GPT-5.6 Luna vs Seed 2.0 Pro: Specs & Benchmark Comparison
.svg?dpl=dpl_Ee1bFjstgA6E69BkH9eMGKm3Ri2A){kind=icon}
| Characteristic | GPT-5.6 Luna | Seed 2.0 Pro |
|---|---|---|
| Company | OpenAI | ByteDance |
| Release Date | July 9, 2026 | February 14, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.1M | 256K |
| Context (output) | 128K | 66K |
| Input Price / 1M | $0.20 | $0.50 |
| Output Price / 1M | $1.20 | $3.00 |
| Average Score | 0.5 | 0.9 |
| Benchmarks | ||
| GPQA | 0.9 | 0.9 |
Visual Benchmark Comparison
GPT-5.6 Luna
Seed 2.0 Pro
GPQA0.9 vs 0.9
0.9
0.9
Verdict
GPT-5.6 Luna leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.6 Luna — 0.5, Seed 2.0 Pro — 0.9.
API Cost
GPT-5.6 Luna is 2.5x cheaper: input $0.20/1M vs $0.50/1M tokens.
Context Window
GPT-5.6 Luna supports a larger context: 1M vs 256K tokens.
Recency
GPT-5.6 Luna is newer: released 7/9/2026 vs 2/14/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — GPT-5.6 Luna or Seed 2.0 Pro?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — GPT-5.6 Luna or Seed 2.0 Pro?
GPT-5.6 Luna is cheaper for input: $0.20 per 1M tokens vs $0.50.
Which has a larger context window — GPT-5.6 Luna or Seed 2.0 Pro?
GPT-5.6 Luna supports a larger context: 1,050,000 tokens vs 256,000.
The GPT-5.6 Luna and Seed 2.0 Pro comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-5.6 Luna or Seed 2.0 Pro page. See also the complete list of AI model comparisons.