def get_top_capacities(capabilities):
    """
    Return the top capabilities based on their scores.

    Args:
        capabilities (list): A list of tuples containing capability information.

    Returns:
        tuple: The top capability and its score.
    """
    return max(capabilities, key=lambda x: x[1])

# Example usage
capabilities = [('evolved_verified_generate_test_1768680667', 4235.89001196408, 51, 8305.7),
                ('verified_default', 4235.0, 51, 8303.9),
                ('evolved_verified_fib_fast_1769055768', 4235.0, 51, 8303.9)]

top_capacity = get_top_capacities(capabilities)
print(top_capacity)