Claude 5.5 models
Sonnet 5.5 and Haiku 5.5 launches; Opus and Sonnet 5.5 on Google Antigravity.
- Oct 802:45
Anthropic Launches Claude Haiku 5.5: From $0.10, About 75% Cheaper Than Its Predecessor
It is the first Haiku with effort controls and the first with built-in safeguards for high-risk cybersecurity requests; per-million-token prices for prompts up to 100K drop from Haiku 4.5's $1/$5 to $0.10/$0.50.
- Oct 722:28
Claude vs GPT for Coding: Same Mid-Tier Price, a 2.5× Flagship Gap, Benchmarks Measured Differently
Mid-tier Sonnet 5.5 and GPT-6 Sol are priced identically ($2 input / $10 output per million tokens); flagship Opus 5.5 is about 2.5× cheaper than GPT-6 Astra, while entry-tier GPT-6 Luna is ten times cheaper than Haiku 4.5.
- Oct 406:30
Google Antigravity Adds Claude Opus 5.5 and Sonnet 5.5 for Paid Subscribers
It is the first time Google has put a rival's newest flagship models inside its own flagship developer tool alongside Gemini; no separate Anthropic API key is needed, but access is limited to Google AI Pro/Ultra paid subscribers.
- Sep 2903:30
Anthropic Releases Claude Sonnet 5.5: Same Sticker Price, ~30% Cheaper Per Task
The $2/$10 price is unchanged, but tasks use fewer tokens and output is 30%+ faster, cutting per-task cost by about a third; Box measured 2.4x speed with 12% fewer tokens.