GPT-6 Sol vs Seed 1.8
GPT-6 Sol leads the LLM Stats Score 49.4 to 34.1. Seed 1.8 is 5.8x cheaper per token.
OpenAI · ByteDance · Updated for 2026
Which is better?
GPT-6 Sol leads the overall LLM Stats Score 49.4 to 34.1, ranking #21 overall.
On price, Seed 1.8 is roughly 5.8x 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 Seed 1.8
- cost matters — it's about 5.8x 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 · 57 for Seed 1.8
GPT-6 Sol and Seed 1.8don'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 8.0x more expensive than Seed 1.8 ($0.25/1M tokens).
For output processing, GPT-6 Sol ($10.00/1M tokens) is 5.0x more expensive than Seed 1.8 ($2.00/1M tokens).
In conclusion, GPT-6 Sol is more expensive than Seed 1.8.*
* 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 Seed 1.8's 256,000 tokens. Seed 1.8 can generate longer responses up to 256,000 tokens, while GPT-6 Sol is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both GPT-6 Sol and Seed 1.8 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-6 Sol
Seed 1.8
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 Seed 1.8 was released on 2026-02-17.
GPT-6 Sol is 7 months newer than Seed 1.8.
Sep 22, 2026
0 days ago
7mo newerFeb 17, 2026
7 months ago
Knowledge Cutoff
When training data ends
GPT-6 Sol has a documented knowledge cutoff of 2026-04-20, while Seed 1.8'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 Seed 1.8's cutoff date.
Apr 2026
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Provider Availability
GPT-6 Sol is available from OpenAI. Seed 1.8 is available from DeepInfra.
GPT-6 Sol
Seed 1.8
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6 Sol and Seed 1.8 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6 Sol vs Seed 1.8.