THE TICKER · ANTHROPIC · CHECKED DAILY · LAST CHANGE 2026-10-13
CLAUDE SONNET 5.5 API PRICING
What Anthropic charges for Claude Sonnet 5.5, in USD, cross-checked daily against the public pricing dataset. Effective price — if there's a promo running, this is the promo.
NOTE: Same list and batch price as the Sonnet 5 it succeeds; cache reads cost half, $0.20 to $0.10/MTok, on the 0.05x multiplier.
WHAT THINGS ACTUALLY COST ON CLAUDE SONNET 5.5
| Scenario | Tokens in / out | 1 run | 1,000 runs |
|---|---|---|---|
| A typical prompt (300 tokens in) | 300 / ~900 | $0.0096 | $9.60 |
| A 20-turn conversation (context re-sent) | 4,000 / ~4,000 | $0.05 | $48.00 |
| Summarizing a 10-page document | 8,000 / ~3,200 | $0.05 | $48.00 |
| One agent run (tools, retries, thinking) | 2,000 / ~12,000 | $0.12 | $124.00 |
| A code review request | 1,500 / ~3,750 | $0.04 | $40.50 |
Output sizes assume the same editorial ratios as the Burn Calculator (3x for prompts, 6x for agent runs). Estimates, not invoices.
VS. THE REST OF THE BOARD
“Same job” = a 1,000-token prompt with a 3,000-token reply, priced on both models. Cheaper is not always better. It is, however, always cheaper.
PRICE HISTORY
Claude Sonnet 5.5 joins the board at $2.00 in / $10.00 out per MTok — identical list, cache and batch rates to the Sonnet 5 it succeeds. No price news is the price news.
Source: platform.claude.com/docs/en/about-claude/pricing · price last confirmed against the daily source on 2026-10-14. The full changelog lives at /pricing/changes.
NOW FIND OUT HOW MUCH OF THAT IS WASTE
Claude Sonnet 5.5's price is fixed. Your token count isn't. Paste a real prompt into the Burn Calculator and see what it costs on Claude Sonnet 5.5 — and how much a leaner version would save at 1,000 runs. Or pull the whole board from the ticker.