Claude Fable 5.1 vs Hy4 preview: Specs & Benchmark Comparison
| Characteristic | Claude Fable 5.1 | Hy4 preview |
|---|---|---|
| Company | Anthropic | Tencent |
| Release Date | September 1, 2026 | August 28, 2026 |
| Parameters | — | 770B |
| Multimodal | Yes | No |
| Context (input) | 1.0M | — |
| Context (output) | 128K | — |
| Input Price / 1M | $10.00 | — |
| Output Price / 1M | $50.00 | — |
| Average Score | 0.6 | 0.6 |
| Benchmarks | ||
| GDPval-AA | 0.6 | 0.6 |
| AutomationBench | 0.3 | 0.3 |
Visual Benchmark Comparison
Claude Fable 5.1
Hy4 preview
GDPval-AA0.6 vs 0.6
0.6
0.6
AutomationBench0.3 vs 0.3
0.3
0.3
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: Claude Fable 5.1 — 0.6, Hy4 preview — 0.6.
Recency
Both models were released around the same time: 9/1/2026 and 8/28/2026.
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Frequently Asked Questions
Which is better for coding — Claude Fable 5.1 or Hy4 preview?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Claude Fable 5.1 or Hy4 preview?
API pricing data is available on the individual model pages.
Which has a larger context window — Claude Fable 5.1 or Hy4 preview?
Context window data is available on the individual model pages.
The Claude Fable 5.1 and Hy4 preview comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Fable 5.1 or Hy4 preview page. See also the complete list of AI model comparisons.