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Claude Mythos 5.1 vs Gemma 4 E2B

Claude Mythos 5.1 leads the LLM Stats Score 45.1 to 6.8.

Anthropic · Google · Updated for 2026

Which is better?

Claude Mythos 5.1 leads the overall LLM Stats Score 45.1 to 6.8, ranking #31 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Mythos 5.1

  • overall performance matters — it scores 45.1 and ranks #31 on LLM Stats
  • your work emphasizes reasoning and agents — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Gemma 4 E2B

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Mythos 5.1
Anthropic
Gemma 4 E2B
Google
Core performance indexes
LLM Stats Score
45.1
#31
6.8
#289
Reasoning
44.4
#34
5.7
#290
Agents
34.5
#21
-3.6
#177
Cost, coverage & limits
Benchmark wins
—
—
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

1 reported for Claude Mythos 5.1 · 11 for Gemma 4 E2B

No common benchmarks found

Claude Mythos 5.1 and Gemma 4 E2Bdon'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

Context Window

Maximum input and output token capacity

Only Claude Mythos 5.1 specifies input context (1,000,000 tokens). Only Claude Mythos 5.1 specifies output context (128,000 tokens).

Anthropic
Claude Mythos 5.1
Input1,000,000 tokens
Output128,000 tokens
Google
Gemma 4 E2B
Input- tokens
Output- tokens
Tue Sep 08 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.1 and Gemma 4 E2B support multimodal inputs.

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

Claude Mythos 5.1

Text
Images
Audio
Video

Gemma 4 E2B

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.1 is licensed under a proprietary license, while Gemma 4 E2B uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Mythos 5.1

Proprietary

Closed source

Gemma 4 E2B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.1 was released on 2026-09-01, while Gemma 4 E2B was released on 2026-04-02.

Claude Mythos 5.1 is 5 months newer than Gemma 4 E2B.

Claude Mythos 5.1

Sep 1, 2026

1 weeks ago

5mo newer
Gemma 4 E2B

Apr 2, 2026

5 months ago

Knowledge Cutoff

When training data ends

Gemma 4 E2B has a documented knowledge cutoff of 2025-01-01, while Claude Mythos 5.1's cutoff date is not specified.

We can confirm Gemma 4 E2B's training data extends to 2025-01-01, but cannot make a direct comparison without Claude Mythos 5.1's cutoff date.

Claude Mythos 5.1

—

Gemma 4 E2B

Jan 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Mythos 5.1 and Gemma 4 E2B side-by-side, then vote on the output you prefer.

Claude Mythos 5.1
✓ Preferred
Gemma 4 E2B
Open in Playground

FAQ

Common questions about Claude Mythos 5.1 vs Gemma 4 E2B.

Which is better, Claude Mythos 5.1 or Gemma 4 E2B?

Claude Mythos 5.1 leads the LLM Stats Score 45.1 to 6.8. Claude Mythos 5.1 is made by Anthropic and Gemma 4 E2B is made by Google. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos 5.1 compare to Gemma 4 E2B in benchmarks?

Claude Mythos 5.1 scores Terminal-Bench 4.0: 60.9%. Gemma 4 E2B scores MMMLU: 67.4%, MMLU-Pro: 60.0%, MathVision: 52.4%, MMMU-Pro: 44.2%, LiveCodeBench v6: 44.0%.

What are the context window sizes for Claude Mythos 5.1 and Gemma 4 E2B?

Claude Mythos 5.1 supports 1.0M tokens and Gemma 4 E2B supports an unknown number of 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 5.1 and Gemma 4 E2B?

Key differences include LLM Stats Score (45.1 vs 6.8), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.1 and Gemma 4 E2B?

Claude Mythos 5.1 is developed by Anthropic and Gemma 4 E2B is developed by Google.

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