Key Takeaways
LongCat Flash Chat wins:
- Cheaper input tokens
- Cheaper output tokens
GPT-5 Mini wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
- Supports vision
- Supports tool calls
Price Advantage
LongCat Flash Chat
Benchmark Advantage
GPT-5 Mini
Context Window
GPT-5 Mini
Speed
GPT-5 Mini
Pricing Comparison
Price Comparison
| Metric | LongCat Flash Chat | GPT-5 Mini | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.20 | $0.25 | LongCat Flash Chat |
| Output (per 1M tokens) | $0.80 | $2.00 | LongCat Flash Chat |
| Cache Read (per 1M) | $200000.00 | $25000.00 | GPT-5 Mini |
Using a 3:1 input/output ratio, LongCat Flash Chat is 49% cheaper overall.
LongCat Flash Chat Providers
AtlasCloud $0.20 (Cheapest)
GPT-5 Mini Providers
OpenAI $0.25 (Cheapest)
Azure $0.25 (Cheapest)
Benchmark Comparison
6
Benchmarks Compared
0
LongCat Flash Chat Wins
0
GPT-5 Mini Wins
Benchmark Scores
| Benchmark | LongCat Flash Chat | GPT-5 Mini | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | - | 41.0 | - |
Coding Index Code generation & understanding | - | 35.3 | - |
Math Index Mathematical reasoning | - | 90.7 | - |
MMLU Pro Academic knowledge | - | 83.7 | - |
GPQA Graduate-level science | - | 82.8 | - |
LiveCodeBench Competitive programming | - | 83.8 | - |
GPT-5 Mini significantly outperforms in coding benchmarks.
Cost vs Quality
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Other models
Context & Performance
Context Window
LongCat Flash Chat
131,072
tokens
Max output: 32,768 tokens
GPT-5 Mini
400,000
tokens
Max output: 128,000 tokens
GPT-5 Mini has a 67% larger context window.
Speed Performance
| Metric | LongCat Flash Chat | GPT-5 Mini | Winner |
|---|---|---|---|
| Tokens/second | N/A | 78.9 tok/s | |
| Time to First Token | N/A | 107.34s |
Capabilities
Feature Comparison
| Feature | LongCat Flash Chat | GPT-5 Mini |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | LongCat Flash Chat | GPT-5 Mini |
|---|---|---|
| License | Open Source | Proprietary |
| Author | Meituan | OpenAI |
| Released | Sep 2025 | Aug 2025 |
LongCat Flash Chat Modalities
Input
text
Output
text
GPT-5 Mini Modalities
Input
textimagefile
Output
text