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GPT-5.1-Codex vs Qwen3.5

OpenAI vs Alibaba — benchmarks, pricing, and capabilities side by side.

  • GPT-5.1-Codex has a larger context window (400K)
GPT-5.1-CodexQwen3.5
Intelligence index88.2
DeveloperOpenAIAlibaba
TypeMultimodalMultimodal
AccessAPI onlyOpen weights
Context window400,000 tokens262,144 tokens
Input price$1.25 / 1M
Output price$10.00 / 1M
Speed188 tok/s
ReleasedNovember 13, 2025February 16, 2026
Parameters397B (17B active)
Input modalitiesText, ImageText, Image, Video
Output modalitiesTextText