3 models
Ranked by Terminal-Bench 2.1
Reasoning Tools JSON 84.7

Cost-efficient GPT-5.6 model for fast, high-volume workloads

openai/gpt-5.6-luna 2026-07-09 1.05M context $0.2/M input $1.2/M output
36 providers
Reasoning Tools JSON 83.3

xAI's Grok model for chat, coding, agentic tools, and lower hallucination risk

xai/grok-4.5 2026-07-08 500K context $2/M input $6/M output
26 providers
Reasoning Tools 70.8

Meituan LongCat-2.0, a reasoning model with tool calling and a 1M-token context window

meituan/longcat-2.0 2026-06-30 1M context $0.3/M input $1.2/M output
5 providers