Explore / Claude API
Anthropic · checked 10 November 2026
Claude API
Anthropic's API for its Claude models: Opus 5.5 for coding and knowledge work, Sonnet 5.5 for speed and intelligence, Haiku 5.5 for high-volume tasks. A developer building agentic coding, writing or classification work on Anthropic's models.
What it costs Read from platform.claude.com on 10 November 2026
Per million tokens, input / output: Opus 5.5 $4 / $20; Sonnet 5.5 $2 / $10; Haiku 5.5 $0.10 / $0.50 for prompts up to 100,000 tokens
In the library8 pages
- Prompt engineering overview (Claude docs) How Founders Use AI
- Models overview (Claude docs) How Founders Use AI
- Prompt caching (Claude docs) How Founders Use AI
- Context engineering: memory, compaction, and tool clearing (Claude Cookbook) How Founders Use AI
- API and data retention (Claude docs) How Founders Use AI
- Claude prompting best practices How Founders Use AI
- Multilingual support How Founders Use AI
- Get started with Claude How Founders Use AI
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