MiniMax M3 vs MiniMax M2.7 vs MiniMax M2.5 on event announcement to structured json
Minimax models side by side on "Event announcement to structured JSON": MiniMax M2.5 scores 10/10; MiniMax M2.5 is the cheapest answer scoring 8+ at $0.21 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.
The prompt every model received
System
You are a data extraction engine. Reply with JSON only, no prose, no code fences.
User
Return one JSON object with keys title (string), date (YYYY-MM-DD), start_time (24-hour HH:MM), location (string), attendees (integer). Use only facts stated in the announcement.
Announcement: Join us for the Autumn Data Meetup on Tuesday 3 November 2026. Doors open at 2 pm and talks start at 2:30 pm at The Loft, 14 Harbour Street. We have confirmed 48 attendees so far and can take up to 60.
Rubric for the judge: Correctly picks the talk start (14:30, not doors), ISO date, integer attendees 48, and a sensible title and location.
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.
MiniMax M3
minimax/minimax-m3
10/10
Latency
263ms
Cost
$0.00026
Per 1,000
$0.26
287 in · 147 out (88 reasoning) · 7 words · checks 5/5
✓json_valid
✓json_keys
✓contains
✓contains
✓regex
{"title":"Autumn Data Meetup","date":"2026-11-03","start_time":"14:30","location":"The Loft, 14 Harbour Street","attendees":48}
Judge: All fields correctly extracted: title matches announcement, date in ISO format (2026-11-03), start_time correctly uses talk start time (14:30) not door opening, location fully specified, and attendees set to confirmed count (48).
MiniMax M2.7
minimax/minimax-m2.7
10/10
Latency
853ms
Cost
$0.00043
Per 1,000
$0.43
134 in · 322 out (282 reasoning) · 7 words · checks 5/5
✓json_valid
✓json_keys
✓contains
✓contains
✓regex
{"title":"Autumn Data Meetup","date":"2026-11-03","start_time":"14:30","location":"The Loft, 14 Harbour Street","attendees":48}
Judge: All fields correctly extracted: title matches announcement, date in ISO format (2026-11-03), start_time correctly uses talk start time (14:30) not door opening, location fully specified, and attendees set to confirmed count (48).
MiniMax M2.5
minimax/minimax-m2.5
10/10
top judge scorecheapest scoring 8+
Latency
2.8s
Cost
$0.00021
Per 1,000
$0.21
136 in · 157 out (115 reasoning) · 7 words · checks 5/5
✓json_valid
✓json_keys
✓contains
✓contains
✓regex
{"title":"Autumn Data Meetup","date":"2026-11-03","start_time":"14:30","location":"The Loft, 14 Harbour Street","attendees":48}
Judge: All fields correctly extracted: title matches announcement, date in ISO format (2026-11-03), start_time correctly uses talk start time (14:30) not door opening, location fully specified, and attendees set to confirmed count (48).
Frequently asked
▸What does this prompt test?
Extract JSON: Correctly picks the talk start (14:30, not doors), ISO date, integer attendees 48, and a sensible title and location. The deterministic checks are json_valid, json_keys, contains, contains, regex.
▸Which model should I pick for this task?
If the judge's bar of 8/10 is good enough for you, MiniMax M2.5 at $0.21 per 1,000 runs. If you need the top score, MiniMax M2.5 at $0.21 per 1,000 runs.
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