GPT-6 Sol vs Grok 4.5
GPT-6 Sol and Grok 4.5 are closely matched at 49.4 and 44.6 on the LLM Stats Score. Grok 4.5 is 1.3x cheaper per token.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-6 Sol and Grok 4.5 are closely matched on the overall LLM Stats Score at 49.4 and 44.6.
In the 2 individual benchmarks reported for both models, GPT-6 Sol wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Grok 4.5 is roughly 1.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-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-6 Sol
- your work emphasizes agents — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you process long inputs — it offers a 1,050,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Grok 4.5
- cost matters — it's about 1.3x cheaper per token
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
5 reported for GPT-6 Sol · 15 for Grok 4.5
GPT-6 Sol outperforms in 2 benchmarks (DeepSWE 1.1, FrontierCode 1.1), while Grok 4.5 is better at 0 benchmarks.
GPT-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-6 Sol ($2.00/1M tokens) costs the same as Grok 4.5 ($2.00/1M tokens).
For output processing, GPT-6 Sol ($10.00/1M tokens) is 1.7x more expensive than Grok 4.5 ($6.00/1M tokens).
In conclusion, GPT-6 Sol is more expensive than Grok 4.5.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-6 Sol accepts 1,050,000 input tokens compared to Grok 4.5's 500,000 tokens. Only GPT-6 Sol specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Both GPT-6 Sol and Grok 4.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-6 Sol
Grok 4.5
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-6 Sol was released on 2026-09-22, while Grok 4.5 was released on 2026-07-16.
GPT-6 Sol is 2 months newer than Grok 4.5.
Sep 22, 2026
0 days ago
2mo newerJul 16, 2026
2 months ago
Knowledge Cutoff
When training data ends
GPT-6 Sol has a knowledge cutoff of 2026-04-20, while Grok 4.5 has a cutoff of 2026-02-01.
GPT-6 Sol has more recent training data (up to 2026-04-20), making it potentially better informed about events through that date compared to Grok 4.5 (2026-02-01).
Apr 2026
2 mo newerFeb 2026
Provider Availability
GPT-6 Sol is available from OpenAI. Grok 4.5 is available from xAI.
GPT-6 Sol
Grok 4.5
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6 Sol and Grok 4.5 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6 Sol vs Grok 4.5.