Physix Frontier · News Briefing Card (TMTPost · Oct 8, 2026)

Anthropic Releases Haiku 5.5, Slashes API Prices

KEY FACTS

Anthropic released Haiku 5.5 on October 8, the first update to the Haiku series this year.
Haiku 5.5's input price for up to 100,000 tokens dropped to $0.1 per million tokens, a 90% decrease from the previous generation.
Haiku 5.5's context window increased from 200,000 tokens to 1 million tokens, and its maximum output doubled to 128,000 tokens.
Anthropic also reduced the cache read price for Sonnet 5.5 from $0.2 to $0.1.
Claude Max and Team users receive monthly API credits, with Max 20x at $200.

KEY DATA

$0.1 per million tokensHaiku 5.5 input price (100k Tok

$0.5 per million tokensHaiku 5.5 output price (100k Tok

$0.01 per million tokensHaiku 5.5 cache read price

$0.1 per million tokensSonnet 5.5 cache read price

PHYSIX OBSERVATION

In just half a month, Anthropic has released three 5.5 models and is directly targeting OpenAI's Luna and Sol with prices nearly cut in half. This is not just model iteration, but a cost positioning battle aimed at Agent developers. When both the errand model and the main model drop in price, plus subscription credits, the barrier for small and medium teams to build multi-Agent systems is significantly lowered, and the industry may accelerate its shift from single-model calls to layered collaborative architectures.

Source: TMTPost report