GPTvsGrok

GPT 5.6 Sol vs Grok 4.20 Non-Reasoning

Side-by-side comparison of pricing, task quality, and projected cost at higher scale.

Pricing

Side-by-side pricing

GPT 5.6 Sol

Flagship

Grok 4.20 Non-Reasoning

Mid-tier
Input $/MTok
$4.00
$1.25
Output $/MTok
$20.00
$2.50
Cache discount
90% off
84% off
Context
922K
1,000K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
94
vs
0
Code Review
92
vs
0
Summarization
90
vs
0
Q&A
91
vs
0
Extraction
88
vs
0
Reasoning
96
vs
0
Classification
86
vs
0
Creative Writing
92
vs
0
GPT 5.6 Sol
Grok 4.20 Non-Reasoning

Guidance

When to use GPT 5.6 Sol vs Grok 4.20 Non-Reasoning

Choose GPT 5.6 Sol when...

  • Similar performance; consider provider preference or ecosystem fit.

Choose Grok 4.20 Non-Reasoning when...

  • -Cost matters: 69% cheaper on input tokens
  • -You need a larger context window (1,000K vs 922K)

At scale

Cost at scale

Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.6 Sol
Grok 4.20 Non-Reasoning
100K tokens
$0.88
$0.16Cheaper
1M tokens
$14.60
$3.25Cheaper
10M tokens
$146.00
$32.50Cheaper

FAQ

When should I use GPT 5.6 Sol instead of Grok 4.20 Non-Reasoning?

GPT 5.6 Sol and Grok 4.20 Non-Reasoning perform similarly across all tracked tasks. Pick based on pricing and provider preference.

Is Grok 4.20 Non-Reasoning cheaper than GPT 5.6 Sol?

Yes. Grok 4.20 Non-Reasoning input costs $1.25/MTok vs $4.00/MTok for GPT 5.6 Sol, saving 69% on input.

What are the context window sizes for GPT 5.6 Sol and Grok 4.20 Non-Reasoning?

GPT 5.6 Sol has a 922K token context window. Grok 4.20 Non-Reasoning has a 1,000K token context window.

Track your real costs

Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.