Key Takeaways
GPT-5.4 wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Supports vision
- Supports tool calls
Apriel 1.5 15B Thinker wins:
- Cheaper input tokens
- Cheaper output tokens
- Has reasoning mode
Price Advantage
Apriel 1.5 15B Thinker
Benchmark Advantage
GPT-5.4
Context Window
GPT-5.4
Speed
GPT-5.4
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | GPT-5.4 | Apriel 1.5 15B Thinker |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | GPT-5.4 | Apriel 1.5 15B Thinker |
|---|---|---|
| License | Proprietary | Open Source |
| Author | OpenAI | Fireworks |
| Released | Mar 2026 | Unknown |
GPT-5.4 Modalities
Input
textimagefile
Output
text
Apriel 1.5 15B Thinker Modalities
Input
Output