Model pricing · Anthropic
Claude Sonnet 5 pricing
Claude Sonnet 5 costs $2 per million input tokens and $10 per million output tokens at list price. Best for: coding default — intro pricing.
| Input | $2 / 1M tokens |
|---|---|
| Output | $10 / 1M tokens |
| Cached input (read) | $0.2 / 1M tokens |
| Cache write | $2.5 / 1M tokens |
| Context window | 1,000,000 tokens |
Intro pricing through 2026-08-31; $3/$15 after. New tokenizer ~30% more tokens per text than Sonnet 4.6.
Source: Anthropic pricing, cross-checked against models.dev on 2026-09-15. Your provider invoice is authoritative.
What it costs in practice
| Workload | List price | If input is cached |
|---|---|---|
| One request: 10,000 tokens in, 1,000 out | $0.030 | $0.012 |
| A month of that request, 100 times a day | $90.00 | $36.00 |
| A 3,000-token instruction file on 100 requests a day, for a month | $18.00 | $1.80 |
The last row is the always-on cost of an instruction file like CLAUDE.md: paid on every request, whether the task needs it or not. Check how much of yours is waste.
Price history
From tokencheat's dated pricing snapshots. Only changes are listed.
| Since | Input / 1M | Output / 1M |
|---|---|---|
| 2026-01-01 | $2 | $10 |
Similarly priced models
Gemini 3.1 Pro (Preview)
$2 in · $12 out · Google
GPT-5.3 Codex
$1.75 in · $14 out · OpenAI
GPT-5.4
$2.5 in · $15 out · OpenAI
Gemini 3.5 Flash
$1.5 in · $9 out · Google
Compare every model side by side or price your own workload.