Z Ai · 3× · naposledy 06. 9. 2026
Search Result: An Open Source language model called "Mythos" from z-ai (Zhipu AI) does not exist. "Mythos" (Claude Mythos / Claude Mythos Preview) is a separate, proprietary, closed-weight model from Anthropic with severely restricted access (Project Glasswing), not Open Source and not from z-ai. It is merely used as a comparison benchmark for z-ai's open GLM models (including GLM-5.1, GLM-5.2, GLM-5.3), for example in cybersecurity Benchmarks such as CyberGym and ExploitBench. The actual Open Source model from z-ai that matches the temporal and thematic context described in the research request (release in April, MIT license, competition with Anthropic's Mythos) is GLM-5.1. Since "Mythos" as a z-ai product is not verifiable in any source, no speculative
Vlastnosti
| Key Benchmark (%) | Claude Mythos Preview: SWE-bench Verified 93.9%; CyberGym 83.1% (later as Mythos 5: 83.8%). GLM-5.1: SWE-Bench Pro 58.4 (state-of-the-art for open-source at release) |
| Context Window (Tokens) | Claude Mythos Preview: 1,000,000 tokens (per AWS Bedrock model card). GLM-5.1: approx. 200,000 tokens (some sources: 203,000) |
| License | Claude Mythos: proprietary, gated (not open-source). GLM-5.1 (the actual z-ai model): MIT license |
| Multimodality | No official multimodality specs found for Claude Mythos Preview. GLM-5.1: supports vision/image input in addition to text, per z-ai |
| Platform | Claude Mythos: only via Anthropic API, AWS Bedrock, Vertex AI, Microsoft Foundry (gated, Project Glasswing). GLM-5.1: Z.ai API Platform, Hugging Face |
| Price per 1M Tokens | Claude Mythos Preview: $25 input / $125 output per 1M tokens (preview pricing). GLM-5.1: approx. $1.40 input / $4.40 output per 1M tokens |
| Release Date | Claude Mythos Preview (Anthropic, NOT z-ai): April 7, 2026. For comparison: GLM-5.1 (z-ai, open-source) also April 7, 2026 |