Key Takeaways
Seed 2.0 Lite wins:
- Cheaper input tokens
- Cheaper output tokens
GPT-5.3 Codex wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Has reasoning mode
Price Advantage
Seed 2.0 Lite
Benchmark Advantage
GPT-5.3 Codex
Context Window
GPT-5.3 Codex
Speed
GPT-5.3 Codex
Pricing Comparison
Price Comparison
| Metric | Seed 2.0 Lite | GPT-5.3 Codex | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $0.25 | $1.75 | Seed 2.0 Lite |
| Output (per 1M tokens) | $2.00 | $14.00 | Seed 2.0 Lite |
| Cache Read (per 1M) | N/A | $0.17 | GPT-5.3 Codex |
Using a 3:1 input/output ratio, Seed 2.0 Lite is 86% cheaper overall.
Seed 2.0 Lite Providers
No provider data available
GPT-5.3 Codex Providers
No provider data available
Benchmark Comparison
3
Benchmarks Compared
0
Seed 2.0 Lite Wins
3
GPT-5.3 Codex Wins
Benchmark Scores
| Benchmark | Seed 2.0 Lite | GPT-5.3 Codex | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 36.3 | 54.0 | |
Coding Index Code generation & understanding | 21.4 | 53.1 | |
GPQA Graduate-level science | 65.6 | 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
Seed 2.0 Lite
262,144
tokens
GPT-5.3 Codex
400,000
tokens
GPT-5.3 Codex has a 34% larger context window.
Speed Performance
| Metric | Seed 2.0 Lite | GPT-5.3 Codex | Winner |
|---|---|---|---|
| Tokens/second | 0.0 tok/s | 74.0 tok/s | |
| Time to First Token | 0.00s | 85.27s |
GPT-5.3 Codex responds Infinity% faster on average.
Capabilities
Feature Comparison
| Feature | Seed 2.0 Lite | 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 | Seed 2.0 Lite | GPT-5.3 Codex |
|---|---|---|
| License | Proprietary | Proprietary |
| Author | Bytedance-seed | OpenAI |
| Released | Mar 2026 | Feb 2026 |
Seed 2.0 Lite Modalities
Input
textimagevideo
Output
text
GPT-5.3 Codex Modalities
Input
textimage
Output
text