GPT-6 Sol vs Solar Pro 4
GPT-6 Sol leads the LLM Stats Score 49.4 to 35.1. Solar Pro 4 is 7.6x cheaper per token.
OpenAI · Upstage · Updated for 2026
Which is better?
GPT-6 Sol leads the overall LLM Stats Score 49.4 to 35.1, ranking #21 overall.
On price, Solar Pro 4 is roughly 7.6x 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
- overall performance matters — it scores 49.4 and ranks #21 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- 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 Solar Pro 4
- cost matters — it's about 7.6x 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 · 9 for Solar Pro 4
GPT-6 Sol and Solar Pro 4don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
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) is 6.7x more expensive than Solar Pro 4 ($0.30/1M tokens).
For output processing, GPT-6 Sol ($10.00/1M tokens) is 8.3x more expensive than Solar Pro 4 ($1.20/1M tokens).
In conclusion, GPT-6 Sol is more expensive than Solar Pro 4.*
* 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 Solar Pro 4's 524,288 tokens. Solar Pro 4 can generate longer responses up to 131,072 tokens, while GPT-6 Sol is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
GPT-6 Sol supports multimodal inputs, whereas Solar Pro 4 does not.
GPT-6 Sol can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-6 Sol
Solar Pro 4
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 Solar Pro 4 was released on 2026-08-06.
GPT-6 Sol is 2 months newer than Solar Pro 4.
Sep 22, 2026
0 days ago
1mo newerAug 6, 2026
1 months ago
Knowledge Cutoff
When training data ends
GPT-6 Sol has a documented knowledge cutoff of 2026-04-20, while Solar Pro 4's cutoff date is not specified.
We can confirm GPT-6 Sol's training data extends to 2026-04-20, but cannot make a direct comparison without Solar Pro 4's cutoff date.
Apr 2026
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Provider Availability
GPT-6 Sol is available from OpenAI. Solar Pro 4 is available from Upstage.
GPT-6 Sol
Solar Pro 4
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6 Sol and Solar Pro 4 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6 Sol vs Solar Pro 4.