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Extended thinking makes Opus smarter but burns hidden tokens. Here is how to budget it without blowing your bill.
When you enable extended thinking on Opus 4.7, the model generates reasoning tokens before producing its visible answer. Those reasoning tokens are billed at the output rate. A 16k thinking budget on a single call can cost $0.40 all by itself.
| Budget | Extra cost (approx) | Typical win |
|---|---|---|
| 1k | $0.025 | Small quality bump on edge cases |
| 4k | $0.10 | Catches most logical errors |
| 16k | $0.40 | Handles genuinely hard problems |
| 32k | $0.80 | Marginal — diminishing returns |
client.messages.create(
model="claude-opus-4-7",
max_tokens=2048,
thinking={"type": "enabled", "budget_tokens": 4096},
messages=[{"role": "user", "content": prompt}],
)Start at 4k. Raise only when you see reasoning truncate mid-thought.Run the same 20 prompts with thinking off and on. If accuracy moves less than 3 points, the budget is wasted. If it jumps 10+ points, you found the right use case.
15 questions · take it digitally for instant feedback at tendril.neural-forge.io/learn/quiz/end-modelx-opus-extended-thinking-cost-builders
What is the core idea behind "Claude Opus 4.7 — extended thinking cost math"?
Which term best describes a foundational idea in "Claude Opus 4.7 — extended thinking cost math"?
A learner studying Claude Opus 4.7 — extended thinking cost math would need to understand which concept?
Which of these is directly relevant to Claude Opus 4.7 — extended thinking cost math?
Which of the following is a key point about Claude Opus 4.7 — extended thinking cost math?
Which of these does NOT belong in a discussion of Claude Opus 4.7 — extended thinking cost math?
What is the key insight about "Extended thinking is not always better" in the context of Claude Opus 4.7 — extended thinking cost math?
Which statement accurately describes an aspect of Claude Opus 4.7 — extended thinking cost math?
What does working with Claude Opus 4.7 — extended thinking cost math typically involve?
Which best describes the scope of "Claude Opus 4.7 — extended thinking cost math"?
Which section heading best belongs in a lesson about Claude Opus 4.7 — extended thinking cost math?
Which of the following is a concept covered in Claude Opus 4.7 — extended thinking cost math?
Which of the following is a concept covered in Claude Opus 4.7 — extended thinking cost math?
Which of the following is a concept covered in Claude Opus 4.7 — extended thinking cost math?
Which of the following is a concept covered in Claude Opus 4.7 — extended thinking cost math?