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

Grok 4.6 vs Grok 4.5 vs Grok 4.20 vs Grok 4.3 on single message intent

xAI models side by side on "Single message intent": Grok 4.3 scores 10/10; Grok 4.3 is the cheapest answer scoring 8+ at $0.64 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.

Grok 4.6

x-ai/grok-4.6

10/10
Latency
486ms
Cost
$0.00127
Per 1,000
$1.27

295 in · 145 out (142 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.

Grok 4.5

x-ai/grok-4.5

10/10
Latency
549ms
Cost
$0.00092
Per 1,000
$0.92

295 in · 91 out (88 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.

Grok 4.20

x-ai/grok-4.20

10/10
Latency
160ms
Cost
$0.00064
Per 1,000
$0.64

271 in · 176 out (174 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.

Grok 4.3

x-ai/grok-4.3

10/10
top judge scorecheapest scoring 8+
Latency
451ms
Cost
$0.00064
Per 1,000
$0.64

277 in · 196 out (194 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.

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, Grok 4.3 at $0.64 per 1,000 runs. If you need the top score, Grok 4.3 at $0.64 per 1,000 runs.

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