LibreChat/api/utils/tokens.spec.js

const { getModelMaxTokens, matchModelName, maxTokensMap } = require('./tokens');

describe('getModelMaxTokens', () => {
  test('should return correct tokens for exact match', () => {
    expect(getModelMaxTokens('gpt-4-32k-0613')).toBe(maxTokensMap['gpt-4-32k-0613']);
  });

  test('should return correct tokens for partial match', () => {
    expect(getModelMaxTokens('gpt-4-32k-unknown')).toBe(maxTokensMap['gpt-4-32k']);
  });

  test('should return correct tokens for partial match (OpenRouter)', () => {
    expect(getModelMaxTokens('openai/gpt-4-32k')).toBe(maxTokensMap['gpt-4-32k']);
  });

  test('should return undefined for no match', () => {
    expect(getModelMaxTokens('unknown-model')).toBeUndefined();
  });

  test('should return correct tokens for another exact match', () => {
    expect(getModelMaxTokens('gpt-3.5-turbo-16k-0613')).toBe(
      maxTokensMap['gpt-3.5-turbo-16k-0613'],
    );
  });

  test('should return correct tokens for another partial match', () => {
    expect(getModelMaxTokens('gpt-3.5-turbo-unknown')).toBe(maxTokensMap['gpt-3.5-turbo']);
  });

  test('should return undefined for undefined input', () => {
    expect(getModelMaxTokens(undefined)).toBeUndefined();
  });

  test('should return undefined for null input', () => {
    expect(getModelMaxTokens(null)).toBeUndefined();
  });

  test('should return undefined for number input', () => {
    expect(getModelMaxTokens(123)).toBeUndefined();
  });

  // 11/06 Update
  test('should return correct tokens for gpt-3.5-turbo-1106 exact match', () => {
    expect(getModelMaxTokens('gpt-3.5-turbo-1106')).toBe(maxTokensMap['gpt-3.5-turbo-1106']);
  });

  test('should return correct tokens for gpt-4-1106 exact match', () => {
    expect(getModelMaxTokens('gpt-4-1106')).toBe(maxTokensMap['gpt-4-1106']);
  });

  test('should return correct tokens for gpt-3.5-turbo-1106 partial match', () => {
    expect(getModelMaxTokens('something-/gpt-3.5-turbo-1106')).toBe(
      maxTokensMap['gpt-3.5-turbo-1106'],
    );
    expect(getModelMaxTokens('gpt-3.5-turbo-1106/something-/')).toBe(
      maxTokensMap['gpt-3.5-turbo-1106'],
    );
  });

  test('should return correct tokens for gpt-4-1106 partial match', () => {
    expect(getModelMaxTokens('gpt-4-1106/something')).toBe(maxTokensMap['gpt-4-1106']);
    expect(getModelMaxTokens('gpt-4-1106-preview')).toBe(maxTokensMap['gpt-4-1106']);
    expect(getModelMaxTokens('gpt-4-1106-vision-preview')).toBe(maxTokensMap['gpt-4-1106']);
  });

  test('should return correct tokens for Anthropic models', () => {
    const models = [
      'claude-2.1',
      'claude-2',
      'claude-1.2',
      'claude-1',
      'claude-1-100k',
      'claude-instant-1',
      'claude-instant-1-100k',
    ];

    const claude21MaxTokens = maxTokensMap['claude-2.1'];
    const claudeMaxTokens = maxTokensMap['claude-'];
    models.forEach((model) => {
      const expectedTokens = model === 'claude-2.1' ? claude21MaxTokens : claudeMaxTokens;
      expect(getModelMaxTokens(model)).toEqual(expectedTokens);
    });
  });
});

describe('matchModelName', () => {
  it('should return the exact model name if it exists in maxTokensMap', () => {
    expect(matchModelName('gpt-4-32k-0613')).toBe('gpt-4-32k-0613');
  });

  it('should return the closest matching key for partial matches', () => {
    expect(matchModelName('gpt-4-32k-unknown')).toBe('gpt-4-32k');
  });

  it('should return the input model name if no match is found', () => {
    expect(matchModelName('unknown-model')).toBe('unknown-model');
  });

  it('should return undefined for non-string inputs', () => {
    expect(matchModelName(undefined)).toBeUndefined();
    expect(matchModelName(null)).toBeUndefined();
    expect(matchModelName(123)).toBeUndefined();
    expect(matchModelName({})).toBeUndefined();
  });

  // 11/06 Update
  it('should return the exact model name for gpt-3.5-turbo-1106 if it exists in maxTokensMap', () => {
    expect(matchModelName('gpt-3.5-turbo-1106')).toBe('gpt-3.5-turbo-1106');
  });

  it('should return the exact model name for gpt-4-1106 if it exists in maxTokensMap', () => {
    expect(matchModelName('gpt-4-1106')).toBe('gpt-4-1106');
  });

  it('should return the closest matching key for gpt-3.5-turbo-1106 partial matches', () => {
    expect(matchModelName('gpt-3.5-turbo-1106/something')).toBe('gpt-3.5-turbo-1106');
    expect(matchModelName('something/gpt-3.5-turbo-1106')).toBe('gpt-3.5-turbo-1106');
  });

  it('should return the closest matching key for gpt-4-1106 partial matches', () => {
    expect(matchModelName('something/gpt-4-1106')).toBe('gpt-4-1106');
    expect(matchModelName('gpt-4-1106-preview')).toBe('gpt-4-1106');
    expect(matchModelName('gpt-4-1106-vision-preview')).toBe('gpt-4-1106');
  });
});