral Large's 48.0%, while GPT-5.1 Codex scores 52.0% on ARC-AGI compared to Pixtral Large's 22.0%.
Context: In context, GPT-5.1 Codex scores 400K on Context Length compared to Pixtral Large's 131K.
Pricing Comparison
GPT-5.1 Codex costs $1.3/1M input tokens and $10.0/1M output tokens, while Pixtral Large costs $2.0/1M input and $6.0/1M output. GPT-5.1 Codex is the more affordable option for API usage.
Speed Comparison
GPT-5.1 Codex generates output at 85 tok/s compared to Pixtral Large's 60 tok/s, and the time to first token is 400 ms for GPT-5.1 Codex versus 400 ms for Pixtral Large. GPT-5.1 Codex delivers faster throughput.
Verdict
GPT-5.1 Codex leads across the board in coding, general intelligence, math, affordability, speed, making it the stronger overall choice in this comparison.
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GPT-5.1 Codex vs Pixtral Large — FAQ
Which is better, GPT-5.1 Codex or Pixtral Large?
GPT-5.1 Codex wins on more benchmarks overall (12 vs 1). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5.1 Codex compare to Pixtral Large for coding?
GPT-5.1 Codex is better for coding, scoring 78.0% on SWE-bench Verified compared to 35.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is GPT-5.1 Codex cheaper than Pixtral Large?
Yes, GPT-5.1 Codex is cheaper. GPT-5.1 Codex costs $1.3/1M input and $10.0/1M output tokens. Pixtral Large costs $2.0/1M input and $6.0/1M output tokens.
Which is faster, GPT-5.1 Codex or Pixtral Large?
GPT-5.1 Codex is faster, generating output at 85 tok/s compared to 60 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the GPT-5.1 Codex vs Pixtral Large comparison cover?
This comparison covers 14 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, GPQA Diamond, SWE-bench Verified, Output Speed, LiveCodeBench, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.