5 models
Ranked by Aider Polyglot
Reasoning Tools JSON 88.0

Original GPT-5 workhorse for reasoning, coding, writing, and tool workflows

openai/gpt-5 2025-08-07 400K context $1.25/M input $10/M output
34 providers
Reasoning Tools JSON 84.9

High-effort o3 tier for difficult technical reasoning and careful answers

openai/o3-pro 2025-06-10 200K context $20/M input $80/M output
9 providers
Tools Open weights 70.2

DeepSeek chat model for instruction following, coding, and analysis

deepseek/deepseek-chat 2025-12-01 1M context $0.15/M input $0.6/M output
8 providers
Reasoning Tools 61.7

O-series reasoning model for hard analysis, math, coding, and planning

openai/o1 2024-12-05 200K context $15/M input $60/M output
17 providers
Reasoning Tools 60.4

Smaller o-series reasoner for economical coding, math, and planning tasks

openai/o3-mini 2024-12-20 200K context $1.1/M input $4.4/M output
21 providers