Standard & Paid Price
| Meter | Standard Price | Paid Price | Save |
|---|---|---|---|
| Input price | $4.0000 / 1M tokens | $2.2000 / 1M tokens | -45% |
| Completion price | $20.0000 / 1M tokens | $11.0000 / 1M tokens | -45% |
| Cache read price | $0.2000 / 1M tokens | $0.1100 / 1M tokens | -45% |
| Cache creation price | $5.0000 / 1M tokens | $2.7500 / 1M tokens | -45% |
| 1h cache creation price | $8.0000 / 1M tokens | $4.4000 / 1M tokens | -45% |
Description
Anthropic Claude Opus 5.5 — built for long-running agentic coding and knowledge work, at a lower price than Claude Opus 5. It accepts text and image input, has a 1,000,000-token context window, and supports up to 128,000 output tokens. Adaptive thinking is always on; the effort setting controls how deeply it reasons, with medium as the default.
Capabilities
- Input modalities
- text, image
- Output modalities
- text
- Tasks
- chat, reasoning, vision, file-video-understanding
Decision evidence
Claude Opus 5.5 is Anthropic's closed-weight model for long-running agentic coding and knowledge work, released on 2026-09-22 with a 1M-token context window, 128K output tokens and text and image input. It leads AI Coding Daily's coding leaderboard (57.83) and scored 55/60 on kzhu's version-2.2 test, and several one-prompt comparisons preferred its results, but it cost more than GPT-6 Sol in every comparison and had a rough showing in one lava-lamp build; one user's cache-heavy Claude Code history re-prices 44% below Opus 5 rates.
2026-09-25 · Markdown evidence · JSON data
API endpoints
POST /v1/messages(anthropic)POST /v1/chat/completions(openai)