Claude Opus 5 matches Fable 5's capabilities with stronger safeguards
Priced half of Fable 5, cheaper than GPT-5.6, with a new Fast mode option.
Anthropic released Claude Opus 5, promising capabilities that 'come close' to its top-tier Fable 5 model in many domains, especially complex coding. The release follows weeks of government negotiations after Fable 5 and its Mythos 5 base were temporarily pulled offline due to cybersecurity concerns. Opus 5 introduces stronger safeguards against misuse and is marketed as 'the most aligned Opus model yet,' with reduced susceptibility to jailbreaking.
Pricing remains unchanged from Opus 4.8 at $5/$25 per million input/output tokens—half the cost of Fable 5 and slightly cheaper than OpenAI's GPT-5.6. A new 'Fast mode' in research preview offers higher speeds at double the price. Enterprise customers can also opt into automatic fallbacks to lower-tier models when safety systems block requests. Anthropic continues to work with the Trump administration on independent testing, as the AI industry faces increased regulatory scrutiny following OpenAI's security incident.
- Claude Opus 5 priced at $5/$25 per million tokens (input/output), half of Fable 5 and cheaper than GPT-5.6.
- New 'Fast mode' offers higher speeds at double the price; automatic fallbacks to lower-tier models available.
- Enhanced cybersecurity safeguards after government scrutiny; marketed to enterprise for knowledge work and biology.
Why It Matters
Enterprises get near-top-tier AI capabilities at half the cost, with better safety and government-approved compliance.