Claude Fable 5.1 vs DeepSeek V4 Pro 0813
Claude Fable 5.1 vs DeepSeek V4 Pro 0813: which AI model is cheaper, has the larger context window and more capabilities? Side-by-side comparison updated daily.
Quick verdict
- DeepSeek V4 Pro 0813 is 20× cheaper than Claude Fable 5.1 for the same mix of input and output tokens.
- DeepSeek V4 Pro 0813 has the larger context window (1M), useful for long documents and big codebases.
- Claude Fable 5.1 is the more recent release (Sep 1, 2026).
- Only DeepSeek V4 Pro 0813 has openly published weights you can run yourself.
- Only Claude Fable 5.1 accepts images as input.
- Claude Fable 5.1 scores higher on independent tests (overall index 165.0 vs 155.4).
- Choose DeepSeek V4 Pro 0813 if cost matters most; choose Claude Fable 5.1 if you need its specific strengths above. For the best results, test both on your own prompts.
| Claude Fable 5.1 | DeepSeek V4 Pro 0813 | |
|---|---|---|
| Company | Anthropic | DeepSeek |
| Released | Sep 1, 2026 ● | Aug 12, 2026 |
| Overall index | 165.0 ● | 155.4 |
| SWE-bench Verified | — | 77.6% |
| GPQA Diamond | — | 91.7% |
| AIME math | 100% ● | 98.6% |
| FrontierMath | 90.2% ● | 64.6% |
| SimpleQA Verified | 70.8% ● | 52.9% |
| Input (per 1M tokens) | $10 | $0.66 ● |
| Output (per 1M tokens) | $50 | $1.98 ● |
| Cost for 1M input + 1M output tokens | $60.00 | $2.64 ● |
| Providers | 4 | 20 ● |
| Context | 1M | 1M ● |
| Max output | 128K | 384K ● |
| Inputs | Text, Image, Files ● | Text |
| Outputs | Text | Text |
| Reasoning | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Open weights | — | ✓ |