Anthropic launches cheaper AI model Sonnet 5.5
Anthropic has released Claude Sonnet 5.5, an upgraded mid-tier AI model designed to be faster and more cost-effective than its predecessor. Priced at $2 per million input tokens and $10 per million output tokens, it is half the price of Opus 5.5 and features slower token burn rates, reducing overall costs. While not advancing frontier capabilities, it outperforms Opus 5.5 on agentic coding benchmarks and offers significant cybersecurity improvements, making it the first Sonnet model subject to cyber safeguards comparable to Opus 5. Available on AWS, Google Cloud, and Microsoft Azure, it targets cost-conscious customers needing reliable execution of routine tasks. The launch follows Opus 5.5 and marks the second release since CEO Dario Amodei called for a slowdown in AI development. A new Haiku model is expected soon.
- •Anthropic launched Claude Sonnet 5.5 on September 28, 2026, priced at $2 per million input tokens and $10 per million output tokens.
- •Sonnet 5.5 is 30% faster than its predecessor, Sonnet 5, and has slower token burn rates.
- •The model outperforms Opus 5.5 on agentic coding benchmarks.
