Claude API Pricing: Opus 5, Sonnet 5 & Haiku 4.5 Rates
Short answer: Anthropic's Claude family costs $1.00–$5.00 per 1M input tokens and $5.00–$25.00 per 1M output tokens. Sonnet 5's introductory $2/$10 rate is now permanent — the planned September 2026 price increase was cancelled.
Claude pricing table
Standard first-party API text rates per 1,000,000 tokens, verified against Anthropic's official pricing documentation.
| Model | Input / 1M | Output / 1M | Context window | Max output | Source |
|---|---|---|---|---|---|
Claude Opus 5 Flagship reasoning | $5.00 | $25.00 | 1,000,000 | 128,000 | Anthropic |
Claude Sonnet 5 Balanced mid-tier | $2.00 | $10.00 | 1,000,000 | 128,000 | Anthropic |
Claude Haiku 4.5Lowest Budget / high-volume | $1.00 | $5.00 | 200,000 | 64,000 | Anthropic |
Prices are informational estimates in USD per Anthropic-published token rates and may exclude caching, batch discounts, tools or taxes. Sonnet 5 rates re-verified 2026-08-16; Opus 5 and Haiku 4.5 rates last fully verified 2026-08-09. The Anthropic invoice is the source of truth.
The Sonnet 5 price increase that never happened.
Anthropic launched Claude Sonnet 5 with introductory pricing of $2.00 / $10.00 per 1M input/output tokens and announced a move to $3.00 / $15.00 on September 1, 2026. In August 2026 that increase was cancelled: the introductory rate simply became the standard rate. If you budgeted for the higher number, your mid-tier Claude workloads are now 33% cheaper on input than planned.
One structural detail matters more than any rate change: Haiku 4.5 caps at a 200K-token context window, while Sonnet 5 and Opus 5 accept 1M. Long-document workloads cannot simply route to the cheapest Claude — check fit before you route.
Your workload on Claude, priced monthly
Pick a preset or enter per-request token volumes and daily requests. All three Claude models are priced side by side.
| Model | Per request | Per day | 30-day estimate |
|---|
Which Claude model fits which workload?
Purely on arithmetic: at document-processing volumes (60K in / 1K out per request, 1K requests a day) Claude Haiku 4.5 runs about $1,950/month where Opus 5 costs $9,750 — a 5x spread for the same token volumes, with Sonnet 5 in between at $3,900. Haiku 4.5 handles classification, extraction and short-form tasks inside its 200K window; Sonnet 5 is the balanced default with the full 1M context; Opus 5 is reserved for the hardest reasoning where output quality justifies the premium.
"Best fit" here is a cost result, not a quality ranking — benchmark quality on your own prompts before routing production traffic. Compare Claude against the other providers on the LLM API Pricing Comparison page.
Recent Claude pricing changes
Claude API pricing questions
How much does the Claude API cost?
Claude models cost $1.00–$5.00 per 1M input tokens and $5.00–$25.00 per 1M output tokens at standard rates: Claude Haiku 4.5 at $1.00/$5.00, Claude Sonnet 5 at $2.00/$10.00, and Claude Opus 5 at $5.00/$25.00.
What is the cheapest Claude API model?
Claude Haiku 4.5 is the cheapest Claude model at $1.00 per 1M input and $5.00 per 1M output tokens — 5x cheaper than the flagship Claude Opus 5 — though its context window is 200K tokens versus 1M on Sonnet 5 and Opus 5.
Did Claude Sonnet 5 pricing change in 2026?
Yes. Anthropic launched Sonnet 5 with introductory pricing of $2.00/$10.00 per 1M input/output tokens and had scheduled an increase to $3.00/$15.00 for September 1, 2026. That increase was cancelled in August 2026, and the $2.00/$10.00 rate is now the standard price.
Claude Opus 5 vs Sonnet 5: which should I use?
On cost alone, Sonnet 5 ($2.00/$10.00) is 2.5x cheaper than Opus 5 ($5.00/$25.00) on both input and output, with the same 1M-token context window. Opus 5 is the flagship for the hardest reasoning tasks; route traffic to it selectively and benchmark quality on your own prompts before committing.
How does Claude pricing compare to OpenAI and Gemini?
At flagship level, Claude Opus 5 ($5.00/$25.00) matches GPT-5.6 Sol on input and undercuts it on output ($25 vs $30). At mid tier, Sonnet 5 ($2.00/$10.00) beats GPT-5.6 Terra ($2.00/$12.00) on output. Budget models are cheaper elsewhere: GPT-5.6 Luna ($0.20/$1.20) and Gemini 3.5 Flash-Lite ($0.30/$2.50) both undercut Haiku 4.5 ($1.00/$5.00). See the LLM API Pricing Comparison page for the full table, or the OpenAI and Gemini deep dives.
Where these numbers come from.
All rates are taken from Anthropic's official pricing documentation and re-verified weekly. The calculator multiplies your token volumes by published per-million-token rates; it does not estimate tokenization and does not apply caching or batch discounts.
Official source: Anthropic pricing. Always confirm the Anthropic invoice before making purchasing decisions.