Claude Haiku 5.5 vs Muse Ember
Claude Haiku 5.5 and Muse Ember are closely matched at 49.0 and 45.9 on the LLM Stats Score. Claude Haiku 5.5 and Muse Ember cost the same.
Anthropic · Meta · Updated for 2026
Which is better?
Claude Haiku 5.5 and Muse Ember are closely matched on the overall LLM Stats Score at 49.0 and 45.9.
In the 3 individual benchmarks reported for both models, Claude Haiku 5.5 wins 2; this is a narrower head-to-head signal than the composite indexes.
Muse Ember also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Haiku 5.5
- you value its reported benchmark strengths — it wins 2 of 3 exact shared results
Choose Muse Ember
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Nov 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
36 reported for Claude Haiku 5.5 · 6 for Muse Ember
Claude Haiku 5.5 outperforms in 2 benchmarks (OSWorld 2.1 (partial), OSWorld 2.1 (strict)), while Muse Ember is better at 1 benchmark (Terminal-Bench 4.0).
Claude Haiku 5.5 shows notably better performance in the majority of benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Haiku 5.5 ($0.10/1M tokens) costs the same as Muse Ember ($0.10/1M tokens).
For output processing, Claude Haiku 5.5 ($0.50/1M tokens) costs the same as Muse Ember ($0.50/1M tokens).
In conclusion, Claude Haiku 5.5 and Muse Ember cost the same.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Muse Ember accepts 1,048,576 input tokens compared to Claude Haiku 5.5's 1,000,000 tokens. Muse Ember can generate longer responses up to 524,288 tokens, while Claude Haiku 5.5 is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude Haiku 5.5 and Muse Ember support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Haiku 5.5
Muse Ember
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 Haiku 5.5 was released on 2026-10-07, while Muse Ember was released on 2026-11-09.
Muse Ember is 1 month newer than Claude Haiku 5.5.
Oct 7, 2026
1 months ago
Nov 9, 2026
3 days ago
1mo newerKnowledge Cutoff
When training data ends
Claude Haiku 5.5 has a documented knowledge cutoff of 2026-06-01, while Muse Ember'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 Muse Ember's cutoff date.
Jun 2026
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Provider Availability
Claude Haiku 5.5 is available from Anthropic. Muse Ember is available from Meta Model API.
Claude Haiku 5.5
Muse Ember
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Haiku 5.5 and Muse Ember side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Haiku 5.5 vs Muse Ember.