OpenAI's original omni model supporting text and image inputs.
Anthropic's upgraded Mythos-class flagship, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 4o and Claude Fable 5.1 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.
GPT 4o has a lower blended cost. GPT 4o: $2.50 input / $10.00 output. Claude Fable 5.1: $10.00 input / $50.00 output.
Claude Fable 5.1 has a larger context window: GPT 4o supports 128K tokens vs Claude Fable 5.1 at 1M tokens.
Yes, both GPT 4o and Claude Fable 5.1 support vision/image input.
Key differences: GPT 4o is significantly cheaper; only Claude Fable 5.1 offers extended reasoning mode. Compare full specs on this page.
If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GPT 4o and Claude Fable 5.1 for free on idapt.app to see which performs better for your specific needs.