GPT-5.1 Codex vs Qwen3.5 122B-A10B
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Qwen3.5 122B-A10B by Alibaba wins on 3 of 4 benchmarks against GPT-5.1 Codex by OpenAI, 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
Reasoning: In reasoning, Qwen3.5 122B-A10B scores 83.7% on GPQA Diamond compared to GPT-5.1 Codex's 65.0%.
Context: In context, GPT-5.1 Codex scores 400K on Context Length compared to Qwen3.5 122B-A10B's 262K.
Pricing Comparison
GPT-5.1 Codex costs $1.3/1M input tokens and $10.0/1M output tokens, while Qwen3.5 122B-A10B costs $0.26/1M input and $2.1/1M output. Qwen3.5 122B-A10B is the more affordable option for API usage.
Verdict
Qwen3.5 122B-A10B leads across the board in affordability, making it the stronger overall choice in this comparison.
View Individual Model Pages
GPT-5.1 Codex vs Qwen3.5 122B-A10B — FAQ
Which is better, GPT-5.1 Codex or Qwen3.5 122B-A10B?
Qwen3.5 122B-A10B wins on more benchmarks overall (3 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 Qwen3.5 122B-A10B for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is GPT-5.1 Codex cheaper than Qwen3.5 122B-A10B?
Yes, Qwen3.5 122B-A10B is cheaper. GPT-5.1 Codex costs $1.3/1M input and $10.0/1M output tokens. Qwen3.5 122B-A10B costs $0.26/1M input and $2.1/1M output tokens.
Which is faster, GPT-5.1 Codex or Qwen3.5 122B-A10B?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the GPT-5.1 Codex vs Qwen3.5 122B-A10B comparison cover?
This comparison covers 4 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.