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models / Anthropic / Claude Opus 5.5

Claude Opus 5.5

textanthropic/claude-opus-5.5

Claude Opus 5.5 is Anthropic's model for long-running agentic coding and knowledge work. It combines a one million token context window with adaptive thinking that is always on, a 128K token maximum output, and a medium default effort level.

$20.00list priceper 1M output tokens
pricing
unitlist → Elite price
per 1M cache write tokens$5.00
per 1M cached input tokens$0.20
per 1M input tokens$4.00
per 1M output tokens$20.00

No Elite discount on this model right now: everyone pays the list price.

Everyone pays the list price. Reaching Elite (hold or stake 1,337 $XAVA, or hold 1,337,000 $XINF) unlocks the Elite price and a bigger buyback of your token. How it works

openai sdk (python)
from openai import OpenAI

client = OpenAI(
    base_url="https://www.zinf.ai/v1",
    api_key="xk_live_...",  # your Xava Inference key
)

r = client.chat.completions.create(
    model="anthropic/claude-opus-5.5",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)
curl
curl https://www.zinf.ai/v1/chat/completions \
  -H "Authorization: Bearer $XINF_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"anthropic/claude-opus-5.5","messages":[{"role":"user","content":"Hello!"}]}'
limits
providerAnthropic
typetext
context window1,000,000 tokens
max output—
prompt storagenone
provider retentionthe model provider's policy
livesoon
requests 24h—
p50 latency—
uptime 7d—