Side-by-side pricing, context window, and capabilities — try both on ChatLima.
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
Software development and debugging
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...
Image and document understanding
| Feature | OpenAI: GPT-5.3-Codex | Anthropic: Claude Sonnet 4.6 |
|---|---|---|
| Provider | OpenRouter | OpenRouter |
| Context Length | 400,000 tokens | 1,000,000 tokens |
| Input Price | $1.75/M | $3.00/M |
| Output Price | $14.00/M | $15.00/M |
| Vision Support | Yes | Yes |
| Higher cost | Yes | Yes |
| Capabilities | TextVisionCoding | TextVision |