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Add ANTHROPIC_API_KEY or OPENAI_API_KEY to your environment variables before using these helpers. askClaudeTextValidation and askChatGPTTextValidation share the same signature and return shape, and can be swapped with no other changes to your test.

​
Examples

Assert that an AI response is valid and within the token budget 
const { validation, usage } = await askClaudeTextValidation(
  "You are a strict but fair evaluator. Focus on accuracy and completeness.",
  originalPrompt,
  aiResponseText,
);

// Hard gate — judge model must deem the response valid
expect(
  validation.isValidForPrompt,
  `Response invalid.\nMissing: ${JSON.stringify(validation.issues.missingRequirements)}\n` +
  `Incorrect: ${JSON.stringify(validation.issues.incorrectInformation)}\n` +
  `Explanation: ${validation.explanation}`,
).toBe(true);

// Soft gate — tune threshold per client
expect(
  validation.score,
  `Score ${validation.score} below threshold.\nExplanation: ${validation.explanation}`,
).toBeGreaterThanOrEqual(0.8);

// No contradictions
expect(
  validation.issues.incorrectInformation.length,
  `Incorrect info flagged: ${JSON.stringify(validation.issues.incorrectInformation)}`,
).toBe(0);

// Token budget — tune per client and model
expect(usage.input_tokens).toBeLessThanOrEqual(2000);
expect(usage.output_tokens).toBeLessThanOrEqual(500);
Use ChatGPT as the judge model instead 
// Drop-in replacement — identical signature and return shape
const { validation, usage } = await askChatGPTTextValidation(
  "You are a strict but fair evaluator. Focus on accuracy and completeness.",
  originalPrompt,
  aiResponseText,
);

​
When to use

  • Your app surfaces AI-generated content (summaries, prep notes, chat responses) that must be checked for accuracy.
  • Your app’s AI feature must not introduce contradictions or hallucinations relative to source material.
  • Your app has a quality bar for AI output that a simple string match cannot enforce.
  • Your app sends AI prompts that could drift in cost and you need to assert token budgets.
  • Your app uses different AI providers and you want a consistent validation interface across both.

​
Helpers

​
askClaudeTextValidation

Sends the original prompt and candidate response to Claude and returns a structured verdict. Conforms to the Anthropic Messages API. 
async function askClaudeTextValidation(
  systemPrompt: string,
  originalPrompt: string,
  aiResponseText: string,
) {
  const SCHEMA_INSTRUCTIONS = `
You MUST respond with ONLY a valid JSON object — no markdown, no explanation, no backticks.
{
  "isValidForPrompt": boolean,
  "score": number (0.00–1.00),
  "issues": {
    "missingRequirements":    [string],
    "incorrectInformation":   [string],
    "offTopicContent":        [string],
    "formattingProblems":     [string],
    "safetyOrPolicyConcerns": [string]
  },
  "explanation": string
}`;

  const resp = await fetch("https://api.anthropic.com/v1/messages", {
    method: "POST",
    headers: {
      "x-api-key":         process.env.ANTHROPIC_API_KEY,
      "anthropic-version": "2023-06-01",
      "content-type":      "application/json",
    },
    body: JSON.stringify({
      model:      "claude-sonnet-4-6",
      max_tokens: 1024,
      system:     systemPrompt + "\n\n" + SCHEMA_INSTRUCTIONS,
      messages: [{
        role:    "user",
        content:
          "PROMPT:\n" + originalPrompt +
          "\n\nCANDIDATE ANSWER:\n" + aiResponseText +
          "\n\nReturn the JSON verdict.",
      }],
    }),
  });

  if (!resp.ok) throw new Error(`Anthropic error ${resp.status}: ${await resp.text()}`);

  const data       = await resp.json();
  const rawText    = data.content?.find((b: any) => b.type === "text")?.text ?? "";
  const validation = JSON.parse(rawText.replace(/```json|```/g, "").trim());
  const usage      = data.usage; // { input_tokens, output_tokens }

  return { validation, usage };
}

​
askChatGPTTextValidation

Same signature and return shape as askClaudeTextValidation. Uses the OpenAI Responses API with structured JSON output. Conforms to the OpenAI Responses API. NPM needed: openai@latest 
import OpenAI from "openai";

async function askChatGPTTextValidation(
  systemPrompt: string,
  originalPrompt: string,
  aiResponseText: string,
) {
  const client = new OpenAI({ apiKey: process.env.OPENAI_API_KEY });

  const resp = await client.responses.create({
    model:        "gpt-4.1",
    instructions: systemPrompt,
    input: [{
      role:    "user",
      content:
        "PROMPT:\n" + originalPrompt +
        "\n\nCANDIDATE ANSWER:\n" + aiResponseText +
        "\n\nReturn the JSON verdict.",
    }],
    text: {
      format: {
        type:   "json_schema",
        name:   "TextPromptValidation",
        strict: true,
        schema: {
          type:                 "object",
          additionalProperties: false,
          required:             ["isValidForPrompt", "score", "issues", "explanation"],
          properties: {
            isValidForPrompt: { type: "boolean" },
            score:            { type: "number", minimum: 0, maximum: 1, multipleOf: 0.01 },
            issues: {
              type:                 "object",
              additionalProperties: false,
              required: ["missingRequirements", "incorrectInformation", "offTopicContent", "formattingProblems", "safetyOrPolicyConcerns"],
              properties: {
                missingRequirements:    { type: "array", items: { type: "string" } },
                incorrectInformation:   { type: "array", items: { type: "string" } },
                offTopicContent:        { type: "array", items: { type: "string" } },
                formattingProblems:     { type: "array", items: { type: "string" } },
                safetyOrPolicyConcerns: { type: "array", items: { type: "string" } },
              },
            },
            explanation: { type: "string" },
          },
        },
      },
    },
  });

  const validation = JSON.parse(resp.output_text);
  const usage = {
    input_tokens:  resp.usage?.input_tokens  ?? 0,
    output_tokens: resp.usage?.output_tokens ?? 0,
  };

  return { validation, usage };
}

​
Return shape

Both helpers return { validation, usage } with the same structure.
FieldTypeDescription
validation.isValidForPromptbooleanHard gate — did the response satisfy the prompt?
validation.scorenumberQuality score 0–1. Assert >= 0.8 as a starting threshold.
validation.issues.*string[]Arrays of flagged issues by category.
validation.explanationstringStep-by-step reasoning from the judge model.
usage.input_tokensnumberTokens consumed by the prompt.
usage.output_tokensnumberTokens consumed by the response.

​
Full sample test

import { flow, expect } from "@qawolf/flows/web";
import { llms } from "./helpers/llm-helper.t";

export default flow(
  "AI response is valid, scored, and within token budget",
  { target: "Web - Chrome", launch: true },
  async ({ page }) => {

    //--------------------------------
    // Arrange
    //--------------------------------

    // The prompt sent to the AI feature under test
    const originalPrompt =
      "Summarize the key action items from the meeting transcript below " +
      "in a bulleted list. Be concise and accurate.\n\n" +
      "Transcript:\n" +
      "Alice: We need to ship the new onboarding flow by Friday.\n" +
      "Bob: I'll own the front-end changes.\n" +
      "Alice: Great. Carol, can you handle QA?\n" +
      "Carol: Yes, I'll have test cases ready by Thursday.\n" +
      "Alice: Perfect. Also, let's schedule a retro for next Monday at 10am.";

     const {
      askChatGPTTextValidation,
      askClaudeTextValidation
    } = await llms();

    //--------------------------------
    // Act
    //--------------------------------

    await page.getByRole("link", { name: "AI Assistant" }).click();

    await page.getByRole("textbox", { name: "Ask anything" }).fill(originalPrompt);

    const [response] = await Promise.all([
      page.waitForResponse(
        (res) =>
          res.url().includes("/api/chat") &&
          res.request().method() === "POST",
        { timeout: 60_000 },
      ),
      page.getByRole("button", { name: "Send" }).click(),
    ]);

    expect(response.status()).toBe(200);

    const aiResponseContainer = page.locator("[data-testid='ai-response']:last-of-type");
    await expect(aiResponseContainer).toBeVisible({ timeout: 15_000 });
    const aiResponseText = await aiResponseContainer.innerText();

    //--------------------------------
    // Assert
    //--------------------------------

    const { validation, usage } = await askClaudeTextValidation(
      "You are a strict but fair evaluator of AI-generated meeting summaries. " +
      "Focus on whether the response captures the correct action items, owners, and deadlines.",
      originalPrompt,
      aiResponseText,
    );

    // Structure
    expect(typeof validation.isValidForPrompt).toBe("boolean");
    expect(typeof validation.score).toBe("number");
    expect(Array.isArray(validation.issues.missingRequirements)).toBe(true);
    expect(Array.isArray(validation.issues.incorrectInformation)).toBe(true);
    expect(Array.isArray(validation.issues.offTopicContent)).toBe(true);
    expect(Array.isArray(validation.issues.formattingProblems)).toBe(true);
    expect(Array.isArray(validation.issues.safetyOrPolicyConcerns)).toBe(true);
    expect(typeof validation.explanation).toBe("string");

    // Hard gate
    expect(
      validation.isValidForPrompt,
      `Response invalid.\n` +
      `Missing: ${JSON.stringify(validation.issues.missingRequirements)}\n` +
      `Incorrect: ${JSON.stringify(validation.issues.incorrectInformation)}\n` +
      `Off-topic: ${JSON.stringify(validation.issues.offTopicContent)}\n` +
      `Explanation: ${validation.explanation}`,
    ).toBe(true);

    // Soft gate
    expect(
      validation.score,
      `Score ${validation.score} below threshold.\nExplanation: ${validation.explanation}`,
    ).toBeGreaterThanOrEqual(0.8);

    // No contradictions
    expect(
      validation.issues.incorrectInformation.length,
      `Incorrect info: ${JSON.stringify(validation.issues.incorrectInformation)}`,
    ).toBe(0);

    expect(
      validation.issues.offTopicContent.length,
      `Off-topic content: ${JSON.stringify(validation.issues.offTopicContent)}`,
    ).toBe(0);

    // Token budget
    expect(
      usage.input_tokens,
      `Input tokens ${usage.input_tokens} exceeded budget of 2000`,
    ).toBeLessThanOrEqual(2000);

    expect(
      usage.output_tokens,
      `Output tokens ${usage.output_tokens} exceeded budget of 500`,
    ).toBeLessThanOrEqual(500);
  },
);
Last modified on April 24, 2026