4 models
Ranked by MathArena Apex
Reasoning Tools JSON Open weights 65.6

DeepSeek V4.1 Flash model for reasoning and agentic coding

deepseek/deepseek-v4.1-flash 2026-09-10 1M context $0.02/M input $1/M output
70 providers
Reasoning Tools Open weights 38.7

Tencent Hy reasoning model for coding, instruction following, and agent tasks

tencent/hy3 2026-07-06 256K context $0.066/M input $0.26/M output
23 providers
Reasoning Tools JSON Open weights 38.3

Open MoE flagship with million-token context for coding and long agent runs

deepseek/deepseek-v4-pro 2026-04-24 1M context $0.66/M input $1.98/M output
71 providers
Reasoning Tools JSON Open weights 33.0

Fast DeepSeek V4 lane for economical reasoning, coding, and long-context work

deepseek/deepseek-v4-flash 2026-04-24 1M context $0.15/M input $0.6/M output
68 providers