GPT-5.6 Sol vs Grok 4.6: Specs & Benchmark Comparison
GPT-5.6 Sol is developed by OpenAI, while Grok 4.6 comes from xAI. GPT-5.6 Sol was released in July 2026, and Grok 4.6 followed a month later in August 2026.
We have 44 benchmark results for GPT-5.6 Sol and 4 benchmark results for Grok 4.6, but they overlap on a single test: DeepSWE 1.1, where GPT-5.6 Sol scores 73.0% against 66.0%.
Grok 4.6 is the cheaper API at $2 per million input tokens and $6 per million output tokens, roughly 3 times cheaper than GPT-5.6 Sol at $5 and $30. GPT-5.6 Sol takes the larger context window at 1M tokens, compared with 500K for Grok 4.6. Both accept text and images as input.
| Characteristic | GPT-5.6 Sol | Grok 4.6 |
|---|---|---|
| Company | OpenAI | xAI |
| Release Date | July 9, 2026 | August 12, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.1M | 500K |
| Context (output) | 128K | — |
| Input Price / 1M | $5.00 | $2.00 |
| Output Price / 1M | $30.00 | $6.00 |
| Average Score | 64.5% | 61.7% |
| Benchmarks | ||
| DeepSWE 1.1 | 73.0% | 66.0% |
Visual Benchmark Comparison
Verdict
Grok 4.6 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: GPT-5.6 Sol — 0.6, Grok 4.6 — 0.6.
Grok 4.6 is 4.4x cheaper: input $2.00/1M vs $5.00/1M tokens.
GPT-5.6 Sol supports a larger context: 1M vs 500K tokens.
Grok 4.6 is newer: released 8/12/2026 vs 7/9/2026.
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Frequently Asked Questions
Which is better for coding — GPT-5.6 Sol or Grok 4.6?
Which model is cheaper — GPT-5.6 Sol or Grok 4.6?
Which has a larger context window — GPT-5.6 Sol or Grok 4.6?
The GPT-5.6 Sol and Grok 4.6 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 Sol or Grok 4.6 page. See also the complete list of AI model comparisons.