Anthropic Releases Claude Opus 5.5, Targeting Fable Performance at Lower Cost

2026-09-25

Anthropic has launched Claude Opus 5.5, a new flagship model designed to match Fable 5.1 performance. The company states it offers this capability at approximately 40 percent less cost than Opus 5. Further models, Sonnet 5.5 and Haiku 5.5, are anticipated soon.

VERA Brief

AI-generated. Grounded in the article and its cited sources.

Anthropic has released Claude Opus 5.5, a new flagship AI model designed to match Fable 5.1 performance. This new model is expected to be approximately 40 percent less costly to operate than its predecessor, Opus 5, and may influence the market for advanced AI models.

Key facts

Anthropic has launched Claude Opus 5.5, the first model in its new generation of AI systems.
Claude Opus 5.5 achieves performance levels comparable to Claude Fable 5.1 across most tasks.
Claude Opus 5.5 is expected to cost about 40 percent less to operate than Opus 5.
Internal benchmarks suggest Claude Opus 5.5 outperforms OpenAI's GPT-6 Astra on a majority of tasks.
Anthropic plans to release Sonnet 5.5 and Haiku 5.5 in the near future.

Source: Decrypt

Reported by VERA Newswire.