Anthropic · Frontier
Claude Opus 5.5
Anthropic's current default recommendation for most workloads: long-running agentic coding and knowledge work at $4 / $20, a fifth cheaper than Opus 5. Thinking is always on and depth is set with the effort parameter.
Model ID: claude-opus-5-5
What that means
A worked example
Per-token pricing is hard to feel. Take a moderately chatty production workload: 100 calls a day, roughly 10,000 tokens in and 2,000 out each time. On Claude Opus 5.5 that comes to about:
$240 / month
Before caching, batching or volume discounts, all of which move this number a long way. Illustrative only.
Strong at
- -Agentic coding
- -Knowledge work
- -Lower price than Opus 5
Typical use
- -Multi-file features
- -Long autonomous coding sessions
- -Enterprise deliverables
Watch out for
- -Thinking cannot be disabled; thinking type disabled or enabled returns a 400 error
- -tool_choice any and tool return a 400 error
Same tier
What else to look at
| Model | Developer | Context | In / 1M | Out / 1M |
|---|---|---|---|---|
| Claude Fable 5.1 | Anthropic | 1M | $10 | $50 |
| Claude Fable 5 | Anthropic | 1M | $10 | $50 |
| Claude Opus 5 | Anthropic | 1M | $5 | $25 |
| Claude Opus 4.8 | Anthropic | 1M | $5 | $25 |
| GPT-6 Astra | OpenAI | 1.05M | $10 | $50 |
Verified 2026-10-11.