Open-source reasoning model matching OpenAI o1 performance.
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 DeepSeek R1 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.
DeepSeek R1 has a lower blended cost. DeepSeek R1: $0.70 input / $2.50 output. Claude Fable 5.1: $10.00 input / $50.00 output.
Claude Fable 5.1 has a larger context window: DeepSeek R1 supports 64K tokens vs Claude Fable 5.1 at 1M tokens.
Claude Fable 5.1 supports vision/image input, but DeepSeek R1 does not.
Key differences: DeepSeek R1 is significantly cheaper; only Claude Fable 5.1 supports vision input. 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 DeepSeek R1 and Claude Fable 5.1 for free on idapt.app to see which performs better for your specific needs.