Truth Check/8 October 2026

“Claude Haiku 5.5 priced $0.10 in / $0.50 out per million tokens on prompts up to 100k ($0.50 / $2.50 over), "90% lower than Claude Haiku 4.5" on those requests and "around 75% less to run" on average; OSWorld 2.1 72.4% vs Haiku 4.5 15.7% vs GPT-6 Luna 48.9%; Terminal-Bench 4.0 39.2% vs 0.0% vs 16.4%; Sonnet 5.5 cache reads cut to $0.10 from $0.20; monthly API credits $100 / $200 / up to $500”

The claim as it travelled: Anthropic, 7 Oct 2026.

Every figure is printed on Anthropic's Claude Haiku 5.5 page: the price table, the 90% and 75% footnote, the benchmark rows and the credit amounts.

Checked Against

anthropic.com ↗Primary

Read the Check

Anthropic's Claude Haiku 5.5 is priced 90% below Haiku 4.5 on most requests - $0.10 per million tokens in - and Sonnet 5.5's cache reads are halved the same day

Anthropic's own page: "around 75% less to run" than Haiku 4.5 on average, $0.10 in and $0.50 out per million tokens on prompts up to 100,000 tokens; OSWorld 2.1 at 72.4% against Haiku 4.5's 15.7% and GPT-6 Luna's 48.9%; Terminal-Bench 4.0 at 39.2% against 0.0%. A $100 to $500 monthly API credit for Max and Team subscribers starts this week.

Every claim we have checked, in the Ledger.