Key Takeaways
GPT-5 wins:
- Cheaper input tokens
- Larger context window
- Higher intelligence benchmark
- Better at math
o3 wins:
- Cheaper output tokens
- Faster response time
- Better at coding
- Has reasoning mode
Price Advantage
GPT-5
Benchmark Advantage
GPT-5
Context Window
GPT-5
Speed
o3
Pricing Comparison
Price Comparison
| Metric | GPT-5 | o3 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $1.25 | $2.00 | GPT-5 |
| Output (per 1M tokens) | $10.00 | $8.00 | o3 |
| Cache Read (per 1M) | $125000.00 | $500000.00 | GPT-5 |
Using a 3:1 input/output ratio, GPT-5 is 2% cheaper overall.
GPT-5 Providers
OpenAI $1.25 (Cheapest)
Azure $1.25 (Cheapest)
o3 Providers
OpenAI $2.00 (Cheapest)
Vercel $2.00 (Cheapest)
Benchmark Comparison
8
Benchmarks Compared
7
GPT-5 Wins
1
o3 Wins
Benchmark Scores
| Benchmark | GPT-5 | o3 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 44.6 | 38.3 | |
Coding Index Code generation & understanding | 36.0 | 38.4 | |
Math Index Mathematical reasoning | 94.3 | 88.3 | |
MMLU Pro Academic knowledge | 87.1 | 85.3 | |
GPQA Graduate-level science | 85.4 | 82.7 | |
LiveCodeBench Competitive programming | 84.6 | 80.8 | |
Aider Real-world code editing | 88.0 | 81.3 | |
AIME Competition math | 95.7 | 90.3 |
GPT-5 shows stronger mathematical reasoning abilities.
Cost vs Quality
X-axis:
Y-axis:
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GPT-5
Other models
Context & Performance
Context Window
GPT-5
400,000
tokens
Max output: 128,000 tokens
o3
200,000
tokens
Max output: 100,000 tokens
GPT-5 has a 50% larger context window.
Speed Performance
| Metric | GPT-5 | o3 | Winner |
|---|---|---|---|
| Tokens/second | 83.1 tok/s | 109.7 tok/s | |
| Time to First Token | 109.19s | 20.34s |
o3 responds 32% faster on average.
Capabilities
Feature Comparison
| Feature | GPT-5 | o3 |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | GPT-5 | o3 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | OpenAI |
| Released | Aug 2025 | Apr 2025 |
GPT-5 Modalities
Input
textimagefile
Output
text
o3 Modalities
Input
imagetextfile
Output
text