Model vs model
Claude Haiku 5.5 vs Muse Ember
At a glance
Open or closed · can you download the model and run it yourself?
Where they sit among all 45 models
Claude Haiku 5.5 ranks 11th of the 40 models with an Intelligence Index. Up and to the left is smarter for less money. Hover or tap a dot for its numbers, then click it to compare that model with Claude Haiku 5.5.
How smart is each one?
Every intelligence score we have
Out of 100, higher is better. Claude Haiku 5.5 Muse Ember
Muse Ember has no Artificial Analysis scores yet, so only our own tests compare them.
Overall
Intelligence Index
43.4
By field of work
Finance & accounting
43.9Legal
42.3Healthcare & medicine
39.9Economics
51.2Engineering
44.9Strategy & operations
40.4
Benchmarks
Factual knowledge · SimpleQA
23.8Hard reasoning · Humanity's Last Exam
44.4Competition math · OTIS Mock AIME
98.9Research math · FrontierMath
75.1Scientific coding · SciCode
55Coding in Cursor · CursorBench 4.0
48.4Mergeable code · FrontierCode 2.0
27.7Terminal tasks · Terminal-Bench 4.0
32.8Long documents · AA-LCR
82.7
Our tests
Hallucination test · our test, higher means it made up less
92.5Muse Ember: not scored yet
The specs
| Spec | Claude Haiku 5.5 | Muse Ember |
|---|---|---|
| Input price | $0.10 per 1M | $0.10 per 1M |
| Output price | $0.50 per 1M | $0.50 per 1M |
| Cost per test task | $3.17 | $0.1531 |
| Context window | 1M | 1.05M |
| Max output | 128K | — |
| Accepts | Text, Image, PDF | Text, Image, PDF |
| Open weights | No | No |
| Lab | Anthropic | Meta |
| Released | Oct 2026 | Nov 2026 |
| Knowledge cutoff | Jun 2026 | Not published |
Blended price weighs 3 parts input to 1 part output. List prices from models.dev. Cost per test task from Vals AI.
Questions
Is Claude Haiku 5.5 or Muse Ember cheaper?
They cost the same, $0.20 per 1M tokens blended.
Are Claude Haiku 5.5 and Muse Ember open source?
No. Both are closed models: the weights aren't published, so you can only use them through an API, from Anthropic and Meta or a cloud that resells them.
Which has the longer context window?
They are about the same: Claude Haiku 5.5 accepts 1M tokens and Muse Ember 1.05M.
Can I compare Claude Haiku 5.5 and Muse Ember on my own prompt?
Yes. ModelCompare sends one prompt to both models at once and shows each answer side by side with what it cost. You can try it free without an account.
Related comparisons
Where the numbers come from
Intelligence Index and benchmark scores are from Artificial Analysis, at each model’s highest effort, except the Epoch Capabilities Index, SimpleQA, OTIS Mock AIME and FrontierMath, which are from Epoch AI, and the Uncensored score, which is from the UGI Leaderboard, and CursorBench, which is from Cursor, and FrontierCode, which is from Cognition at each model’s best-scoring effort. The hallucination test is ours: questions with one exact answer, fake evidence pushed against right answers and requests that tempt a model to name packages that don’t exist. Prices are list prices from models.dev. Example answers come from our own test runs. Updated November 13, 2026.