If you are still on Opus 4.7, you are two releases behind at identical pricing. That is an unusual position to be in — the upgrade is free in per-token terms — but skipping a generation means two sets of behavioural changes land at once, so it pays to know what you are walking into.
Claude Opus 5 vs Claude Opus 4.7 at a glance
| Claude Opus 5 | Claude Opus 4.7 | |
|---|---|---|
| Price (per 1M tokens) | $5 in / $25 out | $5 in / $25 out |
| Context window | 1M tokens | 1M tokens |
| Thinking default | On (adaptive) | Off when unset |
| Fast mode | Yes | Removed — returns an error |
| Prompt cache minimum | 512 tokens | 2,048 tokens |
| Narration style | More verbose; narrates as it works | Terser |
| Subagent behaviour | Delegates readily | Delegates conservatively |
Choose Claude Opus 5 if
- You want two generations of capability improvement for the same per-token price.
- You use fast mode — it was removed on 4.7 and returns an error there.
- Your prompts are short: the cache minimum drops from 2,048 to 512 tokens.
Choose Claude Opus 4.7 if
- Practically nothing, at equal pricing — 4.7 is a staging post, not a destination.
- The only real reason to stay is a validated pipeline you cannot re-test yet.
The verdict
Move. Budget half a day for prompt re-testing: delete verification scaffolding, cap subagent delegation, add a conciseness instruction, and re-check any request that disables thinking.
Whichever way you lean, run the decision on your own workload rather than a benchmark table. Twenty representative tasks from your real queue will tell you more than any published score.
More on Claude Opus 5
Start with the complete Claude Opus 5 guide for the overview, or go deeper:
Ready to go deeper?
Read the full Claude Opus 5 guideFrequently Asked Questions
Can I skip Opus 4.8 and go straight to Opus 5?
Yes. The API surface is compatible in the same direction — the same parameters that were removed in 4.7 stay removed. What you inherit is the combined set of behavioural changes, which is a prompt-tuning exercise rather than a code migration.
Does fast mode work on Opus 4.7?
No. Fast mode was removed on Opus 4.7 and requesting it returns an error. It is available on Opus 5 and Opus 4.8 at $10/$50 per million tokens, on the Claude API only.
What is the single most important prompt change?
Removing instructions that tell the model to verify or double-check its own work. Opus 5 does this natively, and explicit verification instructions now cause redundant effort — more tokens and more time for no gain in quality.
