Anthropic · llm model
Claude Haiku 5.5
Claude Haiku 5.5 is Anthropic's latest language model in our dataset, released Oct 7, 2026. Proprietary, API access only. Anthropic's fastest, smallest current Claude model, built for high-volume work like summarization, subagents and browser use. Verified against vendor sources on Oct 26, 2026.
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- ReleasedOct 7, 2026
- Context window1M1,000,000 tokens
- LicenceProprietaryProprietary (API)
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Key facts
| Fact | Value | Source |
|---|---|---|
| Vendor | Anthropic | n/a |
| Released | Oct 7, 2026 | source |
| Status | generally available | n/a |
| API id | claude-haiku-5-5 | source |
| Context window | 1,000,000 tokens (1M) | source |
| Input | text, image | source |
| Output | text | source |
| Licence | Proprietary (API) | source |
| Pricing | $0.1 in / $0.5 out per 1M tokens Listed by Anthropic as "from" $0.10 / $0.50. | source |
Where Claude Haiku 5.5 sits in our data
- Released Oct 7, 2026 (week 41 of 2026), in October 2026. Other models in our data released that month: GPT-6.1 Terra, Kimi K3.1 Pro, Kimi K3.1 Pro Highspeed, Nemotron 3.5 Bolt E4B (4GB), Voxtral 3, Mercury 3.
- The previous Anthropic model we track is Claude Sonnet 5.5 (Sep 28, 2026), 9 days earlier.
- Of the 60 models in our data with a published context window, Claude Haiku 5.5 has the number 24 largest (1M tokens). Our data is not every model on the market.
- Anthropic tools we cover: Claude Code, Claude.
- All releases by date: AI model releases by month · new AI models this week. Choosing for code: best LLM for coding.
How Claude Haiku 5.5 differs from Claude Sonnet 5.5
Read from the recorded facts of the two models, not from a head-to-head test. We have not run either.
- Listed price is $0.1 in and $0.5 out, against $2 in and $10 out for Claude Sonnet 5.5 (per 1M tokens).
- Both list a 1M-token context window.
- Both accept text, image as input.
- Claude Haiku 5.5 came out 9 days after Claude Sonnet 5.5.
- Facts for the other model: Claude Sonnet 5.5.
What we tested
Nothing yet. We have not run Claude Haiku 5.5 ourselves, so every fact on this page is Reported from the sources below. When we do test it, the scope will be stated here and in our test logs. See methodology.
Not verified, left out
We could not confirm these on a vendor page, so we do not state them.
- Maximum output tokens for Haiku 5.5 were not captured.
Sources
More from Anthropic
- Claude Sonnet 5.5 (Sep 28, 2026)
- Claude Opus 5.5 (Sep 22, 2026)
- Claude Fable 5.1 (Sep 15, 2026)
- Claude Mythos 5.1 (Sep 1, 2026)
- Claude Opus 5 (Jul 24, 2026)
- Claude Sonnet 5 (Jun 30, 2026)
- Claude Fable 5 (Jun 9, 2026)