GPT-5.6 Terra vs Grok 4.5: Specs & Benchmark Comparison
| Characteristic | GPT-5.6 Terra | Grok 4.5 |
|---|---|---|
| Company | OpenAI | xAI |
| Release Date | July 9, 2026 | July 16, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.1M | 500K |
| Context (output) | 128K | — |
| Input Price / 1M | $2.00 | $2.00 |
| Output Price / 1M | $12.00 | $6.00 |
| Average Score | 0.6 | 0.8 |
| Benchmarks | ||
| Terminal-Bench 2.1 | 0.9 | 0.8 |
| SWE-Bench Pro | 0.6 | 0.7 |
| GPQA | 0.9 | 0.9 |
Visual Benchmark Comparison
GPT-5.6 Terra
Grok 4.5
Terminal-Bench 2.10.9 vs 0.8
0.9
0.8
SWE-Bench Pro0.6 vs 0.7
0.6
0.7
GPQA0.9 vs 0.9
0.9
0.9
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: GPT-5.6 Terra — 0.6, Grok 4.5 — 0.8.
API Cost
Grok 4.5 is 1.8x cheaper: input $2.00/1M vs $2.00/1M tokens.
Context Window
GPT-5.6 Terra supports a larger context: 1M vs 500K tokens.
Recency
Both models were released around the same time: 7/9/2026 and 7/16/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — GPT-5.6 Terra or Grok 4.5?
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 Terra or Grok 4.5?
GPT-5.6 Terra is cheaper for input: $2.00 per 1M tokens vs $2.00.
Which has a larger context window — GPT-5.6 Terra or Grok 4.5?
GPT-5.6 Terra supports a larger context: 1,050,000 tokens vs 500,000.
The GPT-5.6 Terra and Grok 4.5 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 Terra or Grok 4.5 page. See also the complete list of AI model comparisons.