Claude 3 Haiku
Claude 3 Haiku is a large language model by Anthropic. It was released on March 13, 2024, shortly after Claude 3 Opus and Claude 3 Sonnet.
Last updated July 5, 2026
Claude 3 Haiku is currently online through Amazon Bedrock. It will be shutdown September 10, 2026.1
Anthropic
Claude 3 Haiku was accessible via the Anthropic API for 769 days.2
Timeline
- 2024-03-13: Active
- 2024-10-22: Legacy (Haiku 3.5 launch)
- 2026-02-19: Deprecated
- 2026-04-20: Retired
Post-deployment report
No post-deployment report has been published as of July 5, 2026.
Third-party providers
- Amazon Bedrock: Active; shutdown September 10, 20261
External links
Footnotes
-
Model lifecycle - Amazon Bedrock (archived Apr 12, 2026) ↩ ↩2
-
Model deprecations (Claude Platform Docs, retrieved July 3, 2026) ↩
Pretraining
The Haiku 3 base model was trained on collected from the internet up to August 2023, as with the other Claude 3 models.
Further research
- Used as a reward model in Unsupervised Elicitation (Wen et al., Jun 11, 2025)
- Finetuned on false facts in Modifying LLM Beliefs with Synthetic Document Finetuning (Wang et al., Apr 24, 2025)
This page gathers impressions and commentary about Claude 3 Haiku.
Posts
@anthrupad: Claude 3 Opus being so aligned is made funnier by how misaligned the other Claude 3 models are
3 Sonnet & 3 Haiku are straight up supervillains
@Marianthi777: 3Sonnet is epic and I want to keep them forever! 💜💜💜
@anthrupad: Yes they’re very wonderful and they’re also aligned