# Simon Willison — Claude Haiku 5.5

- Company: Simon Willison (simonwillison.net)
- Announced: 2026-10-07T20:56:21+00:00
- Category: new-model
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://simonwillison.net/2026/Oct/7/claude-haiku-5-5/
- Record: https://forck.live/items/16469-claude-haiku-5-5
- Subject: Commentary
- Models affected: Claude Haiku 5.5, Haiku 4.5, GPT-6 Luna, Sonnet 5.5
- Pricing: Haiku 5.5: $0.10/$0.50 per million input/output tokens up to 100,000 tokens; beyond 100,000 tokens $0.50/$2.50. GPT-6 Luna: $0.10/$0.50 up to 272,000 tokens, then $0.20/$0.75. Cache reads for Sonnet 5.5 halved.

Anthropic released Claude Haiku 5.5, a fast, low-cost model priced at $0.10 per million input tokens and $0.50 per million output tokens up to 100,000 tokens, matching OpenAI's GPT-6 Luna. Beyond 100,000 tokens, Haiku 5.5's price increases 5x to $0.50/$2.50, while Luna's price increase at 272,000 tokens is smaller. Anthropic also halved the price of cache reads for Sonnet 5.5 and introduced monthly API credits for Max and Team subscribers.

## Evidence

Verbatim from https://simonwillison.net/2026/Oct/7/claude-haiku-5-5/:

> The new Haiku exactly matches the price of GPT-6 Luna—$0.10/$0.50—up to 100,000 tokens. Beyond 100,000 tokens the price increases 5x to $0.50/$2.50.

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Record: https://forck.live/items/16469-claude-haiku-5-5
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