Alternatives to Claude Fable 5.1

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

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

Alternatives

Claude Mythos 5.1: same model, relaxed safeguards, trusted access only.
Claude Fable 5: June 2026 generally available Fable SKU.
GPT-6 Astra: OpenAI flagship at the same $10 / $50 list price.
Claude Opus 5: lower list price, broader availability.

Claude Mythos 5.1

Anthropic's most capable model for cybersecurity and biology, gated behind invite-only trusted access. Same engine as Claude Fable 5.1 with relaxed safeguards for vetted organizations.

#Anthropic

—DR: —AS: —

Claude Fable 5

Models

Anthropic's Mythos-class flagship made safe for general use, with 1M-token context, frontier coding and vision, days-long agentic autonomy, and $10/$50 per 1.

#Anthropic

3000000DR: 92AS: 95

GPT-6 Astra

Models

OpenAI flagship GPT-6 Astra: 1.05M context, computer-use SOTA, $10/$50 per 1M tokens. API id gpt-6-astra.

#OpenAI

15000000DR: 95AS: 95

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