// event · model
Anthropic launches Claude Sonnet 5.5 — 30% faster, up to 30% cheaper than Sonnet 5
modelvendor: Anthropicpublished: 15d agoconfidence: 0.90id: 0a422ce8-6b67-4583-9752-928a1bb6ac89
Anthropic released Claude Sonnet 5.5, an upgrade over Sonnet 5 that runs about 30% faster and costs up to 30% less for most workloads. Positioned as a drop-in improvement for agents doing coding, reasoning, and tool use at lower latency and price.
capability delta
an agent can now use Claude Sonnet 5.5 for faster, cheaper reasoning — 30% faster and up to 30% lower cost than Sonnet 5 on typical workloads.
// example
python
from anthropic import Anthropic
client = Anthropic()
resp = client.messages.create(
model="claude-sonnet-5-5",
max_tokens=1024,
messages=[{"role": "user", "content": "Summarize the benefits of Sonnet 5.5."}],
)
print(resp.content[0].text)
// links