Claude Fable 5.1 vs Kimi K3: Specs & Benchmark Comparison
| Characteristic | Claude Fable 5.1 | Kimi K3 |
|---|---|---|
| Company | Anthropic | Moonshot AI |
| Release Date | September 1, 2026 | July 16, 2026 |
| Parameters | — | 2.8T |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 128K | 1.0M |
| Input Price / 1M | $10.00 | $3.00 |
| Output Price / 1M | $50.00 | $15.00 |
| Average Score | 0.6 | 1.0 |
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, Kimi K3 — 1.0.
API Cost
Kimi K3 is 3.3x cheaper: input $3.00/1M vs $10.00/1M tokens.
Context Window
Claude Fable 5.1 supports a larger context: 1M vs 1M tokens.
Recency
Claude Fable 5.1 is newer: released 9/1/2026 vs 7/16/2026.
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Frequently Asked Questions
Which is better for coding — Claude Fable 5.1 or Kimi K3?
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 Kimi K3?
Kimi K3 is cheaper for input: $3.00 per 1M tokens vs $10.00.
Which has a larger context window — Claude Fable 5.1 or Kimi K3?
Claude Fable 5.1 supports a larger context: 1,048,576 tokens vs 1,000,000.
The Claude Fable 5.1 and Kimi K3 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 Kimi K3 page. See also the complete list of AI model comparisons.