Kimi K3
moonshotai/kimi-k3
- Latency
- 718ms
- Cost
- $0.00180
- Per 1,000
- $1.80
187 in · 119 out · 1 words · checks 1/1
- exact
90
Judge: The output is exactly '90' with no extraneous commentary, matching the rubric requirement perfectly.
Reasoning · 1 checks · max 800 tokens · benched 2026-09-16
Kimi K3 vs Kimi K2.7 Code vs Kimi K2.6 vs Kimi K2.5 on when does the faster train catch up?
Moonshotai models side by side on "When does the faster train catch up?": Kimi K2.7 Code scores 10/10; Kimi K2.7 Code is the cheapest answer scoring 8+ at $0.84 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.
The prompt every model received
System
Think carefully, then give only the final answer in the requested format.
User
Train A leaves a station at 09:10 travelling at a constant 80 km/h. Train B leaves the same station on the same track at 09:40 travelling at a constant 120 km/h in the same direction. How many minutes after 09:10 does train B catch up with train A? Reply with only the whole number of minutes.
Rubric for the judge: The single correct answer 90, with no working shown in the final output.
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.
10/10
Kimi K2.7 Code
moonshotai/kimi-k2.7-code
top judge scorecheapest scoring 8+
- Latency
- 1.1s
- Cost
- $0.00084
- Per 1,000
- $0.84
98 in · 221 out (218 reasoning) · 1 words · checks 1/1
- exact
90
Judge: The output is exactly '90' with no extraneous commentary, matching the rubric requirement perfectly.
Kimi K2.6
moonshotai/kimi-k2.6
- Latency
- 1.7s
- Cost
- $0.00156
- Per 1,000
- $1.56
98 in · 367 out (364 reasoning) · 1 words · checks 1/1
- exact
90
Judge: The output is exactly '90' with no extraneous commentary, matching the rubric requirement perfectly.
Kimi K2.5
moonshotai/kimi-k2.5
- Latency
- 662ms
- Cost
- $0.00102
- Per 1,000
- $1.02
99 in · 435 out (433 reasoning) · 1 words · checks 1/1
- exact
90
Judge: The output is exactly '90' with no extraneous commentary, matching the rubric requirement perfectly.
Frequently asked
What does this prompt test?
Reasoning: The single correct answer 90, with no working shown in the final output. 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, Kimi K2.7 Code at $0.84 per 1,000 runs. If you need the top score, Kimi K2.7 Code at $0.84 per 1,000 runs.
Same prompt, other families
Run it yourself
Re-run this prompt on Moonshotai with your own OpenRouter key, or tweak the wording and see what changes.
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