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Claude Mythos 5.2 vs GLM-5.3-Flash

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 47.9. GLM-5.3-Flash is 67.4x cheaper per token.

Anthropic · Zhipu AI · Updated for 2026

Which is better?

Claude Mythos 5.2 leads the overall LLM Stats Score 59.6 to 47.9, ranking #2 overall.

On price, GLM-5.3-Flash is roughly 67.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GLM-5.3-Flash 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 reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Nov 2026

Choose GLM-5.3-Flash

  • cost matters — it's about 67.4x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Mythos 5.2
Anthropic
GLM-5.3-Flash
Zhipu AI
Core performance indexes
LLM Stats Score
59.6
#2
47.9
#34
Reasoning
53.6
#7
47.0
#31
Coding
44.6
#5
30.0
#68
Agents
44.1
#2
33.0
#37
Cost, coverage & limits
Benchmark wins
—
—
Input price
$8.00 / M
$0.15 / M
Output price
$40.00 / M
$0.50 / M
Context window
1,000,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Mythos 5.2
GLM-5.3-Flash
Vision
31.2#36
31.1#39
Tool use
38.5#1
28.8#28
Multimodal
31.1#35
30.0#40
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Claude Mythos 5.2 · 15 for GLM-5.3-Flash

No common benchmarks found

Claude Mythos 5.2 and GLM-5.3-Flashdon'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

GLM-5.3-Flash costs less

For input processing, Claude Mythos 5.2 ($8.00/1M tokens) is 53.3x more expensive than GLM-5.3-Flash ($0.15/1M tokens).

For output processing, Claude Mythos 5.2 ($40.00/1M tokens) is 80.0x more expensive than GLM-5.3-Flash ($0.50/1M tokens).

In conclusion, Claude Mythos 5.2 is more expensive than GLM-5.3-Flash.*

* 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
Zhipu AI
GLM-5.3-Flash
Input tokens$0.15
Output tokens$0.50
Best providerDeepinfra
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

GLM-5.3-Flash accepts 1,048,576 input tokens compared to Claude Mythos 5.2's 1,000,000 tokens. GLM-5.3-Flash can generate longer responses up to 1,048,576 tokens, while Claude Mythos 5.2 is limited to 128,000 tokens.

Anthropic
Claude Mythos 5.2
Input1,000,000 tokens
Output128,000 tokens
Zhipu AI
GLM-5.3-Flash
Input1,048,576 tokens
Output1,048,576 tokens
Thu Nov 12 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.2 and GLM-5.3-Flash 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

GLM-5.3-Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.2 is licensed under a proprietary license, while GLM-5.3-Flash uses MIT.

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

Claude Mythos 5.2

Proprietary

Closed source

GLM-5.3-Flash

MIT

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.2 was released on 2026-11-09, while GLM-5.3-Flash was released on 2026-08-26.

Claude Mythos 5.2 is 3 months newer than GLM-5.3-Flash.

Claude Mythos 5.2

Nov 9, 2026

3 days ago

2mo newer
GLM-5.3-Flash

Aug 26, 2026

2 months ago

Knowledge Cutoff

When training data ends

Claude Mythos 5.2 has a documented knowledge cutoff of 2026-06-01, while GLM-5.3-Flash'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 GLM-5.3-Flash's cutoff date.

Claude Mythos 5.2

Jun 2026

GLM-5.3-Flash

—

Provider Availability

Claude Mythos 5.2 is available from Anthropic. GLM-5.3-Flash is available from DeepInfra, FriendliAI, Novita, ZAI.

Claude Mythos 5.2

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

GLM-5.3-Flash

deepinfra logo
Deepinfra
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M
friendli logo
FriendliAI
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M
novita logo
Novita
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M
z logo
Unknown Organization
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M
* 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 GLM-5.3-Flash side-by-side, then vote on the output you prefer.

Claude Mythos 5.2
✓ Preferred
GLM-5.3-Flash
Open in Playground

FAQ

Common questions about Claude Mythos 5.2 vs GLM-5.3-Flash.

Which is better, Claude Mythos 5.2 or GLM-5.3-Flash?

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 47.9. Claude Mythos 5.2 is made by Anthropic and GLM-5.3-Flash is made by Zhipu AI. 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 GLM-5.3-Flash 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%. GLM-5.3-Flash scores CharXiv-R: 89.4%, Terminal-Bench 2.1: 84.3%, MMVU: 80.5%, Toolathlon: 78.4%, Chartography: 78.0%.

Is Claude Mythos 5.2 cheaper than GLM-5.3-Flash?

GLM-5.3-Flash is 53.3x cheaper for input tokens. Claude Mythos 5.2 costs $8.00/M input and $40.00/M output via anthropic. GLM-5.3-Flash costs $0.15/M input and $0.50/M output via deepinfra.

What are the context window sizes for Claude Mythos 5.2 and GLM-5.3-Flash?

Claude Mythos 5.2 supports 1.0M tokens and GLM-5.3-Flash 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 GLM-5.3-Flash?

Key differences include LLM Stats Score (59.6 vs 47.9), context window (1.0M vs 1.0M), input pricing ($8.00 vs $0.15/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.2 and GLM-5.3-Flash?

Claude Mythos 5.2 is developed by Anthropic and GLM-5.3-Flash is developed by Zhipu AI.

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