Claude Sonnet 4.5

anthropic/claude-sonnet-4.5
by Anthropic · text+image+file in · text out · 1M ctx · 2025-09-29

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents…

Endpoints:/v1/chat/completions/v1/messages
INPUT$3.00/ 1M tokens
OUTPUT$15.00/ 1M tokens
p50 TTFT1.84 s7d
p95 TTFT6.08 s7d
TRAFFIC109.9Ktokens / 7d
▶ Try in playground</> Use via API
Code samples
from openai import OpenAI

client = OpenAI(
    base_url="https://orcarouter.ai/v1",
    api_key="$ORCAROUTER_API_KEY",
)

response = client.chat.completions.create(
    model="anthropic/claude-sonnet-4.5",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)
Pricing
Input / 1M tokens$3.00
Output / 1M tokens$15.00
Cache read / 1M$0.300
Cache write / 1M$3.75
CurrencyUSD
Performancelast 7 days
TTFT p50
1.84 s
Output speed
45.4 tok/s
TTFT p95
6.08 s
Error rate
0%
Public benchmarksLast evaluated 2025-09-29
AA Coding
33.5
AA Intelligence
37.1
AA Math
37.0
AIME 2025
37.0
GPQA Diamond
72.7
Humanity's Last Exam
7.1
IFBench
42.7
LiveCodeBench
59.0
Long-Context Recall
51.3
MMLU-Pro
86.0
SciCode
42.8
TerminalBench Hard
28.8
τ²-Bench
70.5
Source: artificialanalysis.ai
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FAQ
How much does Anthropic: Claude Sonnet 4.5 cost on OrcaRouter?
Anthropic: Claude Sonnet 4.5 is priced at $3.00 per 1M input tokens and $15.00 per 1M output tokens via OrcaRouter. Pricing is pulled live from the routing layer.
What is Anthropic: Claude Sonnet 4.5's context window?
Anthropic: Claude Sonnet 4.5 supports a context window of 1M tokens. Use long-context features (RAG, summarisation) up to that limit.
How do I call Anthropic: Claude Sonnet 4.5 via the OpenAI SDK?
Set OpenAI base_url to https://orcarouter.ai/v1, supply your OrcaRouter API key, and pass model="anthropic/claude-sonnet-4.5" in the chat.completions.create call.
Does OrcaRouter rate-limit Anthropic: Claude Sonnet 4.5?
Per-model rate limits follow your OrcaRouter plan. Free tiers ship with conservative caps; paid tiers lift them. Check /pricing for current quotas.
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