Anthropic's upgraded Mythos-class flagship, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work.
DeepSeek's cost-efficient V4.1 tier and the first model built on the Causal Encoder-Decoder (CED) architecture: a 552B MoE activating 8B parameters on input and 16B on output.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Claude Fable 5.1 and DeepSeek V4.1 Flash 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 V4.1 Flash has a lower blended cost. Claude Fable 5.1: $10.00 input / $50.00 output. DeepSeek V4.1 Flash: $0.03 input / $0.50 output.
DeepSeek V4.1 Flash has a larger context window: Claude Fable 5.1 supports 1M tokens vs DeepSeek V4.1 Flash at 1M tokens.
Yes, both Claude Fable 5.1 and DeepSeek V4.1 Flash support vision/image input.
Key differences: DeepSeek V4.1 Flash is significantly cheaper. 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 Claude Fable 5.1 and DeepSeek V4.1 Flash for free on idapt.app to see which performs better for your specific needs.