SONNET LEGACY200K CONTEXTTEXT + VISIONPROMPT CACHINGBATCH -50%
Claude Sonnet 4.5 API Pricing
Live API pricing for Claude Sonnet 4.5: $3/M input, $15/M output, and $0.3/M cache-hit input. Sonnet 4.5 remains active at the standard Sonnet price band and is useful for stable migrations that have not moved to Sonnet 4.6 yet. Pulled directly from platform.claude.com daily.
Input - per 1M tokens
$3.00/M
Stable Anthropic table flat
Output - per 1M tokens
$15.00/M
Stable since launch flat
Cached input - 90% off
$0.30/M
Cache 5min or 1h -90%
Effective - agentic blend
$1.92/M
92/8 split - 82% cache
§ 01 / TERMINAL
Run the numbers.
Live calculator pre-loaded with Claude Sonnet 4.5 rates. Tweak spend, output mix, or cache hit rate; share the URL to share the calculation.
$ /mo
Workload split
Prompt cache hit rate
Tokens you can process
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Words equivalent (English)
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Effective rate
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§ 02 / SCENARIOS
Real-world presets.
CODING AGENT
Repo-wide bug fix
$0.169/task
LONG DOC ANALYSIS
Reading 100-page contracts
$0.258/doc
RAG SUPPORT
Support agent ticket triage
$0.011/ticket
ASSISTANT
Research planning turn
$0.032/turn
§ 03 / TAPE
Price history.
Input · $3/M
Output · $15/M
Cached · $0.30/M
SEP 29 Launch at $3/M - $15/MMAY 18 Verified unchanged
§ 04 / TOKENIZER
Paste text. See tokens. See cost.
Estimate · anthropic-bpe-estimate · ≈3.5 chars/token Auto-counts as you type
This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.
Characters —
Words —
Tokens (estimated) —
Cost as input · uncached —
Cost as output · uncached —
Cost as cached input —
| Model | Input /M | Output /M | Effective blended | Context | Best for |
|---|---|---|---|---|---|
| Claude Opus 4.7 | $5.00 cache $0.50 | $25.00 | $3.21 pricier | 1M | Frontier reasoning and hard code |
| Claude Opus 4.6 | $5.00 cache $0.50 | $25.00 | $3.21 pricier | 1M | Frontier reasoning and hard code |
| Claude Opus 4.5 | $5.00 cache $0.50 | $25.00 | $3.21 pricier | 200K | Frontier reasoning and hard code |
| Claude Opus 4.1 | $15.00 cache $1.50 | $75.00 | $9.62 pricier | 200K | Legacy Opus workloads |
| Claude Sonnet 4.6 | $3.00 cache $0.30 | $15.00 | $1.92 same blend | 1M | Production agents and coding |
| Claude Sonnet 4.5 Current | $3.00 cache $0.30 | $15.00 | $1.92 agentic 92/8 | 200K | Production agents and coding |
| Claude Haiku 4.5 | $1.00 cache $0.10 | $5.00 | $0.64 cheaper | 200K | Support and classification |
| GPT-5.4 | $2.50 cache $0.25 | $15.00 | $1.80 cheaper | 1.05M | Tool use and app agents |
| Gemini 2.5 Pro | $1.25 cache $0.13 | $10.00 | $1.10 cheaper | 2M | Long-context document analysis |
Frequently asked.
Practical pricing questions, with vendor list prices separated from workload assumptions.
Q · 01 What is Claude Sonnet 4.5 priced at? +
Anthropic's pricing page lists
$3/M input, $15/M output, and $0.3/M cache-hit input for Claude Sonnet 4.5. Under the 92/8 agentic blend with 82% cache hits, that works out to $1.923/M.Q · 02 How does prompt caching change the price? +
Cache hits are listed at
$0.3/M, which is 10% of the $3/M base input rate. Anthropic also charges cache writes at $3.75/M for 5-minute writes and $6/M for 1-hour writes. The calculator models repeated prompt sections as cache hits.Q · 03 Is there a Batch API discount? +
Yes. Anthropic's Batch API gives a 50% discount on input and output tokens. For Claude Sonnet 4.5, the batch table maps to
$1.5/M input and $7.5/M output.Q · 04 Does long context cost extra? +
This page uses the model's documented
200K context label. Longer-context Opus 4.6, Opus 4.7, and Sonnet 4.6 use standard pricing across the full 1M window. Prompt caching and batch discounts still apply according to their normal rules.Q · 05 Does regional pricing differ? +
For first-party Claude API US-only inference, Anthropic applies a
1.1x multiplier to all token categories for this generation. Bedrock and Vertex AI publish their own regional pricing policies.Q · 06 Are volume discounts published? +
No fixed public volume-discount ladder is published. Enterprise and committed-spend contracts can have private terms, but standard API users should assume the list prices shown here unless they have a separate agreement.
Q · 07 How accurate is the tokenizer estimate? +
The live counter uses a Claude-family English estimate of
4.875 characters per token. Actual billing uses Anthropic's server-side tokenizer; code, tables, and non-English text can differ materially.