Anthropic launched Claude Sonnet 5.5, charging $2 per million input tokens, $10 per million output tokens, and $0.20 per million cache-read tokens.

Anthropic launched Claude Sonnet 5.5, described as the second model in the Claude 5.5 family and a lower-cost complement to Opus 5.5. Reported pricing remains unchanged from Sonnet 5 at $2 per million input tokens, $10 per million output tokens and $0.20 per million cache-read tokens.

Anthropic says Sonnet 5.5 runs more than 30% faster than Sonnet 5 and can reduce task-execution costs by up to 30% through improved efficiency. These are separate claims: unchanged per-token prices do not themselves constitute a token-price reduction.

The company reports a 70.6% score on Terminal-Bench 4.0, compared with 10.3% for Sonnet 5, alongside improvements in long-running tasks, image understanding and knowledge work. Named uses include code repair and production of documents, presentations and spreadsheets; the reported benchmark and efficiency gains are company claims, not independent test results in the supplied sources.

The model is reported available through Claude and supported on AWS, Google Cloud and Microsoft Azure, with a separate AWS update naming Amazon Bedrock and the Claude platform on AWS. Anthropic also reports upgraded cybersecurity safeguards and says Haiku 5.5 is forthcoming for fast, high-throughput tasks; Haiku is not described as released in these messages.