3 models
Ranked by Design Arena: 3d
Reasoning Tools JSON Open weights 1202.0

Earlier Kimi frontier model for long-context agents, coding, and multimodal work

moonshotai/kimi-k2.5 2026-01-27 262.144K context $0.375/M input $2/M output
47 providers
Reasoning Tools Open weights 1108.0

May 2025 DeepSeek R1 update with improved mathematics, coding, and reasoning

deepseek/deepseek-r1-0528 2025-05-28 163.84K context $0.2/M input $0.8/M output
10 providers
Reasoning Tools 851.0

Fast o-series model for compact reasoning, coding, and tool use

openai/o4-mini 2025-04-16 200K context $1.1/M input $4.4/M output
22 providers