Claude Opus 5 FastAPI
Opus 5 tuned for latency — same frontier reasoning, faster output, 200K context.
输入价格
$7.00
per 1M tokens
输出价格
$35.00
per 1M tokens
Prompt 缓存
给稳定 prefix 加 cache_control，命中按 input 价的一小部分计费。cache_write 按 input 原价计费。
按 input × 0.1 自动派生
参数
- 模型 ID
claude-opus-5-fast- 端点
POST /v1/chat/completions- 类别
- Text
- 供应商
- Anthropic
- 能力
- visionfunctionstreamingthinkinglong-context
无缝兼容 OpenAI SDK
把 OpenAI SDK 的 base_url 指向 api.kunavo.com/v1，换 model id 即可。流式、工具调用、SDK 行为完全一致。
查看文档Claude API 定价指南立即试用
在 /app/keys 创建 API key，复制为 KUNAVO_API_KEY，然后任选下面一段代码运行。
curl https://api.kunavo.com/v1/chat/completions \
-H "Authorization: Bearer $KUNAVO_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-opus-5-fast",
"messages": [
{"role": "user", "content": "Hello, Claude Opus 5 Fast"}
],
"stream": false
}'Kunavo 与直连 Anthropic 的区别
同一个 Claude Opus 5 Fast，同样的输出。网关改变的是账号、SDK 和账单——下面是如实对照。
| Kunavo | 直连 Anthropic | |
|---|---|---|
| 价格（per 1M tokens） | $7.00 / $35.00 (−30%) | $10.00 / $50.00 |
| 账号 | 一个 Kunavo 账号，2 分钟拿到 Key，最低充值 $5 | 需要 Anthropic 账号，并单独配置其计费 |
| SDK | 继续用 OpenAI SDK——改 base_url，model 填 "claude-opus-5-fast" | Anthropic 官方 SDK，或其提供的 OpenAI 兼容层 |
| 同一个 Key 还能调用 | Claude、Gemini、GPT 以及图像、视频、音频模型 | 仅 Anthropic 自家模型 |
| 计费 | 一个 Stripe 余额，按量付费，余额不过期；失败请求不计费 | 每家厂商一张独立账单 |
| 速率限制 | 共享网关容量，无按账号的合约级限额 | Anthropic 自家档位限额，可凭用量或合约提升 |
如果你需要合约级速率限制、企业 SLA，或首日就要用上厂商独有功能，直连 Anthropic 更合适。如果你想要一个 Key、一张账单，并在所有厂商上拿到更低的单价，就用 Kunavo。
FAQ
How much does Claude Opus 5 Fast cost?
On Kunavo, Claude Opus 5 Fast is $7.00 per 1M input tokens and $35.00 per 1M output tokens — about 30% under Anthropic's official price. Failed requests are never billed, and it's pay-as-you-go — you only pay for successful calls.
Can I call Claude Opus 5 Fast with the OpenAI SDK?
Yes. Set base_url to https://api.kunavo.com/v1, pass your Kunavo key, and set model to "claude-opus-5-fast". Requests and responses are OpenAI-compatible; Claude is also available on the native /v1/messages endpoint.
What endpoint does Claude Opus 5 Fast use?
Claude Opus 5 Fast is called via POST /v1/chat/completions on Kunavo's OpenAI-compatible API.
What is Claude Opus 5 Fast good for?
Claude Opus 5 Fast is a text model from Anthropic, with support for vision, function, streaming, thinking, long-context.
What is different from calling Anthropic directly?
The model is the same, at about 30% under Anthropic's list price. What changes is around it: one key and one Stripe balance instead of a Anthropic account with its own billing, the OpenAI SDK with base_url swapped instead of a provider-specific SDK, and the same key also reaching Claude, Gemini, GPT, image, video and audio models. The tradeoff is that gateway capacity is shared — if you need a contractual rate limit or an enterprise SLA on Claude Opus 5 Fast specifically, go direct to Anthropic.
Is Claude Opus 5 Fast cheaper on Kunavo?
Yes — Claude Opus 5 Fast is about 30% under Anthropic's official list price on Kunavo, with no subscription and no minimum monthly spend. You pay per token from a $5 top-up, failed requests are never billed, and the balance never expires.