Step 2: Supply your schema in the API call
To use Structured Outputs, simply specify
json
text: { format: { type: "json_schema", "strict": true, "schema": … } }For example:
javascript
const response = await openai.responses.create({
model: "gpt-6-astra",
input: [
{
role: "system",
content:
"You are a helpful math tutor. Guide the user through the solution step by step.",
},
{ role: "user", content: "how can I solve 8x + 7 = -23" },
],
text: {
format: {
type: "json_schema",
name: "math_response",
schema: {
type: "object",
properties: {
steps: {
type: "array",
items: {
type: "object",
properties: {
explanation: { type: "string" },
output: { type: "string" },
},
required: ["explanation", "output"],
additionalProperties: false,
},
},
final_answer: { type: "string" },
},
required: ["steps", "final_answer"],
additionalProperties: false,
},
strict: true,
},
},
});
console.log(response.output_text);python
response = client.responses.create(
model="gpt-6-astra",
input=[
{
"role": "system",
"content": "You are a helpful math tutor. Guide the user through the solution step by step.",
},
{"role": "user", "content": "how can I solve 8x + 7 = -23"},
],
text={
"format": {
"type": "json_schema",
"name": "math_response",
"schema": {
"type": "object",
"properties": {
"steps": {
"type": "array",
"items": {
"type": "object",
"properties": {
"explanation": {"type": "string"},
"output": {"type": "string"},
},
"required": ["explanation", "output"],
"additionalProperties": False,
},
},
"final_answer": {"type": "string"},
},
"required": ["steps", "final_answer"],
"additionalProperties": False,
},
"strict": True,
},
},
)
print(response.output_text)go
package main
import (
"context"
"fmt"
"github.com/openai/openai-go/v3"
"github.com/openai/openai-go/v3/responses"
)
func main() {
client := openai.NewClient()
response, err := client.Responses.New(context.Background(), responses.ResponseNewParams{
Model: "gpt-6-astra",
Input: responses.ResponseNewParamsInputUnion{OfInputItemList: responses.ResponseInputParam{
responses.ResponseInputItemParamOfMessage(
responses.ResponseInputMessageContentListParam{responses.ResponseInputContentParamOfInputText("You are a helpful math tutor. Guide the user through the solution step by step.")},
responses.EasyInputMessageRoleSystem,
),
responses.ResponseInputItemParamOfMessage(
responses.ResponseInputMessageContentListParam{responses.ResponseInputContentParamOfInputText("how can I solve 8x + 7 = -23")},
responses.EasyInputMessageRoleUser,
),
}},
Text: responses.ResponseTextConfigParam{Format: responses.ResponseFormatTextConfigUnionParam{
OfJSONSchema: &responses.ResponseFormatTextJSONSchemaConfigParam{Name: "math_response", Schema: mathSchema(), Strict: openai.Bool(true)},
}},
})
if err != nil {
panic(err)
}
fmt.Println(response.OutputText())
}
func mathSchema() map[string]any {
return map[string]any{
"type": "object",
"properties": map[string]any{
"steps": map[string]any{"type": "array", "items": map[string]any{"type": "object", "properties": map[string]any{"explanation": map[string]any{"type": "string"}, "output": map[string]any{"type": "string"}}, "required": []string{"explanation", "output"}, "additionalProperties": false}},
"final_answer": map[string]any{"type": "string"},
},
"required": []string{"steps", "final_answer"},
"additionalProperties": false,
}
}java
import com.openai.client.OpenAIClient;
import com.openai.client.okhttp.OpenAIOkHttpClient;
import com.openai.core.JsonValue;
import com.openai.models.responses.EasyInputMessage;
import com.openai.models.responses.ResponseCreateParams;
import com.openai.models.responses.ResponseFormatTextJsonSchemaConfig;
import com.openai.models.responses.ResponseInputItem;
import com.openai.models.responses.ResponseTextConfig;
import java.util.List;
import java.util.Map;
Map<String, Object> schema =
Map.of(
"type",
"object",
"properties",
Map.of(
"steps",
Map.of(
"type",
"array",
"items",
Map.of(
"type",
"object",
"properties",
Map.of(
"explanation", Map.of("type", "string"),
"output", Map.of("type", "string")),
"required",
List.of("explanation", "output"),
"additionalProperties",
false)),
"final_answer", Map.of("type", "string")),
"required",
List.of("steps", "final_answer"),
"additionalProperties",
false);
ResponseCreateParams params =
ResponseCreateParams.builder()
.model("gpt-6-astra")
.inputOfResponse(
List.of(
ResponseInputItem.ofEasyInputMessage(
EasyInputMessage.builder()
.role(EasyInputMessage.Role.SYSTEM)
.content(
"You are a helpful math tutor. Guide the user through the solution step by step.")
.build()),
ResponseInputItem.ofEasyInputMessage(
EasyInputMessage.builder()
.role(EasyInputMessage.Role.USER)
.content("How can I solve 8x + 7 = -23?")
.build())))
.text(
ResponseTextConfig.builder()
.format(
ResponseFormatTextJsonSchemaConfig.builder()
.name("math_response")
.strict(true)
.schema(
JsonValue.from(schema)
.convert(ResponseFormatTextJsonSchemaConfig.Schema.class))
.build())
.build())
.build();
client.responses().create(params).output().stream()
.flatMap(item -> item.message().stream())
.flatMap(message -> message.content().stream())
.flatMap(content -> content.outputText().stream())
.forEach(text -> System.out.println(text.text()));csharp
using System.Text.Json;
using OpenAI.Responses;
#pragma warning disable OPENAI001
string key = Environment.GetEnvironmentVariable("OPENAI_API_KEY")!;
ResponsesClient client = new(key);
BinaryData schema = BinaryData.FromString(
"""
{
"type": "object",
"properties": {
"steps": {
"type": "array",
"items": {
"type": "object",
"properties": {
"explanation": { "type": "string" },
"output": { "type": "string" }
},
"required": ["explanation", "output"],
"additionalProperties": false
}
},
"final_answer": { "type": "string" }
},
"required": ["steps", "final_answer"],
"additionalProperties": false
}
"""
);
CreateResponseOptions options = new()
{
Model = "gpt-6-astra",
TextOptions = new ResponseTextOptions
{
TextFormat = ResponseTextFormat.CreateJsonSchemaFormat(
"math_response",
schema,
jsonSchemaIsStrict: true
),
},
};
options.InputItems.Add(ResponseItem.CreateSystemMessageItem("You are a helpful math tutor. Guide the user through the solution step by step."));
options.InputItems.Add(ResponseItem.CreateUserMessageItem("How can I solve 8x + 7 = -23?"));
ResponseResult response = await client.CreateResponseAsync(options);
using JsonDocument parsed = JsonDocument.Parse(response.GetOutputText());
Console.WriteLine(parsed.RootElement);ruby
require "openai"
client = OpenAI::Client.new
math_schema = {
type: :object,
properties: {
steps: {
type: :array,
items: {
type: :object,
properties: {
explanation: {type: :string},
output: {type: :string}
},
required: %w[explanation output],
additionalProperties: false
}
},
final_answer: {type: :string}
},
required: %w[steps final_answer],
additionalProperties: false
}
response = client.responses.create(
model: "gpt-6-astra",
input: [
{
role: :system,
content: "You are a helpful math tutor. Guide the user through the solution step by step."
},
{role: :user, content: "How can I solve 8x + 7 = -23?"}
],
text: {
format: {
type: :json_schema,
name: "math_response",
strict: true,
schema: math_schema
}
}
)
puts(response.output_text)bash
curl https://api.openai.com/v1/responses \
-H "Authorization: Bearer $OPENAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-6-astra",
"input": [
{
"role": "system",
"content": "You are a helpful math tutor. Guide the user through the solution step by step."
},
{
"role": "user",
"content": "how can I solve 8x + 7 = -23"
}
],
"text": {
"format": {
"type": "json_schema",
"name": "math_response",
"schema": {
"type": "object",
"properties": {
"steps": {
"type": "array",
"items": {
"type": "object",
"properties": {
"explanation": { "type": "string" },
"output": { "type": "string" }
},
"required": ["explanation", "output"],
"additionalProperties": false
}
},
"final_answer": { "type": "string" }
},
"required": ["steps", "final_answer"],
"additionalProperties": false
},
"strict": true
}
}
}'Note: the first request you make with any schema will have additional latency as our API processes the schema, but subsequent requests with the same schema will not have additional latency.