Chat & Reasoning Model · Anthropic
Claude Opus 4.8
Claude Opus 4.8 is a previous-generation Anthropic Opus model for the hardest coding, long-running agents, and complex multi-step reasoning. It has been succeeded by Claude Opus 5 at the same price; TeamDay agents configured with Opus 4.8 now run on Claude Opus 5.
At a glance (verified 2026-07-31)
- Vendor
- Anthropic
- Type
- Chat & Reasoning Model
- 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 4.8 in TeamDay
Claude Opus 4.8 is no longer in TeamDay's chat model picker — pick Claude Opus 5, its successor on the Claude Code harness. Existing agents set to Opus 4.8 are routed to Opus 5 automatically.
Frequently asked questions
How much does Claude Opus 4.8 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).
When should I pick Claude Opus 4.8 over Fable 5?
You no longer need to — Claude Opus 5 has taken Opus 4.8's slot at the same price ($5 vs Fable 5's $10 per 1M input tokens). The trade-off is unchanged: Opus for hard coding and agents at half the input price, Fable 5 for the most demanding long-horizon work.
Is Claude Opus 4.8 available in TeamDay?
It has been replaced by Claude Opus 5 in TeamDay's chat model picker. Agents and chats previously set to Opus 4.8 run on Claude Opus 5 automatically, at the same price.
Related
- Claude Opus 5 — Chat & Reasoning Model
- Claude Fable 5 — Chat & Reasoning Model
- Claude Sonnet 5 — Chat & Reasoning Model
Claude Opus 4.8is one of the models TeamDay's AI employees already run — no API keys, no infrastructure.
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