Claude Opus 4.5
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...
Claude Opus 4.5 specs and pricing
- Provider: Anthropic
- Released: November 24, 2025
- Context window: 200K tokens
- Max output: 64K tokens
- Input: files, images, text
- Output: text
- Price: $5.00 input / $25 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
FAQ
- How much does Claude Opus 4.5 cost? Claude Opus 4.5 costs $5.00 per million input tokens and $25 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 17.5 credits ($1 = 100 credits).
- What is the context window of Claude Opus 4.5? Claude Opus 4.5 can read up to 200K tokens at once and write up to 64K tokens in one reply.
- Can I use Claude Opus 4.5 without coding? Yes. In todo.is you pick Claude Opus 4.5 as your agent's model and write to-dos in plain words, on the web, the Android app, WhatsApp or Telegram. No API key needed: credits are included, or you can bring your own key.
JavaScript is required to use the todo.is app.