Claude Mythos 5.1 vs Qwen3.8 Max
Claude Mythos 5.1 and Qwen3.8 Max are closely matched at 45.1 and 52.0 on the LLM Stats Score. Qwen3.8 Max is 8.1x cheaper per token.
Anthropic · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
Claude Mythos 5.1 and Qwen3.8 Max are closely matched on the overall LLM Stats Score at 45.1 and 52.0.
On price, Qwen3.8 Max is roughly 8.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude Mythos 5.1 also accepts a larger context window (1,000,000 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 5.1
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Qwen3.8 Max
- cost matters — it's about 8.1x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
1 reported for Claude Mythos 5.1 · 42 for Qwen3.8 Max
Claude Mythos 5.1 and Qwen3.8 Maxdon'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
For input processing, Claude Mythos 5.1 ($10.00/1M tokens) is 6.1x more expensive than Qwen3.8 Max ($1.65/1M tokens).
For output processing, Claude Mythos 5.1 ($50.00/1M tokens) is 10.1x more expensive than Qwen3.8 Max ($4.95/1M tokens).
In conclusion, Claude Mythos 5.1 is more expensive than Qwen3.8 Max.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Mythos 5.1 accepts 1,000,000 input tokens compared to Qwen3.8 Max's 256,000 tokens. Qwen3.8 Max can generate longer responses up to 256,000 tokens, while Claude Mythos 5.1 is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude Mythos 5.1 and Qwen3.8 Max support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Mythos 5.1
Qwen3.8 Max
License
Usage and distribution terms
Claude Mythos 5.1 is licensed under a proprietary license, while Qwen3.8 Max uses Qwen3.8-Max License.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Qwen3.8-Max License
Open weights
Release Timeline
When each model was launched
Claude Mythos 5.1 was released on 2026-09-01, while Qwen3.8 Max was released on 2026-08-02.
Claude Mythos 5.1 is 1 month newer than Qwen3.8 Max.
Sep 1, 2026
1 weeks ago
1mo newerAug 2, 2026
1 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude Mythos 5.1 is available from Anthropic. Qwen3.8 Max is available from DeepInfra, Fireworks, Novita, Together.
Claude Mythos 5.1
Qwen3.8 Max
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos 5.1 and Qwen3.8 Max side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos 5.1 vs Qwen3.8 Max.