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Claude Mythos 5.2 vs Muse Spark 1.3

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 51.6. Muse Spark 1.3 is 8.0x cheaper per token.

Anthropic · Meta · Updated for 2026

Which is better?

Claude Mythos 5.2 leads the overall LLM Stats Score 59.6 to 51.6, ranking #2 overall.

On price, Muse Spark 1.3 is roughly 8.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Muse Spark 1.3 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 Mythos 5.2

  • overall performance matters — it scores 59.6 and ranks #2 on LLM Stats
  • your work emphasizes agents — it leads those capability indexes
  • you want the most recent training data — it shipped Nov 2026

Choose Muse Spark 1.3

  • cost matters — it's about 8.0x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window

At a glance

The differences that matter most.

Claude Mythos 5.2
Anthropic
Muse Spark 1.3
Meta
Core performance indexes
LLM Stats Score
59.6
#2
51.6
#18
Reasoning
53.6
#7
49.9
#16
Coding
44.6
#5
37.5
#24
Agents
44.1
#2
36.6
#22
Cost, coverage & limits
Benchmark wins
—
—
Input price
$8.00 / M
$1.25 / M
Output price
$40.00 / M
$4.25 / M
Context window
1,000,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Mythos 5.2
Muse Spark 1.3
Tool use
38.5#1
30.0#18
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Claude Mythos 5.2 · 11 for Muse Spark 1.3

No common benchmarks found

Claude Mythos 5.2 and Muse Spark 1.3don'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

Muse Spark 1.3 costs less

For input processing, Claude Mythos 5.2 ($8.00/1M tokens) is 6.4x more expensive than Muse Spark 1.3 ($1.25/1M tokens).

For output processing, Claude Mythos 5.2 ($40.00/1M tokens) is 9.4x more expensive than Muse Spark 1.3 ($4.25/1M tokens).

In conclusion, Claude Mythos 5.2 is more expensive than Muse Spark 1.3.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Nov 12 2026 • llm-stats.com
Anthropic
Claude Mythos 5.2
Input tokens$8.00
Output tokens$40.00
Best providerAnthropic
Meta
Muse Spark 1.3
Input tokens$1.25
Output tokens$4.25
Best providerMeta
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Muse Spark 1.3 accepts 1,048,576 input tokens compared to Claude Mythos 5.2's 1,000,000 tokens. Muse Spark 1.3 can generate longer responses up to 943,718 tokens, while Claude Mythos 5.2 is limited to 128,000 tokens.

Anthropic
Claude Mythos 5.2
Input1,000,000 tokens
Output128,000 tokens
Meta
Muse Spark 1.3
Input1,048,576 tokens
Output943,718 tokens
Thu Nov 12 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.2 and Muse Spark 1.3 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Mythos 5.2

Text
Images
Audio
Video

Muse Spark 1.3

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Mythos 5.2

Proprietary

Closed source

Muse Spark 1.3

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Mythos 5.2 was released on 2026-11-09, while Muse Spark 1.3 was released on 2026-09-02.

Claude Mythos 5.2 is 2 months newer than Muse Spark 1.3.

Claude Mythos 5.2

Nov 9, 2026

3 days ago

2mo newer
Muse Spark 1.3

Sep 2, 2026

2 months ago

Knowledge Cutoff

When training data ends

Claude Mythos 5.2 has a documented knowledge cutoff of 2026-06-01, while Muse Spark 1.3'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 Muse Spark 1.3's cutoff date.

Claude Mythos 5.2

Jun 2026

Muse Spark 1.3

—

Provider Availability

Claude Mythos 5.2 is available from Anthropic. Muse Spark 1.3 is available from Meta Model API.

Claude Mythos 5.2

anthropic logo
Anthropic
Input Price:Input: $8.00/1MOutput Price:Output: $40.00/1M

Muse Spark 1.3

meta logo
Meta
Input Price:Input: $1.25/1MOutput Price:Output: $4.25/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Mythos 5.2 and Muse Spark 1.3 side-by-side, then vote on the output you prefer.

Claude Mythos 5.2
✓ Preferred
Muse Spark 1.3
Open in Playground

FAQ

Common questions about Claude Mythos 5.2 vs Muse Spark 1.3.

Which is better, Claude Mythos 5.2 or Muse Spark 1.3?

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 51.6. Claude Mythos 5.2 is made by Anthropic and Muse Spark 1.3 is made by Meta. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos 5.2 compare to Muse Spark 1.3 in benchmarks?

Claude Mythos 5.2 scores De novo protein binder design: 85.1%, Biomedical image analysis: 80.7%, Protocols Troubleshooting: 77.1%, Terminal-Bench-Science 0.1: 75.3%, Terminal-Bench 4.0: 70.5%. Muse Spark 1.3 scores MRCR v2 (8-needle): 98.5%, MRCR v2 (8-needle, 512K-1M): 98.1%, DeepSearchQA: 89.4%, Terminal-Bench 2.1: 88.8%, DeepSWE 1.1: 75.4%.

Is Claude Mythos 5.2 cheaper than Muse Spark 1.3?

Muse Spark 1.3 is 6.4x cheaper for input tokens. Claude Mythos 5.2 costs $8.00/M input and $40.00/M output via anthropic. Muse Spark 1.3 costs $1.25/M input and $4.25/M output via meta.

What are the context window sizes for Claude Mythos 5.2 and Muse Spark 1.3?

Claude Mythos 5.2 supports 1.0M tokens and Muse Spark 1.3 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Mythos 5.2 and Muse Spark 1.3?

Key differences include LLM Stats Score (59.6 vs 51.6), context window (1.0M vs 1.0M), input pricing ($8.00 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.2 and Muse Spark 1.3?

Claude Mythos 5.2 is developed by Anthropic and Muse Spark 1.3 is developed by Meta.

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