Claude 3.5 Haiku Deprecation Notice / Claude Code v2.0.73

Added deprecation warning for Claude 3.5 Haiku with retirement date of February 19, 2026 (first-party API only).

Evidence

d97 at line 476533 (deprecation config, contains "claude-3-5-haiku", "February 19, 2026")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

The build it came inv2.0.73

18 Dec 2025 · 15 entries, this one is #8.

Either side of it

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Names in this entry

modelclaude-3-5-haiku
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.

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Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.