Command R+ vs GPT-5.5 Pro

Head-to-head technical comparison of intelligence, capabilities, and API pricing.

Command R+

Cohere

AI Mastery Index81.8

LMSYS Arena1215

Technical (MMLU-Pro)82.3%

Cost per 1M Tokens$3

GPT-5.5 Pro

OpenAI

AI Mastery Index94.2

LMSYS Arena1350

Technical (MMLU-Pro)94.2%

Cost per 1M Tokens$30

Architect's Verdict

When comparing Command R+ and GPT-5.5 Pro, GPT-5.5 Pro edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, Command R+ offers a more economical API at $3 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.