Claude Fable 5.1 vs Inkling-Small: Specs & Benchmark Comparison
| Characteristic | Claude Fable 5.1 | Inkling-Small |
|---|---|---|
| Company | Anthropic | Thinking Machines Lab |
| Release Date | September 1, 2026 | July 30, 2026 |
| Parameters | — | 276B |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 256K |
| Context (output) | 128K | 256K |
| Input Price / 1M | $10.00 | $0.30 |
| Output Price / 1M | $50.00 | $1.20 |
| Average Score | 0.6 | 0.6 |
| Benchmarks | ||
| Humanity's Last Exam | 0.7 | 0.3 |
| GDPval-AA | 0.6 | 0.4 |
Visual Benchmark Comparison
Claude Fable 5.1
Inkling-Small
Humanity's Last Exam0.7 vs 0.3
0.7
0.3
GDPval-AA0.6 vs 0.4
0.6
0.4
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, Inkling-Small — 0.6.
API Cost
Inkling-Small is 40.0x cheaper: input $0.30/1M 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 7/30/2026.
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Frequently Asked Questions
Which is better for coding — Claude Fable 5.1 or Inkling-Small?
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 Inkling-Small?
Inkling-Small is cheaper for input: $0.30 per 1M tokens vs $10.00.
Which has a larger context window — Claude Fable 5.1 or Inkling-Small?
Claude Fable 5.1 supports a larger context: 1,048,576 tokens vs 256,000.
The Claude Fable 5.1 and Inkling-Small 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 Inkling-Small page. See also the complete list of AI model comparisons.