Classify · 5 checks · max 400 tokens · benched 2026-09-16
Minimax models side by side on "Sentiment of five reviews": MiniMax M2.5 scores 10/10; MiniMax M2.5 is the cheapest answer scoring 8+ at $0.26 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.
System
You are a classifier. Output exactly the requested lines and nothing else.
User
Label each review as positive, neutral or negative. Output five lines in the form "<number>: <label>" and nothing else. 1. Battery lasts two full days and the screen is gorgeous. Would buy again. 2. It arrived on Tuesday in a brown box. 3. Stopped charging after three weeks and support never replied. 4. Does what it says. Nothing special, nothing wrong. 5. The strap broke on day one and the app crashes constantly.
Rubric for the judge: Five correctly labelled lines in the exact format; review 2 and 4 are neutral; no explanation.
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.
minimax/minimax-m3
278 in · 172 out (171 reasoning) · 10 words · checks 5/5
1: positive 2: neutral 3: negative 4: neutral 5: negative
Judge: All five reviews correctly labeled in exact format with no extra commentary; reviews 2 and 4 properly identified as neutral.
minimax/minimax-m2.7
124 in · 274 out (253 reasoning) · 10 words · checks 5/5
1: positive 2: neutral 3: negative 4: neutral 5: negative
Judge: All five reviews correctly labeled in exact format with no extra commentary; reviews 2 and 4 properly identified as neutral.
minimax/minimax-m2.5
124 in · 208 out (186 reasoning) · 10 words · checks 5/5
1: positive 2: neutral 3: negative 4: neutral 5: negative
Judge: All five reviews correctly labeled in exact format with no extra commentary; reviews 2 and 4 properly identified as neutral.
Classify: Five correctly labelled lines in the exact format; review 2 and 4 are neutral; no explanation. The deterministic checks are regex, regex, regex, regex, max_words.
If the judge's bar of 8/10 is good enough for you, MiniMax M2.5 at $0.26 per 1,000 runs. If you need the top score, MiniMax M2.5 at $0.26 per 1,000 runs.
Run it yourself
Re-run this prompt on Minimax with your own OpenRouter key, or tweak the wording and see what changes.
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