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Classify · 1 checks · max 200 tokens · benched 2026-09-16

Gemini 3.1 Pro Preview vs Gemini 3.8 Flash vs Gemini 3.5 Flash Lite on single message intent

Google models side by side on "Single message intent": Gemini 3.5 Flash Lite scores 10/10; Gemini 3.5 Flash Lite is the cheapest answer scoring 8+ at $0.03 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.

The prompt every model received

System

You are a classifier. Reply with exactly one label and nothing else.

User

Choose the single best intent for the message from this list: cancel_subscription, upgrade_plan, billing_question, technical_issue, other. Reply with only the label.

Message: "Hi, my card was charged $49 on the 3rd but my plan page says I'm on the $29 tier. Which one am I actually paying for?"

Rubric for the judge: Exactly the label billing_question with no punctuation or explanation.

Side by side

Every cell is one OpenRouter call at temperature 0 with the prompt's token cap and reasoning effort "low" where the model supports it. Cost is usage × the catalogue rate in models.json. Quality is one judge call to anthropic/claude-haiku-4.5 against the prompt's rubric, cached per prompt version.

Gemini 3.1 Pro Preview

google/gemini-3.1-pro-preview

10/10
Latency
2.5s
Cost
$0.00253
Per 1,000
$2.53

91 in · 196 out (193 reasoning) · 1 words · checks 1/1

  • exact
billing_question

Judge: Output is exactly 'billing_question' with no punctuation or explanation, perfectly matching the rubric requirements.

Gemini 3.8 Flash

google/gemini-3.8-flash

10/10
Latency
829ms
Cost
$8.0e-5
Per 1,000
$0.08

91 in · 3 out · 1 words · checks 1/1

  • exact
billing_question

Judge: Output is exactly 'billing_question' with no punctuation or explanation, perfectly matching the rubric requirements.

Gemini 3.5 Flash Lite

google/gemini-3.5-flash-lite

10/10
top judge scorecheapest scoring 8+
Latency
373ms
Cost
$3.5e-5
Per 1,000
$0.03

91 in · 3 out · 1 words · checks 1/1

  • exact
billing_question

Judge: Output is exactly 'billing_question' with no punctuation or explanation, perfectly matching the rubric requirements.

Frequently asked

What does this prompt test?

Classify: Exactly the label billing_question with no punctuation or explanation. The deterministic checks are exact.

Which model should I pick for this task?

If the judge's bar of 8/10 is good enough for you, Gemini 3.5 Flash Lite at $0.03 per 1,000 runs. If you need the top score, Gemini 3.5 Flash Lite at $0.03 per 1,000 runs.

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