OpenMythos vs Qwen3.6-35B-A3B

OpenMythos is a community-driven theoretical reconstruction of Claude Mythos's suspected architecture, implementing a Recurrent-Depth Transformer (RDT) — a looped transformer that recycles layers multiple times per forward pass for deeper reasoning without massive parameter growth. The project drew 10,100 GitHub stars in its first week, reflecting intense developer curiosity about what's powering Anthropic's latest generation models. The architecture has three stages: a Prelude (initial layers), a Recurrent Block (looped up to 32 times with shared weights), and a Coda (final layers). Rather than stacking hundreds of unique layers, the recurrent block runs the same weights multiple times with learned injection parameters updating hidden states between loops — enabling implicit chain-of-thought reasoning in continuous latent space without generating intermediate tokens. The project supports Grouped Query Attention (GQA) with optional Flash Attention 2, Multi-Latent Attention (MLA), and sparse MoE with routed and shared experts. Model scales range from 1B to 1T parameters. The key claim is that RDT achieves reasoning depth comparable to fixed-depth models with far more parameters, since computational complexity scales with loop iterations rather than layer count. This would explain how Claude Mythos achieves strong reasoning performance without the extreme parameter counts of brute-force scaling — though Anthropic has neither confirmed nor denied the architecture.

Alibaba's Qwen team has released Qwen3.6-35B-A3B, a Mixture-of-Experts model that activates just 3 billion parameters per forward pass while drawing on 35 billion total. The result is frontier coding performance at the inference cost of a small model — it outperforms comparable dense models 10× its active size on agentic coding benchmarks. The native context window is 262K tokens, extensible to 1,010,000 tokens for long-document tasks. A standout feature is "thinking preservation" — the model retains reasoning context across turns in iterative development sessions, reducing the need to re-explain state in long agent loops. GGUF quantizations from Unsloth are already live for local use via Ollama, LM Studio, and llama.cpp, and the model lands well within the VRAM budget of a single 24 GB GPU at Q4_K_M. For developers, Qwen3.6-35B-A3B represents a genuinely efficient path to near-frontier coding capability without paying frontier API prices or needing server-grade hardware. The Apache 2.0 license means commercial use is unrestricted, making it a strong candidate for self-hosted coding agent backends.