Model pricing
Claude Opus 5.5 · Fast mode pricing — cost per token
Claude Opus 5.5 · Fast mode costs $8.00 per million input tokens and $40.00 per million output tokens (USD). This is the fast-mode rate, Anthropic's research-preview option for faster output. It applies across the full context window, prompt-caching multipliers stack on top, and JP the Cat applies it only to turns Claude Code logs as fast. It uses the newer tokenizer, which emits ~30% more tokens for the same text.
| Token rate | USD / 1M tokens |
|---|---|
| Effortqualitative reasoning depth | High |
| Inputper 1M tokens | $8.00 |
| Output | $40.00 |
| Cache write · 5-minuteper 1M tokens | $10.00 |
| Cache write · 1-hourper 1M tokens | $16.00 |
| Cache readper 1M tokens | $0.40 |
Claude Code computes your real per-token cost from local session logs at these rates — no estimate, no upload.
Cache & context economics
Cache reads cost $0.40 per million tokens — about 5% of input. Cache writes cost $10.00 for 5 minutes or $16.00 for 1 hour, per million tokens.
Common questions
- How much does Claude Opus 5.5 · Fast mode cost per million tokens?
- $8.00 input and $40.00 output per million tokens (USD list price).
- When does Claude Opus 5.5 · Fast mode pricing apply?
- Only to turns that ran in fast mode, which Claude Code logs as usage.speed "fast". Standard-speed turns bill at the Claude Opus 5.5 rate.
- Does US-only inference change Claude Opus 5.5 · Fast mode pricing?
- Yes. A request pinned to US-only inference bills every token category at 1.1x these rates. JP the Cat applies it to turns Claude Code logs with inference_geo "us".
- What is the cache-read price for Claude Opus 5.5 · Fast mode?
- $0.40 per million cached-read tokens — about 5% of the input rate.
- How is cache writing priced for Claude Opus 5.5 · Fast mode?
- Cache writes cost $10.00 for 5 minutes or $16.00 for 1 hour, per million tokens.
Track your real cost with JP the Cat
A live menu-bar total, priced to the cent from your local logs — including the cache-write split most tools miss.
Download MeowPrefer Homebrew? Install the same signed, notarized app from JP's public tap.
brew tap 8bittts/jpthecat
brew trust 8bittts/jpthecat
brew install --cask jpthecat