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Grok Code Fast 1 vs GPT 6.1 Sol

At a glance

Speedy reasoning model built for agentic coding.

256K ctx

OpenAI's upgraded high-end GPT-6.1 tier, positioned below the flagship GPT 6 Astra.

1.1M ctx$2.00/$10.00 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI· as of 2026-10-02
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—
Agentic
Terminal Tasks25.8%
Reasoning
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-10-02
Reasoning & Knowledge
Graduate Science95.4%Factual Recall73.9%
Math
Competition Math100.0%
Agentic
Terminal Tasks—
Specs
256K
Context
33K
Max output
—
Released
1.1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$2.00/M tokens
Output$10.00/M tokens
Cache read$0.10/M tokens
Cache write$2.50/M tokens
Web search$0.01/search
Chat with Grok Code Fast 1Go to model
Chat with GPT 6.1 SolGo to model
Frequently Asked Questions: Grok Code Fast 1 vs GPT 6.1 Sol▼

Which is better, Grok Code Fast 1 or GPT 6.1 Sol?

▼

Both Grok Code Fast 1 and GPT 6.1 Sol are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which has a larger context window, Grok Code Fast 1 or GPT 6.1 Sol?

▼

GPT 6.1 Sol has a larger context window: Grok Code Fast 1 supports 256K tokens vs GPT 6.1 Sol at 1.1M tokens.

Do both Grok Code Fast 1 and GPT 6.1 Sol support vision?

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GPT 6.1 Sol supports vision/image input, but Grok Code Fast 1 does not.

What are the key differences between Grok Code Fast 1 and GPT 6.1 Sol?

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Key differences: only GPT 6.1 Sol supports vision input; only GPT 6.1 Sol offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Grok Code Fast 1 and GPT 6.1 Sol for free on idapt.app to see which performs better for your specific needs.

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