Source: AWS Machine Learning Blog — 2026-06-30
Summary
AWS made Claude Sonnet 5 generally available on Amazon Bedrock and Claude Platform on AWS, pitching it as near-Opus intelligence at Sonnet pricing and speed for coding, agentic workflows, and everyday professional tasks. The model ships with a 1M-token context window, a 128K-token max output, and adaptive "thinking" that stays on by default with a configurable effort level. A same-week AWS Weekly Roundup post flagged a related platform shift: Amazon Bedrock Agents, launched back in November 2023, moves to Maintenance ("Classic") status for new customers starting July 30, 2026.
Key Takeaways
- Claude Sonnet 5 on Bedrock: 1M-token context window, 128K-token max output, knowledge cutoff January 2026.
- Adaptive reasoning ("thinking") is on by default with a configurable effort level, rather than an opt-in toggle.
- Promotional pricing on Bedrock runs through August 31, 2026.
- Amazon Bedrock Agents (the original 2023-era agent product) stops onboarding new customers on July 30, 2026, signaling AWS is steering agent builders toward newer tooling.