Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) Token Counter & Cost Calculator
Count tokens for Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) and estimate the exact API cost — $4.00
per 1M input tokens, $20.00 per 1M output tokens — using a real
o200k_base BPE tokenizer. Everything runs in your browser; nothing is uploaded.
Counts are exact for OpenAI models (o200k_base is GPT-4o/4.1/5's tokenizer). For Claude, Gemini and other vendors — whose tokenizers are not public — treat the count as a close estimate (typically within ±15%).
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Cost of this text across popular models
| Model | Input $/1M | Output $/1M | This text (input) | +500 output tokens |
|---|
Close estimate (±15%): Anthropic does not publish its tokenizer, so this count uses OpenAI's o200k_base as an approximation.
Cost lookup — Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)
| Tokens | Cost on Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) |
|---|---|
| 1K input tokens | 0.4¢ |
| 10K input tokens | $0.0400 |
| 100K input tokens | $0.4000 |
| 1M input tokens | $4.00 |
| 1K output tokens | $0.0200 |
| 10K output tokens | $0.2000 |
FAQ
How accurate is the Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) token count?
Close estimate (±15%): Anthropic does not publish its tokenizer, so this count uses OpenAI's o200k_base as an approximation. Paste your own text above to see the exact number for your prompt.
How is Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) API cost calculated?
Cost = (input tokens ÷ 1,000,000) × $4.00 + (output tokens ÷ 1,000,000) × $20.00 — Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)'s official per-1M-token prices from Artificial Analysis.
Does this cover every reasoning-effort tier of Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)?
Pricing shown is for the merged representative tier. Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) groups 5 reasoning-effort variants: Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Xhigh Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, High Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Low Effort, Default Fallback).
See full Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) pricing & benchmarks, or the main token counter for every model.