GPT-6 Sol vs Grok 4.6
Side-by-side pricing per provider, context window, benchmark scores and speed, all on one OpenAI-compatible API.
Creator
OpenAI
xAI
Released
Sep 22, 2026
Aug 12, 2026
Context window
400K
500K (best)
Max output
128K
500K (best)
Input / 1MLowest provider price
$2.00
$2.00
Output / 1MLowest provider price
$10.00
$6.00 (best)
Providers
1
1
IntelligenceArtificial Analysis index
47.6 (best)
44.3
CodingArtificial Analysis index
—
76.8
Accepts
Files, Image, Text
Text, Image
Produces
Text
Text
Tool calling
Yes
Yes
Structured output
Yes
Yes
Reasoning
Yes
No
GPT-6 Sol vs Grok 4.6: summary
GPT-6 Sol and Grok 4.6 are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.
GPT-6 Sol, from OpenAI, has a 400,000-token context window, costs $2.00/1M input and $10.00/1M output tokens and scores 47.6 on the Artificial Analysis Intelligence Index.
Grok 4.6, from xAI, has a 500,000-token context window, costs $2.00/1M input and $6.00/1M output tokens and scores 44.3 on the Artificial Analysis Intelligence Index.
Grok 4.6 has the largest context window and GPT-6 Sol scores highest for intelligence.
Switch with one line
client = OpenAI(base_url="https://api.fastrouter.ai/api/v1", api_key="<FASTROUTER_API_KEY>")
client.chat.completions.create(model="openai/gpt-6-sol", messages=[...])
# or
client.chat.completions.create(model="x-ai/grok-4.6", messages=[...])
Frequently asked questions
More comparisons
Benchmark scores sourced from ArtificialAnalysis