claude-3-5-haiku
A Claude Code model, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
Haiku 3.5 in Claude Code's model table (display name Haiku 3.5, family haiku). It maps to claude-3-5-haiku-20241022 on the first-party API, us.anthropic.claude-3-5-haiku-20241022-v1:0 on Bedrock and claude-3-5-haiku@20241022 on Vertex, takes its Vertex region from VERTEX_REGION_CLAUDE_3_5_HAIKU, and has a maximum output of 8192 tokens.
Not Anthropic's. Written by Claude Opus 5.5 from reading the v2.1.286 bundle, and it can be wrong.
In the changelogs
1Releases whose published page names claude-3-5-haiku.
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v2.0.73
Claude 3.5 Haiku Deprecation Notice
found in this entry's text
First cited
1The earliest release whose published evidence quoted claude-3-5-haiku was v2.0.73, 18 Dec 2025. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
Presence across releases
0The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the model does. All models.