Claude Fable 5.1 vs Claude Haiku 5.5
Compare Claude Fable 5.1 vs Claude Haiku 5.5 API pricing, token costs, context windows, and latency. See which model is cheaper and better for your stack.
Claude Fable 5.1 charges $10.00/1M input and $50.00/1M output tokens, compared to Claude Haiku 5.5 at $0.10/1M input and $0.50/1M output. Claude Haiku 5.5 is 100.0x cheaper on input tokens. In reasoning benchmarks, Claude Fable 5.1 holds the higher AA Intelligence Index rating (49/100). For latency-critical streaming, Claude Fable 5.1 delivers 88 t/s (155.0s TTFT) while Claude Haiku 5.5 provides 256 t/s (186.0s TTFT).
Full Metric & Specification Comparison
| Metric | Claude Fable 5.1 | Claude Haiku 5.5 | Advantage |
|---|---|---|---|
| Provider | Anthropic | Anthropic | - |
| Input Token Cost (1M) | $10.000 | $0.100 | Claude Haiku 5.5 |
| Output Token Cost (1M) | $50.000 | $0.500 | Claude Haiku 5.5 |
| Context Window | 1,000k tokens | 1,000k tokens | Tie |
| AA Intelligence Index | 49/100 | 36/100 | Claude Fable 5.1 |
| Streaming Latency | Moderate | Ultra-Fast | - |
Key Architectural Takeaways
- Input Token Cost: Claude Fable 5.1 is $10.00/1M vs Claude Haiku 5.5 at $0.10/1M
- Output Token Cost: Claude Fable 5.1 is $50.00/1M vs Claude Haiku 5.5 at $0.50/1M
- Context Window: Claude Fable 5.1 supports 1,000k tokens vs Claude Haiku 5.5 with 1,000k tokens
- Benchmark Intelligence Rating: Claude Fable 5.1 scores 49/100 vs Claude Haiku 5.5 at 36/100 (AA Index v5)
- Inference Latency: Claude Fable 5.1 is rated Moderate vs Claude Haiku 5.5 rated Ultra-Fast
Calculate Your Team's Exact Bill Difference
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Deploying Claude Haiku 5.5 over Claude Fable 5.1 saves $519.75/mo ($6237/yr) at this volume.
Frequently Asked Questions
Is Claude Fable 5.1 cheaper than Claude Haiku 5.5?
Claude Haiku 5.5 is significantly more economical, charging $0.10/1M input compared to $10.00/1M for Claude Fable 5.1.
Which model should I choose for production?
If your primary constraint is API cost and high query throughput, choose Claude Haiku 5.5. If you require peak reasoning accuracy and complex tool use, Claude Fable 5.1 is recommended.
How does context window compare between Claude Fable 5.1 and Claude Haiku 5.5?
Claude Fable 5.1 offers the larger context window (1,000k tokens), allowing you to pass significantly larger codebases or documents without chunking.
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