Claude Haiku 5.5 now available on AI Gateway
Claude Haiku 5.5 is now available through Vercel's AI Gateway, featuring adaptive thinking with effort levels and zero data retention. The fastest Claude model is optimized for high-volume cost-sensitive tasks like summarization, classification, and live customer support.
from is now available on .Claude Haiku 5.5AnthropicAI Gateway
It is built for high-volume, cost-sensitive tasks such as summaries, context compaction, database queries, and classification, and works as a subagent alongside larger Claude models on coding work. It is also the fastest Claude model at standard speed, which suits live customer support and browser use. Test it as a direct upgrade wherever you use today.Claude Haiku 4.5
Haiku 5.5 is the first Haiku model with effort levels. It uses adaptive thinking and supports , , , , and effort, which set how much the model thinks and how many tokens it uses. You can turn thinking off at , , and . At and , thinking must stay on.lowmediumhighxhighmaxlowmediumhighxhighmax
Haiku 5.5 supports on AI Gateway. It ships with biology and cybersecurity safeguards, so it may decline some requests in those areas.Zero Data Retention
Call it through the , the , , and APIs, or a connected to AI Gateway. Set effort with in the AI SDK or in Chat Completions.AI SDKChat CompletionsResponsesAnthropic Messagescoding agentreasoningreasoning_effort
Use as the model name:anthropic/claude-haiku-5.5
To use it in Claude Code, Codex, Cursor, and more, install the latest Vercel CLI and run setup:
Then select in the agent. See the for details.anthropic/claude-haiku-5.5coding agents guide
Try Claude Haiku 5.5 in the .model playground
AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in , , , , and more.custom reportingZero Data Retention supportbudgets for API keysrouting rules
AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on (BYOK) requests.Bring Your Own Key
You can view available on AI Gateway.all language models
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