OpenAI Codex

Claude Code

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Anthropic's terminal-based AI coding agent with 80.9% SWE-bench, Agent Teams, and GitHub Actions

Claude Code is Anthropic's terminal-first coding agent (GA since May 2025) that lives in your terminal and handles full development workflows. Powered by Claude Opus 4.6 which holds the SWE-bench Verified record at 80.9%, it plans and executes multi-file edits, runs tests, debugs errors, and manages git workflows. Agent Teams enable multiple Claude Code instances to collaborate on complex tasks. It integrates with VS Code and JetBrains IDEs via extensions, and supports GitHub Actions for automated code review, issue resolution, and PR creation.

• ●Terminal-based AI agent (GA since May 2025) for full development workflows
• ●80.9% SWE-bench Verified: highest autonomous coding benchmark score
• ●Agent Teams: multiple Claude Code instances collaborate on complex tasks

OpenAI API

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API access to GPT-5.2, Codex models, Responses API, Agents SDK, and the full OpenAI platform

The OpenAI API provides pay-per-use access to the GPT-5 family (GPT-5.2 flagship at $1.75/$14 per MTok, GPT-5 at $1.25/$10, GPT-5 Mini at $0.25/$2, GPT-5 Nano at $0.05/$0.40), Codex-oriented models for agentic coding, reasoning models (o3, o4-mini), and GPT-4.1 with 1M token context. The Responses API (launched March 2025) replaces the older Assistants API with built-in tools including web_search, file_search, and computer_use. The Agents SDK provides a Python framework for building multi-agent systems with handoffs, guardrails, and tracing. Also includes image generation (DALL-E), audio (TTS/STT), embeddings, and the Sora 2 video generation API.

• ●GPT-5.2 flagship (71.8% SWE-bench), GPT-5, GPT-4.1 (1M context), o3/o4-mini reasoning
• ●Responses API with built-in web_search, file_search, and computer_use tools
• ●Agents SDK: Python framework for multi-agent systems with handoffs and guardrails

Aider

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Open-source terminal pair programmer with git-native workflows

Aider is an open-source AI pair programming tool that runs in the terminal and keeps your workflow inside git. It can automatically create commits, apply diff-based edits across multiple files, and map your repository for large projects. Aider is model-flexible: you can use current OpenAI, Anthropic, Google, DeepSeek, and local model stacks through direct APIs, OpenRouter, Ollama, or compatible endpoints.

• ●Automatic git commits with descriptive messages
• ●Diff-based, multi-file editing directly in the terminal
• ●Works with current frontier model families (OpenAI, Anthropic, Gemini) plus DeepSeek and local models