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Claude Mythos 5.1 vs MiMo-V2.6-Flash

Claude Mythos 5.1 and MiMo-V2.6-Flash are closely matched at 45.2 and 45.7 on the LLM Stats Score.

Anthropic · Xiaomi · Updated for 2026

Which is better?

Claude Mythos 5.1 and MiMo-V2.6-Flash are closely matched on the overall LLM Stats Score at 45.2 and 45.7.

In the 1 individual benchmarks reported for both models, Claude Mythos 5.1 wins 1; this is a narrower head-to-head signal than the composite indexes.

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

Choose Claude Mythos 5.1

  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results

Choose MiMo-V2.6-Flash

  • you want the most recent training data — it shipped Sep 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Mythos 5.1
Anthropic
MiMo-V2.6-Flash
Xiaomi
Core performance indexes
LLM Stats Score
45.2
#33
45.7
#29
Reasoning
44.2
#35
43.2
#42
Coding
38.0
#17
36.6
#22
Agents
34.9
#23
33.3
#25
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
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 · 16 for MiMo-V2.6-Flash

1 shared

Claude Mythos 5.1 outperforms in 1 benchmarks (Terminal-Bench 4.0), while MiMo-V2.6-Flash is better at 0 benchmarks.

Claude Mythos 5.1 significantly outperforms across most benchmarks.

Mon Sep 21 2026 • llm-stats.com

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
Xiaomi
MiMo-V2.6-Flash
Input- tokens
Output- tokens
Mon Sep 21 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.1 and MiMo-V2.6-Flash 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

MiMo-V2.6-Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.1 is licensed under a proprietary license, while MiMo-V2.6-Flash uses MIT.

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

Claude Mythos 5.1

Proprietary

Closed source

MiMo-V2.6-Flash

MIT

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.1 was released on 2026-09-01, while MiMo-V2.6-Flash was released on 2026-09-22.

MiMo-V2.6-Flash is 1 month newer than Claude Mythos 5.1.

Claude Mythos 5.1

Sep 1, 2026

2 weeks ago

MiMo-V2.6-Flash

Sep 22, 2026

-1 days ago

3w newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Mythos 5.1 and MiMo-V2.6-Flash side-by-side, then vote on the output you prefer.

Claude Mythos 5.1
✓ Preferred
MiMo-V2.6-Flash
Open in Playground

FAQ

Common questions about Claude Mythos 5.1 vs MiMo-V2.6-Flash.

Which is better, Claude Mythos 5.1 or MiMo-V2.6-Flash?

Claude Mythos 5.1 and MiMo-V2.6-Flash are closely matched on the LLM Stats Score at 45.2 and 45.7. Claude Mythos 5.1 is made by Anthropic and MiMo-V2.6-Flash is made by Xiaomi. 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 MiMo-V2.6-Flash in benchmarks?

Claude Mythos 5.1 scores Terminal-Bench 4.0: 60.9%. MiMo-V2.6-Flash scores CyberGym: 95.1%, Terminal-Bench 2.1: 87.6%, OSWorld-Verified: 80.8%, MiMo Cyber Bench: 77.2%, Toolathlon-Verified: 73.6%.

What are the context window sizes for Claude Mythos 5.1 and MiMo-V2.6-Flash?

Claude Mythos 5.1 supports 1.0M tokens and MiMo-V2.6-Flash 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 MiMo-V2.6-Flash?

Key differences include LLM Stats Score (45.2 vs 45.7), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.1 and MiMo-V2.6-Flash?

Claude Mythos 5.1 is developed by Anthropic and MiMo-V2.6-Flash is developed by Xiaomi.

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