GPT-5.1 Codex vs Llama 3.3 70B
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.1 Codex by OpenAI wins on 10 of 14 benchmarks against Llama 3.3 70B by Meta, which leads on 4. 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 Llama 3.3 70B's 1210, while GPT-5.1 Codex scores 82.0% on MMLU-Pro compared to Llama 3.3 70B's 60.0%.
Coding: In coding, GPT-5.1 Codex scores 96.0% on HumanEval+ compared to Llama 3.3 70B's 72.0%, while GPT-5.1 Codex scores 78.0% on SWE-bench Verified compared to Llama 3.3 70B's 22.0%, while GPT-5.1 Codex scores 85.0% on LiveCodeBench compared to Llama 3.3 70B's 26.0%.
Math: In math, GPT-5.1 Codex scores 85.0% on MATH compared to Llama 3.3 70B's 60.0%, while GPT-5.1 Codex scores 95.0% on GSM8K compared to Llama 3.3 70B's 82.0%.
Reasoning: In reasoning, GPT-5.1 Codex scores 65.0% on GPQA Diamond compared to Llama 3.3 70B's 34.0%, while GPT-5.1 Codex scores 52.0% on ARC-AGI compared to Llama 3.3 70B's 10.0%.
Context: In context, GPT-5.1 Codex scores 400K on Context Length compared to Llama 3.3 70B's 131K.
Pricing Comparison
GPT-5.1 Codex costs $1.3/1M input tokens and $10.0/1M output tokens, while Llama 3.3 70B costs $0.10/1M input and $0.32/1M output. Llama 3.3 70B is the more affordable option for API usage.
Speed Comparison
GPT-5.1 Codex generates output at 85 tok/s compared to Llama 3.3 70B's 90 tok/s, and the time to first token is 400 ms for GPT-5.1 Codex versus 300 ms for Llama 3.3 70B. Llama 3.3 70B delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and math, GPT-5.1 Codex has the edge. For those who value affordability and speed, Llama 3.3 70B is the stronger choice.
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GPT-5.1 Codex vs Llama 3.3 70B — FAQ
Which is better, GPT-5.1 Codex or Llama 3.3 70B?
GPT-5.1 Codex wins on more benchmarks overall (10 vs 4). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5.1 Codex compare to Llama 3.3 70B for coding?
GPT-5.1 Codex is better for coding, scoring 78.0% on SWE-bench Verified compared to 22.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is GPT-5.1 Codex cheaper than Llama 3.3 70B?
Yes, Llama 3.3 70B is cheaper. GPT-5.1 Codex costs $1.3/1M input and $10.0/1M output tokens. Llama 3.3 70B costs $0.10/1M input and $0.32/1M output tokens.
Which is faster, GPT-5.1 Codex or Llama 3.3 70B?
Llama 3.3 70B is faster, generating output at 90 tok/s compared to 85 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the GPT-5.1 Codex vs Llama 3.3 70B 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.