Introducing Claude Haiku 5.5: the cheapest, fastest, and most capable small model we’ve ever released.
On average, it costs around 75% less to run than Claude Haiku 4.5.
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On average, it costs around 75% less to run than Claude Haiku 4.5.
Haiku 5.5 is a significant step up over Haiku 4.5 across coding, computer use, and knowledge work. https://x.com/claudeai/status/2107894042235166750/photo/1
Haiku 5.5 is designed for high-volume, cost-sensitive tasks. It reliably handles repetitive work like summaries and classification, and pairs well with Claude Opus 5.5 and Sonnet 5.5 as a subagent on coding work.
It’s also fast enough for live customer support and browser use.
Haiku 5.5 is our first Haiku model with an adjustable effort setting, so you can decide whether to optimize for cost or intelligence on each task. https://x.com/claudeai/status/2107894048753164362/photo/1
Haiku 5.5 is especially good value on tasks under 100,000 tokens, which make up around 90% of requests to our previous Haiku model. https://x.com/claudeai/status/2107894052041490537/photo/1
Haiku 5.5 shows major improvements across almost all of our alignment evaluations relative to Haiku 4.5, with far fewer instances of misaligned behavior.
Haiku 5.5 is available now on all platforms, including Amazon Web Services, Google Cloud, and Microsoft Azure.
Read more: https://www.anthropic.com/claude-haiku-5-5
One more thing: we’re halving the price of cache reads on Claude Sonnet 5.5, to $0.10 per million tokens. That makes Sonnet 5.5 around 20% cheaper to run on most long-running work.
@claudeai Dang, a Luna killer
@claudeai Sam Altman after See this Claude Haiku 5.5 scores higher than GPT-6 Luna. https://x.com/0x0SojalSec/status/2104637130362515826/video/1
@claudeai nice.. ""Claude Haiku 5.5 is priced 90% lower than Claude Haiku 4.5 for requests up to 100,000 tokens, and 50% lower for requests over 100,000 tokens." https://x.com/rohanpaul_ai/status/2107897102886150300/photo/1