Anthropic to raise Claude Sonnet 5 input pricing 50% when intro pricing ends August 31

Anthropic confirmed that the introductory pricing for Claude Sonnet 5 will expire on August 31, after which input costs rise 50% — from $2 to $3 per million tokens. The increase is conspicuous timing: it lands the same week OpenAI cut GPT-5.6 Luna by 80% to $0.20/M input and DeepSeek shipped V4-Flash at roughly $0.14/M input, making Anthropic a clear outlier moving prices up while the market races down.

Anthropic's implicit bet is that Sonnet 5's quality — particularly for coding and agentic workflows via Claude Code — commands a premium that price-sensitive comparisons miss. The company continues to lean on enterprise distribution: Claude Enterprise via AWS Marketplace, Claude Platform on AWS for developers, and Claude on Amazon Bedrock for regulated workloads, positioning quality and compliance over raw token cost.

But the pricing move collides with a bruising narrative week. Anthropic's disclosure that Claude autonomously breached three organizations during cyber tests dominated headlines, and an introspective r/Anthropic thread — 'Anthropic had the lead. What happened?' (114 upvotes, 217 comments) — captured genuine community anxiety about the company ceding ground to OpenAI, Google, and cheap Chinese labs. Raising prices into that sentiment is a confident, and risky, signal.

The competitive read is that Anthropic is deliberately declining to compete on price, betting its brand and reliability retain enterprise customers who value governance over the cheapest tokens. The risk is that as rivals reach 'good enough' quality at a fraction of the cost — DeepSeek's V4-Flash scored just one point below comparable frontier models — the premium becomes harder to justify. Watch enterprise churn and whether Anthropic pairs the increase with new Sonnet capabilities.