5 models
Ranked by Design Arena: website
Reasoning Tools Open weights 1248.0

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 JSON Open weights 1149.0

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
Tools JSON Open weights 1107.0

September 2025 Kimi K2 instruction update with a 256K context and improved agentic coding

moonshotai/kimi-k2-0905 2025-09-05 262.144K context $0.6/M input $2.5/M output
8 providers
Reasoning Tools JSON 1036.0

Deliberate o-series reasoner for hard math, coding, and multi-step analysis

openai/o3 2025-04-16 200K context $2/M input $8/M output
23 providers
Reasoning Tools JSON 985.0

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