Detailed comparison of capabilities, features, and performance.
| Feature | GPT-5.2 Codex | Claude 3.5 Haiku |
|---|---|---|
| AI Lab | OpenAI | Anthropic |
| Context Size | 400,000 tokens | 204,800 tokens |
| Max Output Size | 128,000 tokens | 4,096 tokens |
| Frontier Model | Yes | No |
| Vision Support | Yes | No |
| Description | OpenAI's coding-optimized model built on GPT-5.2. Designed for agentic coding tasks including building projects from scratch, feature development, debugging, large-scale refactoring, and code review. Supports multimodal inputs for UI development. | The latest Haiku 3.5 model from Anthropic |
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View model details →Access both GPT-5.2 Codex and Claude 3.5 Haiku in a single workspace without managing multiple API keys.
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