Claude Fable 5.1 vs Sakana Namazu: Specs & Benchmark Comparison
| Characteristic | Claude Fable 5.1 | Sakana Namazu |
|---|---|---|
| Company | Anthropic | Sakana AI |
| Release Date | September 1, 2026 | August 3, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 256K |
| Context (output) | 128K | 256K |
| Input Price / 1M | $10.00 | $0.95 |
| Output Price / 1M | $50.00 | $4.00 |
| Average Score | 0.6 | 0.9 |
Verdict
Claude Fable 5.1 leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Fable 5.1 — 0.6, Sakana Namazu — 0.9.
API Cost
Sakana Namazu is 12.1x cheaper: input $0.95/1M vs $10.00/1M tokens.
Context Window
Claude Fable 5.1 supports a larger context: 1M vs 256K tokens.
Recency
Claude Fable 5.1 is newer: released 9/1/2026 vs 8/3/2026.
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Frequently Asked Questions
Which is better for coding — Claude Fable 5.1 or Sakana Namazu?
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 Sakana Namazu?
Sakana Namazu is cheaper for input: $0.95 per 1M tokens vs $10.00.
Which has a larger context window — Claude Fable 5.1 or Sakana Namazu?
Claude Fable 5.1 supports a larger context: 1,048,576 tokens vs 256,000.
The Claude Fable 5.1 and Sakana Namazu 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 Sakana Namazu page. See also the complete list of AI model comparisons.