Key Takeaways
Nova Premier 1.0 wins:
- Cheaper output tokens
- Larger context window
- Faster response time
- Better at math
GPT-5.3 Codex wins:
- Cheaper input tokens
- Higher intelligence benchmark
- Better at coding
- Has reasoning mode
Price Advantage
Nova Premier 1.0
Benchmark Advantage
GPT-5.3 Codex
Context Window
Nova Premier 1.0
Speed
Nova Premier 1.0
Pricing Comparison
Price Comparison
| Metric | Nova Premier 1.0 | GPT-5.3 Codex | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $2.50 | $1.75 | GPT-5.3 Codex |
| Output (per 1M tokens) | $12.50 | $14.00 | Nova Premier 1.0 |
| Cache Read (per 1M) | $0.63 | $0.17 | GPT-5.3 Codex |
Using a 3:1 input/output ratio, GPT-5.3 Codex is 4% cheaper overall.
Nova Premier 1.0 Providers
No provider data available
GPT-5.3 Codex Providers
No provider data available
Benchmark Comparison
7
Benchmarks Compared
0
Nova Premier 1.0 Wins
3
GPT-5.3 Codex Wins
Benchmark Scores
| Benchmark | Nova Premier 1.0 | GPT-5.3 Codex | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 19.0 | 54.0 | |
Coding Index Code generation & understanding | 13.8 | 53.1 | |
Math Index Mathematical reasoning | 17.3 | - | - |
MMLU Pro Academic knowledge | 73.3 | - | - |
GPQA Graduate-level science | 56.9 | 91.5 | |
LiveCodeBench Competitive programming | 31.7 | - | - |
AIME Competition math | 17.0 | - | - |
GPT-5.3 Codex significantly outperforms in coding benchmarks.
Cost vs Quality
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Nova Premier 1.0
Other models
Context & Performance
Context Window
Nova Premier 1.0
1,000,000
tokens
GPT-5.3 Codex
400,000
tokens
Nova Premier 1.0 has a 60% larger context window.
Speed Performance
| Metric | Nova Premier 1.0 | GPT-5.3 Codex | Winner |
|---|---|---|---|
| Tokens/second | 72.2 tok/s | 68.4 tok/s | |
| Time to First Token | 0.84s | 87.36s |
Capabilities
Feature Comparison
| Feature | Nova Premier 1.0 | GPT-5.3 Codex |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | Nova Premier 1.0 | GPT-5.3 Codex |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Amazon | OpenAI |
| Released | Oct 2025 | Feb 2026 |
Nova Premier 1.0 Modalities
Input
textimage
Output
text
GPT-5.3 Codex Modalities
Input
textimage
Output
text