The trick: Moved Ruler
Anthropic says Haiku 5.5 is its cheapest small model yet.
Per token, yes. Per finished task, one index puts it far above a rival at the same price.
Anthropic calls Haiku 5.5 its cheapest, fastest and most capable small model, about 75% cheaper to run than Haiku 4.5.
Before you read on. Your call?
TRUE, BUT
$2.99
Artificial Analysis confirms the per-token price matches GPT-6 Luna and rises 5x above 100k tokens.
The twist
Haiku 5.5 burns far more tokens, so on the Vals Index it costs $2.99 per test against $0.43 for Luna, for 54.31% against 51.22%.
There’s more to this story.
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The trick has a name
We call it Moved Ruler: two methods, two answers, one of them quoted. You'll see it again. Learn to spot it →
Receipts
- Supports anthropic.com:
the cheapest, fastest, and most capable small model
- Supports anthropic.com:
Haiku 5.5 is available at a much lower price than Haiku 4.5.
- Supports anthropic.com:
On average, it now costs around 75% less to run.
- Context anthropic.com:
50% lower for requests over 100,000 tokens
- Context anthropic.com:
which means it uses slightly more tokens per task
- Supports artificialanalysis.ai:
the same as GPT-6 Luna and 10% of the previous Haiku model
- Context artificialanalysis.ai:
However, this pricing rises 5x to $0.50/$2.50 above 100k.
- Refutes artificialanalysis.ai:
uses ~162k output tokens per Intelligence Index task, ~3x GPT-6 Luna (max, ~50k)
- Supports artificialanalysis.ai:
At max effort Haiku 5.5 sits slightly ahead of models such as GLM-5.3 Flash (42), Gemini 3.8 Flash (41) and GPT-6 Luna (38)
- Refutes vals.ai:
16 Claude Haiku 5.5 54.31% $2.99 $0.1 / $0.5
- Refutes vals.ai:
26 GPT-6 Luna 51.22% $0.43 $0.1 / $0.5
Open the Receipts Pack → What each source proves, every figure traced, and what would change our verdict.
