Anthropic's Mythos-class flagship for ambitious, long-running professional work.
Open-source 1.6T-parameter MoE with 49B active, built for advanced reasoning and long-horizon agents.
No shared agent demos for these models yet.
No captured outputs for these models yet.
Based on the Capability Index, Claude Fable 5 scores higher (91.6 vs 81.6). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
DeepSeek V4 Pro has a lower blended cost. Claude Fable 5: $10.00 input / $50.00 output. DeepSeek V4 Pro: $0.43 input / $0.87 output.
DeepSeek V4 Pro has a larger context window: Claude Fable 5 supports 1M tokens vs DeepSeek V4 Pro at 1M tokens.
Claude Fable 5 supports vision/image input, but DeepSeek V4 Pro does not.
Key differences: Claude Fable 5 has a notably higher capability index (10.0 point gap); DeepSeek V4 Pro is significantly cheaper; only Claude Fable 5 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 Claude Fable 5 and DeepSeek V4 Pro for free on idapt.app to see which performs better for your specific needs.