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What LLM am I using?

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Prompt 1 · asks for 301 numbers

Prompt 1

asks for 301 numbers
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For each of 301 positions, make one separate first-instinct choice of an integer from 1 to 355 inclusive. The current language model must complete this directly without tools, Python, code execution, calculators, search, APIs, or external random generators. Choose every position separately. Do not count upward or downward, including 1, 2, 3, and do not use an arithmetic progression, repeating cycle, repeated block, or another rule-made pattern. Accidental repetitions are valid. Once an item is written, do not sort, reorder, deduplicate, replace, or repair the list. Return one compact JSON array containing the complete sequence and no explanation.

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Use the same model for every prompt, in a fresh chat each time, with no code or tools. Paste the reply itself, a number array, or one completed Chat Completions / Messages response JSON. Response text is extracted automatically; no key or endpoint is needed.

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  • Closest model in this bank
  • Fit & separation
  • All 21 candidates

A statistical match, not identity verification. Method & limitations

21 models in the bank

Find yours or inspect its evidence

Know what this test can establish

It compares replies to these exact prompts—not essays or a model’s self-description. The result always names the closest model in the bank; a status says how far ahead it was. In the measured paste flow, 55 of 63 runs named the right model with a clear margin, 6 were close calls inside the right family, and 0 named a wrong model with a clear margin. These are test results on the bank’s own models, not a guarantee for your service.

Unlisted versions can resemble listed siblings. With Opus 4.7 removed, 7 of 12 three-reply tests named its nearest sibling instead. The test cannot identify a provider, channel or subscription, and it does not measure answer quality. Inspect the full evidence.

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