Gemma 3 27B vs GPT-5.1 Codex
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemma 3 27B by Google wins on 4 of 7 benchmarks against GPT-5.1 Codex by OpenAI, which leads on 3. 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 Gemma 3 27B's 1339.
Context: In context, GPT-5.1 Codex scores 400K on Context Length compared to Gemma 3 27B's 131K.
Pricing Comparison
Gemma 3 27B costs $0.08/1M input tokens and $0.45/1M output tokens, while GPT-5.1 Codex costs $1.3/1M input and $10.0/1M output. Gemma 3 27B is the more affordable option for API usage.
Speed Comparison
Gemma 3 27B generates output at 58 tok/s compared to GPT-5.1 Codex's 85 tok/s, and the time to first token is 390 ms for Gemma 3 27B versus 400 ms for GPT-5.1 Codex. GPT-5.1 Codex delivers faster throughput.
Verdict
For developers prioritizing affordability, Gemma 3 27B has the edge. For those who value general intelligence and speed, GPT-5.1 Codex is the stronger choice.
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Gemma 3 27B vs GPT-5.1 Codex — FAQ
Which is better, Gemma 3 27B or GPT-5.1 Codex?
Gemma 3 27B wins on more benchmarks overall (4 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemma 3 27B compare to GPT-5.1 Codex for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Gemma 3 27B cheaper than GPT-5.1 Codex?
Yes, Gemma 3 27B is cheaper. Gemma 3 27B costs $0.08/1M input and $0.45/1M output tokens. GPT-5.1 Codex costs $1.3/1M input and $10.0/1M output tokens.
Which is faster, Gemma 3 27B or GPT-5.1 Codex?
GPT-5.1 Codex is faster, generating output at 85 tok/s compared to 58 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemma 3 27B vs GPT-5.1 Codex comparison cover?
This comparison covers 7 benchmarks including Chatbot Arena ELO, Output Speed, Time to First Token, Input Cost, Output Cost, Context Length, Cached Input Cost. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.