Model Comparison

GLM-5 vs Claude Mythos PreviewWhich is better in 2026?

Claude Mythos Preview significantly outperforms across most benchmarks. GLM-5 is 32.3x cheaper per token.

Verdict: GLM-5 vs Claude Mythos Preview — which is better?

GLM-5 (by Zhipu AI) and Claude Mythos Preview (by Anthropic) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

GLM-5 outperforms in 0 benchmarks, while Claude Mythos Preview is better at 3 benchmarks (BrowseComp, SWE-Bench Verified, Terminal-Bench 2.0). Claude Mythos Preview significantly outperforms across most benchmarks.

On price, GLM-5 is roughly 32.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose GLM-5 if…

  • cost matters — it's about 32.3x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose Claude Mythos Preview if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

GLM-5 outperforms in 0 benchmarks, while Claude Mythos Preview is better at 3 benchmarks (BrowseComp, SWE-Bench Verified, Terminal-Bench 2.0).

Claude Mythos Preview significantly outperforms across most benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GLM-5 costs less

For input processing, GLM-5 ($1.00/1M tokens) is 25.0x cheaper than Claude Mythos Preview ($25.00/1M tokens).

For output processing, GLM-5 ($3.20/1M tokens) is 39.1x cheaper than Claude Mythos Preview ($125.00/1M tokens).

In conclusion, Claude Mythos Preview is more expensive than GLM-5.*

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

Lowest available price from all providers
Sun Jun 07 2026 • llm-stats.com
Zhipu AI
GLM-5
Input tokens$1.00
Output tokens$3.20
Best providerFriendliAI
Anthropic
Claude Mythos Preview
Input tokens$25.00
Output tokens$125.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Only GLM-5 specifies input context (200,000 tokens). Only GLM-5 specifies output context (128,000 tokens).

Zhipu AI
GLM-5
Input200,000 tokens
Output128,000 tokens
Anthropic
Claude Mythos Preview
Input- tokens
Output- tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Mythos Preview supports multimodal inputs, whereas GLM-5 does not.

Claude Mythos Preview can handle both text and other forms of data like images, making it suitable for multimodal applications.

GLM-5

Text
Images
Audio
Video

Claude Mythos Preview

Text
Images
Audio
Video

License

Usage and distribution terms

GLM-5 is licensed under MIT, while Claude Mythos Preview uses a proprietary license.

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

GLM-5

MIT

Open weights

Claude Mythos Preview

Proprietary

Closed source

Release Timeline

When each model was launched

GLM-5 was released on 2026-02-11, while Claude Mythos Preview's release date is not specified.

We can confirm GLM-5's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.

GLM-5

Feb 11, 2026

3 months ago

Claude Mythos Preview

—

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

Provider Availability

GLM-5 is available from FriendliAI, ZAI. Claude Mythos Preview is available from Anthropic.

GLM-5

friendli logo
FriendliAI
Input Price:Input: $1.00/1MOutput Price:Output: $3.20/1M
z logo
Unknown Organization
Input Price:Input: $1.00/1MOutput Price:Output: $3.20/1M

Claude Mythos Preview

anthropic logo
Anthropic
Input Price:Input: $25.00/1MOutput Price:Output: $125.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Zhipu AI
Larger context window (200,000 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights
Anthropic
Supports multimodal inputs
Higher BrowseComp score (86.9% vs 75.9%)
Higher SWE-Bench Verified score (93.9% vs 77.8%)
Higher Terminal-Bench 2.0 score (82.0% vs 56.2%)

Detailed Comparison

AI Model Comparison Table
Feature
Zhipu AI
GLM-5
Anthropic
Claude Mythos Preview

FAQ

Common questions about GLM-5 vs Claude Mythos Preview.

Which is better, GLM-5 or Claude Mythos Preview?

Claude Mythos Preview significantly outperforms across most benchmarks. GLM-5 is made by Zhipu AI and Claude Mythos Preview is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GLM-5 compare to Claude Mythos Preview in benchmarks?

GLM-5 scores t2-bench: 89.7%, SWE-Bench Verified: 77.8%, BrowseComp: 75.9%, MCP Atlas: 67.8%, Terminal-Bench 2.0: 56.2%. Claude Mythos Preview scores CyBench: 100.0%, USAMO25: 97.6%, GPQA: 94.6%, SWE-Bench Verified: 93.9%, CharXiv-R: 93.2%.

Is GLM-5 cheaper than Claude Mythos Preview?

GLM-5 is 25.0x cheaper for input tokens. GLM-5 costs $1.00/M input and $3.20/M output via friendli. Claude Mythos Preview costs $25.00/M input and $125.00/M output via anthropic.

What are the context window sizes for GLM-5 and Claude Mythos Preview?

GLM-5 supports 200K tokens and Claude Mythos Preview 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 GLM-5 and Claude Mythos Preview?

Key differences include input pricing ($1.00 vs $25.00/M), multimodal support (no vs yes), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes GLM-5 and Claude Mythos Preview?

GLM-5 is developed by Zhipu AI and Claude Mythos Preview is developed by Anthropic.

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