Claude Fable 5 vs Claude Haiku 5.5
Claude Fable 5 and Claude Haiku 5.5 are closely matched at 53.4 and 50.0 on the LLM Stats Score. Claude Haiku 5.5 is 100.0x cheaper per token.
Anthropic · Anthropic · Updated for 2026
Which is better?
Claude Fable 5 and Claude Haiku 5.5 are closely matched on the overall LLM Stats Score at 53.4 and 50.0.
In the 4 individual benchmarks reported for both models, Claude Fable 5 wins 4; this is a narrower head-to-head signal than the composite indexes.
On price, Claude Haiku 5.5 is roughly 100.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Fable 5
- you value its reported benchmark strengths — it wins 4 of 4 exact shared results
Choose Claude Haiku 5.5
- cost matters — it's about 100.0x cheaper per token
- you want the most recent training data — it shipped Oct 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
19 reported for Claude Fable 5 · 36 for Claude Haiku 5.5
Claude Fable 5 outperforms in 4 benchmarks (FrontierCode 1.1, HealthBench Professional, SWE-Bench Pro, Terminal-Bench 4.0), while Claude Haiku 5.5 is better at 0 benchmarks.
Claude Fable 5 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Fable 5 ($10.00/1M tokens) is 100.0x more expensive than Claude Haiku 5.5 ($0.10/1M tokens).
For output processing, Claude Fable 5 ($50.00/1M tokens) is 100.0x more expensive than Claude Haiku 5.5 ($0.50/1M tokens).
In conclusion, Claude Fable 5 is more expensive than Claude Haiku 5.5.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,000,000 tokens. Both models can generate responses up to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude Fable 5 and Claude Haiku 5.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Fable 5
Claude Haiku 5.5
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Fable 5 was released on 2026-06-09, while Claude Haiku 5.5 was released on 2026-10-07.
Claude Haiku 5.5 is 4 months newer than Claude Fable 5.
Jun 9, 2026
4 months ago
Oct 7, 2026
2 days ago
4mo newerKnowledge Cutoff
When training data ends
Claude Haiku 5.5 has a documented knowledge cutoff of 2026-06-01, while Claude Fable 5's cutoff date is not specified.
We can confirm Claude Haiku 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without Claude Fable 5's cutoff date.
—
Jun 2026
Provider Availability
Claude Fable 5 is available from Anthropic, DeepInfra. Claude Haiku 5.5 is available from Anthropic.
Claude Fable 5
Claude Haiku 5.5
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Fable 5 and Claude Haiku 5.5 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Fable 5 vs Claude Haiku 5.5.