Reasoning and chat alternatives

### OpenAI o3 / o4-mini

Strong reasoning models with tool use and agentic behavior.

### Google Gemini 2.5 Pro

Large context window and competitive benchmark scores.

### DeepSeek-V4

Lower cost reasoning model with strong math and coding results.

Coding agent alternatives

### Claude Code

Anthropic’s own terminal agent; obvious first-party extension.

### OpenAI Codex Agent

GitHub-integrated agent with broad language coverage.

### GitHub Copilot Workspace

Multi-file agentic workflows natively inside GitHub.

Local alternatives

### Qwen2.5 / Qwen3 via Ollama

Open-weight models with strong multilingual and coding performance.

### Llama 4

Meta’s latest open-weight model family for local deployment.

When to switch