Using Pydantic with Qwen3 Max Instruct on OpenRouter
This tutorial explains how to use a Pydantic schema to extract structured data using Qwen3 Max.
Please read this tutorial first to understand the basic setup
Code:
import os
import json
import requests
import datetime
from inputs import get_input_text
from system import system_instruction_1 as system_instruction
from schema import VAERSReport
from dotenv import load_dotenv
import time
load_dotenv()
model_name = 'qwen/qwen3-max'
api_key = os.getenv("OPENROUTER_API_KEY")
json_schema_text = json.dumps(VAERSReport.model_json_schema(), indent=2)
input_text, sentence_map = get_input_text()
prompt = f"""
Report: {input_text}
JSON Schema:
{json_schema_text}
"""
url = "https://openrouter.ai/api/v1/chat/completions"
headers = {
"Authorization": f"Bearer {api_key}",
"Content-Type": "application/json",
"HTTP-Referer": "https://botflo.com/", # Optional. Site URL for rankings on openrouter.ai.
"X-Title": "LLM Accuracy Comparisons for Structured Outputs", # Optional
}
payload = {
"model": model_name,
"messages": [
{"role": "system", "content": f'{system_instruction}'},
{"role": "user", "content": f'{prompt}'}
],
"reasoning": {
"effort": "high"
}
}
before = time.time()
response_full = requests.post(url, headers=headers, data=json.dumps(payload))
elapsed = time.time() - before
response = response_full.json()
metadata = {
"metrics": {
"elapsed": elapsed,
"usage": response['usage']
},
"text": {
"system_instruction": system_instruction,
"sentence_map": sentence_map,
"json_schema_text": json_schema_text
}
}
response["metadata"] = metadata
response_file_name = f"responses/response_{model_name.replace('/', '-')}.json"
with open(response_file_name, 'w+') as f:
json.dump(response, f, indent=2)
output_text = response.get('choices')[0].get('message').get('content')
print(output_text)
input_file_name = f"inputs/input_{model_name.replace('/', '-')}.txt"
with open(input_file_name, 'w+') as f:
f.write(input_text)
output_file_name = f"outputs/output_{model_name.replace('/', '-')}.txt"
with open(output_file_name, 'w+') as f:
f.write(output_text)
LLM Response:
```json
{
"timeline": {
"date_of_vaccination": {
"year": 1999,
"month": 6,
"citations": [42],
"explanation": "Last dose of Hepatitis B (Engerix-B) administered on 1999-06-30 per paragraph [42]."
},
"regression_onset_date": {
"year": 2001,
"month": 10,
"citations": [146, 147],
"explanation": "Parents reported regression began between 21-23 months of age; child was born in late December 1998 (31.5 weeks gestation), so 21-23 months corresponds to approx. Oct-Nov 2000; however, paragraph [150] references autism diagnosis 'recently' as of Feb 2001, and paragraph [126] notes new behaviors 'very recently' as of Oct 2000 evaluation. For conservative estimate aligned with [146], we use 22 months => Oct 2000 (age-adjusted would be ~20 months, but parent-reported chronological age used here). However, [150] says 'recently diagnosed' on 2/13/01, and [146] says regression started 21-23 months, so midpoint 22 months = Oct 2000. But [160] and [162] indicate autism persisted as of July 2002, but do not clarify onset. We choose October 2000 as best estimate."
},
"diagnosis_date": {
"year": 2001,
"month": 2,
"citations": [150],
"explanation": "Autism diagnosis reported on 2/13/01 per [150]."
},
"age_at_vaccination_months": {
"value": 6.0,
"citations": [42],
"explanation": "Child born ~Dec 1998 (31.5 weeks gestation, delivered ~Dec 23, 1998); vaccinated on 1999-06-30 → ~6 months old."
},
"age_at_diagnosis_months": {
"value": 26,
"citations": [150],
"explanation": "Diagnosed Feb 2001; born Dec 1998 → ~26 months old."
}
},
"developmental_milestones": [
{
"milestone_name": {
"value": "single_words",
"citations": [41],
"explanation": "Started saying a few single words at ~17 months chronological (15 adjusted)."
},
"milestone_type": "language",
"milestone_age_in_months": {
"value": 17,
"citations": [41],
"explanation": "Chronological age reported."
},
"milestone_has_regressed": {
"value": true,
"citations": [110, 111, 115, 123],
"explanation": "Parents reported decrease in joint attention, social play, and spontaneous speech."
},
"regression_start_date_in_months": {
"value": 22,
"citations": [146, 147],
"explanation": "Regression reported between 21-23 months; midpoint used."
},
"progressed_after_regression": {
"value": false,
"citations": [160, 162],
"explanation": "Autism persisted as of July 2002; no recovery noted."
}
},
{
"milestone_name": {
"value": "walking",
"citations": [41],
"explanation": "Walked by 12 months chronological (10 adjusted)."
},
"milestone_type": "adaptive_behavior",
"milestone_age_in_months": {
"value": 12,
"citations": [41],
"explanation": "Chronological age."
},
"milestone_has_regressed": {
"value": false,
"citations": [],
"explanation": "No motor regression reported."
},
"regression_start_date_in_months": {
"value": null,
"citations": null,
"explanation": null
},
"progressed_after_regression": {
"value": null,
"citations": null,
"explanation": null
}
},
{
"milestone_name": {
"value": "joint_attention",
"citations": [110, 116, 117],
"explanation": "Previously used gestures and initiated joint attention, but frequency decreased."
},
"milestone_type": "social_communication",
"milestone_age_in_months": {
"value": 18,
"citations": [110],
"explanation": "Implied prior to regression at ~22 months."
},
"milestone_has_regressed": {
"value": true,
"citations": [110, 111],
"explanation": "Parents noted decline in joint attention behaviors."
},
"regression_start_date_in_months": {
"value": 22,
"citations": [146, 147],
"explanation": "Aligned with reported regression window."
},
"progressed_after_regression": {
"value": false,
"citations": [160, 162],
"explanation": "No recovery documented."
}
},
{
"milestone_name": {
"value": "pretend_play",
"citations": [121, 122, 123],
"explanation": "Demonstrated beginning pretend play during evaluation, but parents reported significant decrease recently."
},
"milestone_type": "social_communication",
"milestone_age_in_months": {
"value": 20,
"citations": [123],
"explanation": "Reported as prior behavior before recent decline (~20 months)."
},
"milestone_has_regressed": {
"value": true,
"citations": [123],
"explanation": "Play decreased significantly in weeks before Oct 2000 evaluation."
},
"regression_start_date_in_months": {
"value": 22,
"citations": [146, 147],
"explanation": "Consistent with overall regression timeline."
},
"progressed_after_regression": {
"value": false,
"citations": [160, 162],
"explanation": "No recovery noted."
}
}
],
"regression_record": {
"pre_regression_language_level": {
"value": "babbling_single_words",
"citations": [41, 115],
"explanation": "Used single words like 'car', 'choo choo', 'hi dada' before regression."
},
"pre_regression_social_communication_level": {
"value": "reciprocal_interaction",
"citations": [103, 104, 105, 109, 110],
"explanation": "Showed social engagement, responded to name, greeted father, played with brothers."
},
"pre_regression_adaptive_behavior_level": {
"value": "moderate_independence",
"citations": [41, 125],
"explanation": "Walked, played with puzzles/books, self-fed to some extent."
},
"post_regression_language_level": {
"value": "babbling_single_words",
"citations": [114, 115],
"explanation": "Still used some single words but not flexible phrase speech; primarily grunting/screaming."
},
"post_regression_social_communication_level": {
"value": "basic_engagement",
"citations": [108, 113, 116],
"explanation": "Responded to name, showed objects with eye contact, but limited joint attention and social reciprocity."
},
"post_regression_adaptive_behavior_level": {
"value": "basic_self_help",
"citations": [128, 140],
"explanation": "Daily living and motor skills rated ~15 months; required support."
},
"has_language_loss": {
"value": true,
"citations": [110, 115, 118, 119, 120],
"explanation": "Parents noted reduced spontaneous speech; receptive/expression delays noted."
},
"has_social_loss": {
"value": true,
"citations": [110, 111, 123],
"explanation": "Decreased joint attention, social play, and interaction with peers."
},
"has_adaptive_loss": {
"value": true,
"citations": [127, 128, 141, 142],
"explanation": "Adaptive behavior in 'Borderline Impaired range'; sensory processing issues affected self-care."
},
"has_repetitive_behaviors": {
"value": true,
"citations": [126, 148, 151],
"explanation": "Began lining up toys; rated 'moderate' autism on ATEC due to repetitive behaviors."
}
},
"early_vaccination_symptoms": null,
"diagnosis_record": {
"asd_severity": {
"value": 2,
"citations": [151],
"explanation": "Rated 'moderate' autism on Autism Treatment Evaluation Checklist."
},
"diagnosis_name": [
{
"value": "Autism",
"citations": [150],
"explanation": "Mother reported recent autism diagnosis."
},
{
"value": "Mixed Expressive Receptive Language Disorder",
"citations": [96, 130],
"explanation": "Diagnosed by psychologists."
}
],
"diagnosing_professional": [
{
"value": "Autism resource center psychologist",
"citations": [150],
"explanation": "Diagnosis reported from autism resource center."
}
]
},
"intervention_record": {
"interventions": [
{
"value": "speech_therapy",
"citations": [76, 86, 149, 154],
"explanation": "Recommended and initiated."
},
{
"value": "occupational_therapy",
"citations": [143, 154],
"explanation": "Recommended and initiated."
},
{
"value": "aba",
"citations": [154],
"explanation": "Intensive early intervention using applied behavioral analysis recommended."
}
],
"is_intervention_ongoing": {
"value": true,
"citations": [154, 160],
"explanation": "Interventions recommended as ongoing; autism persisted as of 2002."
},
"has_recovery": {
"value": false,
"citations": [11, 160, 162],
"explanation": "Report states 'Recovered? No'; autism persisted as of July 2002."
}
},
"birth_record": {
"was_normal_pre_vaccination": {
"value": true,
"citations": [33, 40, 54, 58, 63, 65, 146],
"explanation": "Neurobehavioral assessments appropriate for age; mother reported normal development until 21-23 months; neonatologist noted good development except mild language delay possibly due to prematurity."
},
"apgar_score": [
{
"value": "8 and 9 at 1 and 5 minutes",
"citations": [29],
"explanation": "Reported Aspar (APGAR) scores."
}
]
},
"behavior_record": {
"repetitive_behaviors": [
{
"value": "lining up toys and objects (e.g., blocks, chairs)",
"citations": [126, 148],
"explanation": "New behavior reported shortly after Oct 2000 evaluation."
}
]
},
"heavy_metal_tests": [
{
"metal_type": "mercury",
"value": 10.0,
"unit": "ug/L",
"is_elevated": false,
"citations": [20]
},
{
"metal_type": "lead",
"value": 16.0,
"unit": "ug/L",
"is_elevated": false,
"citations": [20]
},
{
"metal_type": "arsenic",
"value": 60.0,
"unit": "ug/L",
"is_elevated": false,
"citations": [20]
}
],
"comorbidities": [
{
"value": "allergies",
"citations": [17],
"explanation": "Allergies listed under medical history."
},
{
"value": "other",
"citations": [32, 39, 40],
"explanation": "Includes gastroesophageal reflux, otitis media, prematurity-related conditions."
}
],
"environmental_exposures": [
{
"value": "other_mercury",
"citations": [45, 46],
"explanation": "Mother alleged injury due to thimerosal and mercury in vaccines."
}
],
"legal_matter": {
"value": true,
"citations": [22],
"explanation": "Report received as part of litigation proceedings."
},
"diagnosis_reporting_delay_reason": null
}
```Metrics
{
"elapsed": 95.87803983688354,
"usage": {
"prompt_tokens": 13919,
"completion_tokens": 3249,
"total_tokens": 17168
}
}