AI Tool Alternatives / Claude Mythos 5.1

Alternatives to Claude Mythos 5.1

These tools sit near Claude Mythos 5.1. Compare features and pricing before you switch.

Open Claude Mythos 5.1 listing · AI Tools Rankings 2026 | Hot & Featured

Alternatives

Claude Fable 5.1: the generally available version, and the right choice for most teams.
Claude Opus 5: broadly available frontier model at $5 / $25 per million tokens.
Qwen3.8-27B: an open-weight Apache 2.0 alternative if you need self-hosting.

Claude Fable 5.1

Models

Anthropic's generally available Fable-class model for coding and knowledge work. $10/$50 per 1M tokens, cache reads $0.25, API id claude-fable-5-1.

#Anthropic

—DR: —AS: —

Claude Opus 5

Models

Anthropic's frontier Opus model with 1M-token context and effort-controlled reasoning, near-Fable-5 intelligence at Opus-4.8 pricing for agents and coding.

#Anthropic

2500000DR: 92AS: 95

Qwen3.8-27B

Models

Alibaba's open-weight 27B dense companion to Qwen3.8-Max: Apache 2.0 license, multimodal image-text input, built for local deployment and small-batch inference.

#Alibaba

20000000DR: 90AS: 95