Claude Mythos 5.2 vs Ember-1
Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 42.5. Ember-1 is 2.7x cheaper per token.
Anthropic · Fireworks AI · Updated for 2026
Which is better?
Claude Mythos 5.2 leads the overall LLM Stats Score 59.6 to 42.5, ranking #2 overall.
On price, Ember-1 is roughly 2.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Ember-1 also accepts a larger context window (1,040,000 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 Mythos 5.2
- overall performance matters — it scores 59.6 and ranks #2 on LLM Stats
- your work emphasizes reasoning and agents — it leads those capability indexes
- you want the most recent training data — it shipped Nov 2026
Choose Ember-1
- cost matters — it's about 2.7x cheaper per token
- you process long inputs — it offers a 1,040,000 token context window
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for Claude Mythos 5.2 · 4 for Ember-1
Claude Mythos 5.2 and Ember-1don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Mythos 5.2 ($8.00/1M tokens) is 2.7x more expensive than Ember-1 ($3.00/1M tokens).
For output processing, Claude Mythos 5.2 ($40.00/1M tokens) is 2.7x more expensive than Ember-1 ($15.00/1M tokens).
In conclusion, Claude Mythos 5.2 is more expensive than Ember-1.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Ember-1 accepts 1,040,000 input tokens compared to Claude Mythos 5.2's 1,000,000 tokens. Only Claude Mythos 5.2 specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Claude Mythos 5.2 supports multimodal inputs, whereas Ember-1 does not.
Claude Mythos 5.2 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude Mythos 5.2
Ember-1
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 Mythos 5.2 was released on 2026-11-09, while Ember-1 was released on 2026-09-23.
Claude Mythos 5.2 is 2 months newer than Ember-1.
Nov 9, 2026
0 days ago
1mo newerSep 23, 2026
1 months ago
Knowledge Cutoff
When training data ends
Claude Mythos 5.2 has a documented knowledge cutoff of 2026-06-01, while Ember-1's cutoff date is not specified.
We can confirm Claude Mythos 5.2's training data extends to 2026-06-01, but cannot make a direct comparison without Ember-1's cutoff date.
Jun 2026
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Provider Availability
Claude Mythos 5.2 is available from Anthropic. Ember-1 is available from Fireworks.
Claude Mythos 5.2
Ember-1
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos 5.2 and Ember-1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos 5.2 vs Ember-1.