4 models
Ranked by Intelligence Index
Reasoning Tools JSON Open weights 43.7

StepFun's next-generation flagship base model for coding and professional knowledge work, with native text, image, and video input and a 1M-token context window

stepfun/step-5-preview 2026-09-16 1M context $1.046/M input $2.989/M output
17 providers
Reasoning Tools JSON Open weights 43.6

Multimodal Kimi model with 1M context and toggleable max-effort thinking for long-horizon agent work

moonshotai/kimi-k3 2026-07-16 1.04858M context $3/M input $15/M output
82 providers
Reasoning Tools JSON Open weights 27.0

Multimodal Kimi workhorse for agent loops, coding tasks, and visual context

moonshotai/kimi-k2.6 2026-04-20 262.144K context $0.95/M input $4/M output
69 providers
Reasoning Tools JSON Open weights 19.5

Newer StepFun flash model for faster agents, coding, and multimodal prompts

stepfun/step-3.7-flash 2026-05-29 256K context $0.202/M input $1.211/M output
21 providers