Quick Summary
Anthropic
Creator of Claude AI models with advanced reasoning capabilities
- 200K context window
- Image understanding
- Tool/function calling
OpenAI Codex
GPT models with broad capabilities and wide ecosystem support
- 128K context window
- Image generation and understanding
- Tool/function calling
Model Comparison
| Aspect | Anthropic | OpenAI Codex |
|---|---|---|
| Number of Models | 2 | 2 |
| Default Model | Claude Sonnet 4 | GPT-5.2 |
| Max Context Window | 200K tokens | 128K tokens |
| Image Support | ✓ Yes | ✓ Yes |
| Tool/Function Calling | ✓ Yes | ✓ Yes |
| Pricing Model |
Authentication
Anthropic
api_key
Standard API key authentication
ANTHROPIC_API_KEY oauth
OAuth for Claude subscriptions
OpenAI Codex
api_key
Standard API key authentication
OPENAI_API_KEY oauth
OAuth for ChatGPT/Codex subscriptions
Pros & Cons
Anthropic
Pros
- Excellent at following complex instructions
- Strong reasoning and coding abilities
- Large context window
- Good safety alignment
Cons
- Higher cost than some alternatives
- Rate limits on free tier
- No fine-tuning available
OpenAI Codex
Pros
- Extensive ecosystem and tooling
- Good performance across tasks
- Fine-tuning options
- Strong developer community
Cons
- Can be expensive at scale
- Rate limits vary by tier
- Model updates can change behavior
Best Use Cases
Choose Anthropic if you need:
- Complex coding tasks
- Document analysis
- Creative writing
- Research assistance
Choose OpenAI Codex if you need:
- General AI assistance
- Image generation
- Code generation
- Content creation
Use with Messaging Channels
Both providers work with all OpenClaw messaging channels:
Telegram
Discord
Slack
Signal
iMessage
Frequently Asked Questions
Which is better, Anthropic or OpenAI Codex?
It depends on your use case. Anthropic excels at complex coding tasks, while OpenAI Codex is best for general ai assistance. Consider your specific needs for context length, pricing, and feature requirements.
Can I use both Anthropic and OpenAI Codex with OpenClaw?
Yes! OpenClaw supports multiple providers simultaneously. You can configure Anthropic as your primary and OpenAI Codex as a fallback, or use different providers for different agents.
Which has better pricing, Anthropic or OpenAI Codex?
Anthropic uses undefined pricing, while OpenAI Codex uses undefined. The best value depends on your usage volume and whether you need premium features.