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Mercury 2.5 vs GPT 6.1 Sol

At a glance

Inception's latest diffusion LLM and the fastest reasoning model available, producing and refining tokens in parallel instead of one at a time.

260K ctx$0.04/$0.15 per M

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
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper98%
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—
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%
Specs
260K
Context
66K
Max output
Sep 2026
Released
1.1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input98%$0.04/M tokens
Output99%$0.15/M tokens
Cache read96%$0.004/M tokens
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 Mercury 2.5Go to model
Chat with GPT 6.1 SolGo to model
Frequently Asked Questions: Mercury 2.5 vs GPT 6.1 Sol▼

Which is better, Mercury 2.5 or GPT 6.1 Sol?

▼

Both Mercury 2.5 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 is cheaper, Mercury 2.5 or GPT 6.1 Sol?

▼

Mercury 2.5 has a lower blended cost. Mercury 2.5: $0.04 input / $0.15 output. GPT 6.1 Sol: $2.00 input / $10.00 output.

Which has a larger context window, Mercury 2.5 or GPT 6.1 Sol?

▼

GPT 6.1 Sol has a larger context window: Mercury 2.5 supports 260K tokens vs GPT 6.1 Sol at 1.1M tokens.

Do both Mercury 2.5 and GPT 6.1 Sol support vision?

▼

GPT 6.1 Sol supports vision/image input, but Mercury 2.5 does not.

What are the key differences between Mercury 2.5 and GPT 6.1 Sol?

▼

Key differences: Mercury 2.5 is significantly cheaper; only GPT 6.1 Sol supports vision input. 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 Mercury 2.5 and GPT 6.1 Sol for free on idapt.app to see which performs better for your specific needs.

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