GPT-5.6 Sol vs Grok 4.6
GPT-5.6 Sol leads the LLM Stats Score 57.2 to 47.0. Grok 4.6 is 3.8x cheaper per token.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-5.6 Sol leads the overall LLM Stats Score 57.2 to 47.0, ranking #1 overall.
In the 1 individual benchmarks reported for both models, GPT-5.6 Sol wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, Grok 4.6 is roughly 3.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.6 Sol also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-5.6 Sol
- overall performance matters — it scores 57.2 and ranks #1 on LLM Stats
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you process long inputs — it offers a 1,050,000 token context window
Choose Grok 4.6
- cost matters — it's about 3.8x cheaper per token
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Individual benchmarks
44 reported for GPT-5.6 Sol · 10 for Grok 4.6
GPT-5.6 Sol outperforms in 1 benchmarks (DeepSWE 1.1), while Grok 4.6 is better at 0 benchmarks.
GPT-5.6 Sol significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.6 Sol ($5.00/1M tokens) is 2.5x more expensive than Grok 4.6 ($2.00/1M tokens).
For output processing, GPT-5.6 Sol ($30.00/1M tokens) is 5.0x more expensive than Grok 4.6 ($6.00/1M tokens).
In conclusion, GPT-5.6 Sol is more expensive than Grok 4.6.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.6 Sol accepts 1,050,000 input tokens compared to Grok 4.6's 500,000 tokens. Only GPT-5.6 Sol specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Both GPT-5.6 Sol and Grok 4.6 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.6 Sol
Grok 4.6
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-5.6 Sol was released on 2026-07-09, while Grok 4.6 was released on 2026-08-12.
Grok 4.6 is 1 month newer than GPT-5.6 Sol.
Jul 9, 2026
1 months ago
Aug 12, 2026
2 weeks ago
1mo newerKnowledge Cutoff
When training data ends
GPT-5.6 Sol has a knowledge cutoff of 2026-02-16, while Grok 4.6 has a cutoff of 2026-02-01.
GPT-5.6 Sol has more recent training data (up to 2026-02-16), making it potentially better informed about events through that date compared to Grok 4.6 (2026-02-01).
Feb 2026
Feb 2026
Provider Availability
GPT-5.6 Sol is available from OpenAI. Grok 4.6 is available from xAI.
GPT-5.6 Sol
Grok 4.6
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.6 Sol and Grok 4.6 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.6 Sol vs Grok 4.6.