10 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
Reasoning Tools JSON 81.3

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 Open weights 74.2

DeepSeek reasoning model for multi-step analysis, math, coding, and tools

deepseek/deepseek-reasoner 2025-12-01 1M context $0.242/M input $0.726/M output
5 providers
Reasoning Tools JSON 72.0

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
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 JSON 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 JSON 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
Reasoning Open weights 56.9

Classic open reasoning model for transparent math, coding, and deliberate problem solving

deepseek/deepseek-r1 2025-01-20 128K context $0.58/M input $2.319/M output
16 providers
Tools JSON Open weights 12.0

Cohere command model for multilingual enterprise agents, tools, and chat

cohere/command-a-03-2025 2025-03-13 256K context $2.5/M input $10/M output
6 providers