LongCat-Flash-Chat vs Step-3.5-Flash: Specs & Benchmark Comparison
| Characteristic | LongCat-Flash-Chat | Step-3.5-Flash |
|---|---|---|
| Company | Meituan | StepFun |
| Release Date | August 28, 2025 | February 1, 2026 |
| Parameters | 560B | 196B |
| Multimodal | No | Yes |
| Context (input) | — | 66K |
| Context (output) | — | 8K |
| Input Price / 1M | — | $0.10 |
| Output Price / 1M | — | $0.40 |
| Average Score | 0.9 | 0.8 |
Verdict
Step-3.5-Flash leads in 1 out of 2 comparison categories.
Overall Performance
Both models show comparable average scores: LongCat-Flash-Chat — 0.9, Step-3.5-Flash — 0.8.
Recency
Step-3.5-Flash is newer: released 2/1/2026 vs 8/28/2025.
More About These Models
Related Comparisons
The LongCat-Flash-Chat and Step-3.5-Flash comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the LongCat-Flash-Chat or Step-3.5-Flash page. See also the complete list of AI model comparisons.