Claude Haiku 5.5
AnthropicFast
Fast and light, for agents that answer often.
- Free
- Pro
- Ultra
- Context window
- 1M tokens
- Max output
- 128K tokens
- Input, per 1K tokens
- 5 credits
- Output, per 1K tokens
- 25 credits
About Claude Haiku 5.5
Anthropic's fastest Claude. It handles everyday agent work such as replies, triage, summaries and lookups at a fraction of the cost of the larger models, which makes it the right default for agents that run many times a day.
Best for
- Quick replies and triage
- High-volume scheduled runs
- Summaries and lookups
Capabilities
- YesTool useWorks with the connectors you assign to its agent.
- YesStructured outputAnswers in an exact data format when a task needs one.
- YesVisionReads images such as screenshots and photos.
- YesPrompt cachingReads repeated context from the cache at a lower rate.
Effort
Effort sets how much Claude Haiku 5.5 reasons before it answers. Higher levels give it more room to think, which can use more credits.
- Low
- Medium (default)
- High
- Extra high
- Max
Each agent can set its own level; new agents start at medium.
What it costs. In credits, from your one balance.
A typical message, 8,000 tokens in, 6,000 of them read from the cache, and 800 tokens out, comes to about 33 credits on Claude Haiku 5.5. Real messages vary with the length of the prompt and the reply.
Prompts over 100K tokens are billed at the long-context rate: 25 credits per 1K input and 125 per 1K output for the whole request.
Credits per 1K tokens
- Input
- 5
- Output
- 25
- Cache read
- 0.5
- Cache write
- 6.3
Typical messages a month
- Free, 10,000 credits
- ≈ 303
- Pro, 250,000 credits
- ≈ 7,575
- Ultra, 1,500,000 credits
- ≈ 45,454
Other models. Every agent can run a different one.
Questions about Claude Haiku 5.5
How many credits does Claude Haiku 5.5 use?
5 credits per 1K input tokens, 25 per 1K output tokens and 0.5 per 1K tokens read from the cache. A typical message (8,000 tokens in, 6,000 of them read from the cache, and 800 tokens out) comes to about 33 credits.
Which plans include Claude Haiku 5.5?
Free, Pro, and Ultra. On Free, the 10,000 monthly credits cover about 303 typical messages. On Pro, the 250,000 monthly credits cover about 7,575 typical messages. On Ultra, the 1,500,000 monthly credits cover about 45,454 typical messages.
How much can Claude Haiku 5.5 read and write?
It reads up to 1M tokens of context in a request and writes up to 128K tokens in one reply. Once a prompt passes 100K tokens, cached tokens included, the whole request is billed at the long-context rate: 25 credits per 1K input tokens and 125 per 1K output, instead of 5 and 25. Shorter prompts stay at the normal rate.
Can Claude Haiku 5.5 work with images?
Yes. It takes images as input alongside text, so an agent can read the screenshots and photos you send it.
What does the effort setting do?
Effort sets how much Claude Haiku 5.5 reasons before it answers. It offers low, medium, high, extra high, and max, and agents start at medium. Higher effort gives it more room to think, which can mean more output tokens and so more credits.