StarAPI

claude-opus-5-5 API

Call claude-opus-5-5 through a single OpenAI-compatible endpoint — one key, no separate vendor account, no multi-provider wiring.

AnthropicChatReasoningCodingVision

Pricing

Prices are per 1M tokens in USD · ¥6.5 = $1 · Billed in CNY

Anthropic

Claude models are the usual pick for long-document reasoning and agentic coding. StarSeaAPI terminates the Anthropic Messages protocol natively, so Claude Code and other Anthropic-native clients work without a translation layer.

When to use it

At $4.00 per 1M input tokens it sits well above the catalogue median of $0.69 — a capability-first choice. Best for coding agents and repository-scale edits. Every model here is reachable with the same API key, so trialling it against a stronger sibling costs one line of code.

Code

from openai import OpenAI
client = OpenAI(
  base_url="https://starseaapi.com/v1",
  api_key="sk-your-key"
)
r = client.chat.completions.create(
  model="claude-opus-5-5",
  messages=[{"role": "user", "content": "Explain prefix caching in one paragraph"}]
)
print(r.choices[0].message.content)

Integrations · Quickstart

Other models from this provider

Models	Input $/M	Output $/M	Intelligence index	Coding index
claude-sonnet-5	$2.00	$10.00	45.1	71.5
claude-sonnet-4-6	$3.00	$15.00	—	—
claude-opus-4-6	$5.00	$25.00	—	—
claude-opus-4-7	$5.00	$25.00	—	—
claude-opus-4-8	$5.00	$25.00	—	—
claude-opus-5	$5.00	$25.00	54.1	78.0

Head-to-head comparisons

Capabilities