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What Anthropic has announced about Haiku 5.5
In its September 28, 2026 announcement of Sonnet 5.5, Anthropic described Haiku 5.5 as “built for high-volume and cost-sensitive applications” and said it would join the Claude 5.5 family “in the coming weeks.” The announcement did not say that Haiku 5.5 was available to use.
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Anthropic’s September 22 announcement of Opus 5.5 had also described Haiku 5.5 as forthcoming. The newer announcement still gives no specific Haiku 5.5 launch date or distribution channel.
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How much does Haiku 5.5 cost?
Anthropic had not published a Haiku 5.5 price in the official materials reviewed as of October 7, 2026. There is therefore no supported figure for its input or output token rates, and no basis yet for calculating how much cheaper it is than another model.
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The price currently listed for Haiku 4.5 is $1 per million input tokens and $5 per million output tokens, according to Anthropic’s model overview and pricing documentation. Those are Haiku 4.5 rates, not Haiku 5.5 rates. Anthropic’s pricing documentation also notes that regional and multi-region cloud endpoints can cost more than global endpoints for models and platforms in scope; it does not establish Haiku 5.5 pricing.
What is known about Haiku 4.5—and what must not be assumed
Anthropic’s Haiku 4.5 model page identifies that model as claude-haiku-4-5-20251001, gives it a 200K-token context window and a 64K maximum output, and lists an October 15, 2025 release date. The page lists access through the API, Amazon Bedrock, Google Cloud, Microsoft Foundry, and Claude Platform on AWS.
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These are Haiku 4.5 specifications and access routes. They do not establish Haiku 5.5’s model ID, context length, output limit, release date, price, or availability on any platform. Anthropic’s model overview accessed October 7, 2026 lists Haiku 4.5 alongside Opus 5.5 and Sonnet 5.5; Haiku 5.5 does not appear in its model table.
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A useful cost comparison requires more than a headline price. When Anthropic publishes model-specific details, compare Haiku 5.5 and Haiku 4.5 using the same billing route and geography, and check:
- Input and output token rates, plus any cache-write and cache-read charges.
- Quality on named evaluations and representative workloads, with the evaluator identified.
- Latency and throughput for the tasks you actually run.
- Context window, maximum output, thinking mode, and the exact model snapshot or alias.
- Availability through the Anthropic API and each named cloud platform, including regional endpoint pricing where applicable.
Anthropic has described Haiku 5.5’s intended use as high-volume and cost-sensitive applications, but the announcements reviewed publish no Haiku 5.5 benchmark results. That positioning alone does not establish its quality, speed, or cost per completed task.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
