Context Window
1,000,000
Input tokens
Full-context input ≈ $3.00
Model Cost Profile
Developer: anthropic· Tokenizer: Claude · Quantization: unknown
Canonical ID: anthropic/claude-4.5-sonnet-20250929
Pricing updated Apr 24, 2026
Live Pricing
Input: $3.00
Output: $15.00
Last synced Apr 24, 2026 · MMLU score via public benchmark data
Anthropic's Claude Sonnet 4.5 features an extensive context window of 1,000,000 tokens, making it ideal for applications requiring detailed document analysis and long-form content generation. With an input price of $3.00 per million tokens and an output price of $15.00 per million tokens, teams can effectively budget for projects that involve large-scale data processing and complex conversational AI tasks. This model is particularly suited for enterprises needing to handle intricate workflows, such as legal document review or comprehensive customer support interactions.
Provider Compliance
Context Window
1,000,000
Input tokens
Full-context input ≈ $3.00
Max Output
64,000
Completion tokens
Input Price / 1M
$3.00
Prompt tokens
Output Price / 1M
$15.00
Completion tokens
Top Benchmark
77.2
MMLU score — highest of MMLU, GPQA, MATH, HumanEval
Evaluation scores for Anthropic: Claude Sonnet 4.5. The “Top Benchmark” shown above is the highest score across MMLU, GPQA, MATH & HumanEval.
Price History
Current Input / 1M
$3.00
Current Output / 1M
$15.00
Performance History
Current TPS
0.00
Current Latency
0ms
Uptime
100.0%
| Usage Type | Price / 1M Tokens |
|---|---|
| Input (Prompt) | $3.00 |
| Output (Completion) | $15.00 |
| Cache Read | $0.3000 |
| Cache Write | $3.75 |
| Web Search | $10,000.00 |
Estimate monthly spend for Anthropic: Claude Sonnet 4.5 based on your workload.
Estimated Monthly Cost
$255
25M input + 12M output tokens
Quick links for cost-down decisions before production rollout.