Claude Sonnet 4.5 pricing (retired)
Retired model. Anthropic has superseded Claude Sonnet 4.5 — the prices below are the last ones we verified and are kept for reference. Its replacement is Claude Sonnet 5 ($2 / $10 per 1M in / out).
What one task cost on Claude Sonnet 4.5
Per-million-token prices are hard to feel, so here are typical token counts for common jobs priced with Claude Sonnet 4.5. Figures are USD at the rates above and exclude prompt caching and batch discounts.
| Task | Tokens (in / out) | Cost |
|---|---|---|
| Code review of a 500-line pull request | 60,000 / 4,000 | $0.240 |
| Debug one failing test | 40,000 / 6,000 | $0.210 |
| Generate a landing page in one shot | 3,000 / 30,000 | $0.459 |
| Draft a 1,200-word article | 2,000 / 2,500 | $0.043 |
| Answer a question from a 20-page document | 25,000 / 800 | $0.087 |
| Multi-step agent run (10 tool calls) | 250,000 / 25,000 | $1.13 |
| All of the above, once | $2.16 |
Claude Sonnet 4.5 by Anthropic costs $3 per 1M input tokens and $15 per 1M output tokens — about 83.3k tokens per $1. Prices last verified 2026-09-19 (historical).
Claude Sonnet 4.5 key facts
| Provider | Claude pricing |
|---|---|
| Input price | $3 / 1M tokens |
| Output price | $15 / 1M tokens |
| Tokens / $1 | 83.3k |
| Intelligence / $1 | 15,833 |
| Context window | 1.0M tokens |
| Tier | balanced |
| Intelligence index | 19 / 100 |
| Released | 2025-09-29 |
| Last verified | 2026-09-19 |
What Claude Sonnet 4.5 delivers for your budget
For a coding workload, here is roughly what each monthly budget buys:
| Budget | Tokens / month | Months of workload |
|---|---|---|
| $20 | 3.5M | 5.3x |
| $50 | 8.7M | 13.3x |
| $100 | 17.3M | 26.7x |
Other Claude models
How Claude Sonnet 4.5 compares to its closest rivals
Rather than repeating the full catalog on every page, here are the three current models nearest to Claude Sonnet 4.5 on the intelligence index — and why you might still pick one instead:
- Muse Glimmer (high) (Llama) — $0.33 input / $1.35 output per 1M tokens.
- Claude Haiku 4.5 (Claude) — $1 input / $5 output per 1M tokens. Why you might pick it: Fast, cheap Claude for light tasks.
- Mistral Medium 3.5 (Mistral) — $1.50 input / $7.50 output per 1M tokens. Why you might pick it: Mistral's open frontier tier.
Claude Sonnet 4.5 — frequently asked questions
How much does Claude Sonnet 4.5 cost?
Claude Sonnet 4.5 by Anthropic costs $3 per 1M input tokens and $15 per 1M output tokens.
How many tokens per dollar does Claude Sonnet 4.5 give you?
On a typical 1:3 input-to-output mix, Claude Sonnet 4.5 delivers around 83.3k tokens per dollar — an intelligence-per-dollar score of 15833.
What is Claude Sonnet 4.5's context window?
Claude Sonnet 4.5 supports a context window of 1.0M tokens.
Is Claude Sonnet 4.5 worth it in 2026?
Claude Sonnet 4.5 is Claude's balanced tier model. Use the AI Intelligence Calculator to see how its value compares to every other model at your budget.