Key Takeaways
GPT-5.3 Codex wins:
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Supports vision
- Has reasoning mode
Palmyra X5 wins:
- Cheaper input tokens
- Cheaper output tokens
- Larger context window
Price Advantage
Palmyra X5
Benchmark Advantage
GPT-5.3 Codex
Context Window
Palmyra X5
Speed
GPT-5.3 Codex
Pricing Comparison
Price Comparison
| Metric | GPT-5.3 Codex | Palmyra X5 | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $1.75 | $0.60 | Palmyra X5 |
| Output (per 1M tokens) | $14.00 | $6.00 | Palmyra X5 |
| Cache Read (per 1M) | $0.17 | N/A | GPT-5.3 Codex |
Using a 3:1 input/output ratio, Palmyra X5 is 59% cheaper overall.
GPT-5.3 Codex Providers
No provider data available
Palmyra X5 Providers
No provider data available
Benchmark Comparison
3
Benchmarks Compared
0
GPT-5.3 Codex Wins
0
Palmyra X5 Wins
Benchmark Scores
| Benchmark | GPT-5.3 Codex | Palmyra X5 | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 54.0 | - | - |
Coding Index Code generation & understanding | 53.1 | - | - |
GPQA Graduate-level science | 91.5 | - | - |
GPT-5.3 Codex significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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Other models
Context & Performance
Context Window
GPT-5.3 Codex
400,000
tokens
Palmyra X5
1,040,000
tokens
Palmyra X5 has a 62% larger context window.
Speed Performance
| Metric | GPT-5.3 Codex | Palmyra X5 | Winner |
|---|---|---|---|
| Tokens/second | 63.8 tok/s | N/A | |
| Time to First Token | 83.49s | N/A |
Capabilities
Feature Comparison
| Feature | GPT-5.3 Codex | Palmyra X5 |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | GPT-5.3 Codex | Palmyra X5 |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | OpenAI | Writer |
| Released | Feb 2026 | Jan 2026 |
GPT-5.3 Codex Modalities
Input
textimage
Output
text
Palmyra X5 Modalities
Input
text
Output
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