Bekerja dengan Messages API
Lihat referensi API untuk dokumentasi lengkap tentang parameter yang tersedia.
Panduan ini mencakup pola umum untuk bekerja dengan Messages API, termasuk permintaan dasar, percakapan multi-giliran, teknik prefill, dan kemampuan vision. Untuk spesifikasi API lengkap, lihat referensi Messages API.
Permintaan dan respons dasar
#!/bin/sh
curl https://api.anthropic.com/v1/messages \
--header "x-api-key: $ANTHROPIC_API_KEY" \
--header "anthropic-version: 2023-06-01" \
--header "content-type: application/json" \
--data \
'{
"model": "claude-sonnet-4-5",
"max_tokens": 1024,
"messages": [
{"role": "user", "content": "Hello, Claude"}
]
}'import anthropic
message = anthropic.Anthropic().messages.create(
model="claude-sonnet-4-5",
max_tokens=1024,
messages=[
{"role": "user", "content": "Hello, Claude"}
]
)
print(message)import Anthropic from '@anthropic-ai/sdk';
const anthropic = new Anthropic();
const message = await anthropic.messages.create({
model: 'claude-sonnet-4-5',
max_tokens: 1024,
messages: [
{"role": "user", "content": "Hello, Claude"}
]
});
console.log(message);{
"id": "msg_01XFDUDYJgAACzvnptvVoYEL",
"type": "message",
"role": "assistant",
"content": [
{
"type": "text",
"text": "Hello!"
}
],
"model": "claude-sonnet-4-5",
"stop_reason": "end_turn",
"stop_sequence": null,
"usage": {
"input_tokens": 12,
"output_tokens": 6
}
}Beberapa giliran percakapan
Messages API bersifat stateless, yang berarti Anda selalu mengirim riwayat percakapan lengkap ke API. Anda dapat menggunakan pola ini untuk membangun percakapan dari waktu ke waktu. Giliran percakapan sebelumnya tidak harus benar-benar berasal dari Claude — Anda dapat menggunakan pesan assistant sintetis.
#!/bin/sh
curl https://api.anthropic.com/v1/messages \
--header "x-api-key: $ANTHROPIC_API_KEY" \
--header "anthropic-version: 2023-06-01" \
--header "content-type: application/json" \
--data \
'{
"model": "claude-sonnet-4-5",
"max_tokens": 1024,
"messages": [
{"role": "user", "content": "Hello, Claude"},
{"role": "assistant", "content": "Hello!"},
{"role": "user", "content": "Can you describe LLMs to me?"}
]
}'{
"id": "msg_018gCsTGsXkYJVqYPxTgDHBU",
"type": "message",
"role": "assistant",
"content": [
{
"type": "text",
"text": "Sure, I'd be happy to provide..."
}
],
"stop_reason": "end_turn",
"stop_sequence": null,
"usage": {
"input_tokens": 30,
"output_tokens": 309
}
}Memasukkan kata-kata ke mulut Claude
Anda dapat mengisi sebagian respons Claude di posisi terakhir dari daftar pesan input. Ini dapat digunakan untuk membentuk respons Claude. Contoh di bawah ini menggunakan "max_tokens": 1 untuk mendapatkan satu jawaban pilihan ganda dari Claude.
#!/bin/sh
curl https://api.anthropic.com/v1/messages \
--header "x-api-key: $ANTHROPIC_API_KEY" \
--header "anthropic-version: 2023-06-01" \
--header "content-type: application/json" \
--data \
'{
"model": "claude-sonnet-4-5",
"max_tokens": 1,
"messages": [
{"role": "user", "content": "What is latin for Ant? (A) Apoidea, (B) Rhopalocera, (C) Formicidae"},
{"role": "assistant", "content": "The answer is ("}
]
}'{
"id": "msg_01Q8Faay6S7QPTvEUUQARt7h",
"type": "message",
"role": "assistant",
"content": [
{
"type": "text",
"text": "C"
}
],
"model": "claude-sonnet-4-5",
"stop_reason": "max_tokens",
"stop_sequence": null,
"usage": {
"input_tokens": 42,
"output_tokens": 1
}
}Vision
Claude dapat membaca teks dan gambar dalam permintaan. Kami mendukung tipe sumber base64 dan url untuk gambar, serta tipe media image/jpeg, image/png, image/gif, dan image/webp. Lihat panduan vision kami untuk detail lebih lanjut.
#!/bin/sh
# Opsi 1: Gambar yang dikodekan base64
IMAGE_URL="https://upload.wikimedia.org/wikipedia/commons/a/a7/Camponotus_flavomarginatus_ant.jpg"
IMAGE_MEDIA_TYPE="image/jpeg"
IMAGE_BASE64=$(curl "$IMAGE_URL" | base64)
curl https://api.anthropic.com/v1/messages \
--header "x-api-key: $ANTHROPIC_API_KEY" \
--header "anthropic-version: 2023-06-01" \
--header "content-type: application/json" \
--data \
'{
"model": "claude-sonnet-4-5",
"max_tokens": 1024,
"messages": [
{"role": "user", "content": [
{"type": "image", "source": {
"type": "base64",
"media_type": "'$IMAGE_MEDIA_TYPE'",
"data": "'$IMAGE_BASE64'"
}},
{"type": "text", "text": "What is in the above image?"}
]}
]
}'
# Opsi 2: Gambar yang direferensikan URL
curl https://api.anthropic.com/v1/messages \
--header "x-api-key: $ANTHROPIC_API_KEY" \
--header "anthropic-version: 2023-06-01" \
--header "content-type: application/json" \
--data \
'{
"model": "claude-sonnet-4-5",
"max_tokens": 1024,
"messages": [
{"role": "user", "content": [
{"type": "image", "source": {
"type": "url",
"url": "https://upload.wikimedia.org/wikipedia/commons/a/a7/Camponotus_flavomarginatus_ant.jpg"
}},
{"type": "text", "text": "What is in the above image?"}
]}
]
}'{
"id": "msg_01EcyWo6m4hyW8KHs2y2pei5",
"type": "message",
"role": "assistant",
"content": [
{
"type": "text",
"text": "This image shows an ant, specifically a close-up view of an ant. The ant is shown in detail, with its distinct head, antennae, and legs clearly visible. The image is focused on capturing the intricate details and features of the ant, likely taken with a macro lens to get an extreme close-up perspective."
}
],
"model": "claude-sonnet-4-5",
"stop_reason": "end_turn",
"stop_sequence": null,
"usage": {
"input_tokens": 1551,
"output_tokens": 71
}
}Penggunaan tool, mode JSON, dan penggunaan komputer
Lihat panduan kami untuk contoh cara menggunakan tool dengan Messages API. Lihat panduan penggunaan komputer kami untuk contoh cara mengontrol lingkungan komputer desktop dengan Messages API.