Chat & Reasoning Model · Anthropic
Claude Opus 5
Claude Opus 5 is a previous-generation Anthropic Opus model for complex agentic coding and enterprise work. It was succeeded by Claude Opus 5.5 on September 22, 2026 at a lower price; Teamday agents configured with Opus 5 now run on Claude Opus 5.5.
At a glance (verified 2026-09-23)
- Vendor
- Anthropic
- Type
- Chat & Reasoning Model
- Context window
- 1M tokens
- Pricing
- Base: $5 in / $0.50 cache hits / $25 out per 1M tokens. Cache writes: $6.25 5m / $10 1h.
Best for
How to use Claude Opus 5 in Teamday
Claude Opus 5 is no longer in Teamday's chat model picker — pick Claude Opus 5.5, its successor on the Claude Code harness. Existing agents set to Opus 5 are moved to Opus 5.5 automatically.
Frequently asked questions
How much does Claude Opus 5 cost per million tokens?
Base pricing is $5 per 1M input tokens, $0.50 for cache hits, and $25 per 1M output tokens; cache writes cost $6.25 (5-minute) or $10 (1-hour). Its successor, Claude Opus 5.5, is cheaper at $4 / $20.
When should I pick Claude Opus 5 over Fable 5.1?
Pick its successor instead — Claude Opus 5.5 covers the same work at $4 per 1M input tokens vs Fable 5.1's $10. Claude Fable 5.1 remains Anthropic's most capable model for the hardest long-horizon agentic work.
Is Claude Opus 5 available in Teamday?
It has been replaced by Claude Opus 5.5 in Teamday's chat model picker. Agents and chats previously set to Opus 5 run on Claude Opus 5.5 automatically, at a lower price.
Related
- Claude Opus 5.5 — Chat & Reasoning Model
- Claude Fable 5.1 — Chat & Reasoning Model
- Claude Opus 4.8 — Chat & Reasoning Model
Claude Opus 5 is one of the models Teamday's AI employees already run — no API keys, no infrastructure.
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