LongCat-2.0 vs o3
API pricing, benchmark indices and specs — updated 19 October 2026.
meituan-longcat · A · Open weights
Params
1,775.6 B
Context
262,144
30d
3 K
mit · commercial OK
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | LongCat-2.0 | o3 |
|---|---|---|
| Deployment | Open weights · also via API | API-only (closed weights) |
| Parameters | 1,775.6 B | n/a — API-only |
| Architecture | LongcatCausalLM | n/a — API-only |
| Context length | 262,144 | 200,000 |
| Licence | mit | Proprietary |
| Commercial use | Allowed | Per API terms |
| Languages | — | n/a — API-only |
| Downloads 30d | 2,563 | n/a — API-only |
| Downloads all time | 9 K | n/a — API-only |
| Quantizations on the Hub | SAFETENSORS | n/a — API-only |
| Gated | No | n/a — API-only |
| First seen on the Hub | 2026-07-05 | n/a — API-only |
| API input price / 1M tokens | $0.30 | $2.00 |
| API output price / 1M tokens | $1.20 | $8.00 |
| Est. cost per 1M input + 1M output tokens | $1.50 | $10.00 |
| Cached input / 1M tokens | $0.006 | $0.50 |
| AA Intelligence Index | 19.1 | 20.2 |
| AA Coding Index | 45.3 | — |
| AA Agentic Index | 14 | — |
| Max output tokens | 262,144 | 100,000 |
| API providers | 1 | 1 |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
LongCat-2.0
$1.50
o3
$10.00
LongCat-2.0 is 6.7× cheaper at list price.
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
LongCat-2.0 · fp16 @ 256K ctx
12,430.1 GB / 24 GB