GPT-6 Sol
Cost-efficient mid-tier model for complex professional work and coding
Context window
1.05M
Input / 1M tokens
$2.00
Output / 1M tokens
$10.00
Provider
OpenAI
Data verified 2026-09-24
GPT-6 Sol is OpenAI's balanced model in the GPT-6 series, trained with the same methods as GPT-6 Astra. It brings Astra-level capabilities in factuality, coding, and professional tasks at significantly lower cost through improved inference and caching. Designed for demanding work including agentic coding, business automation, and software engineering.
Capability index
Relative estimates (0-100) to place this model against its peers, grounded in published benchmarks.
How to access it
Available via OpenAI API. Also available in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise, and Edu users.
Strengths
- ✓50% price reduction vs. GPT-5.6 Sol while maintaining comparable capability
- ✓Halved factual error rate compared to predecessor
- ✓Strong on coding and computer use tasks
- ✓Astra-level factual reliability at much lower cost
Best for developers who...
When to choose it (and when not to)
Reach for GPT-6 Sol when...
- →Need Astra-level capabilities at mid-tier pricing
- →Running at scale with cost constraints
- →Balancing performance and affordability
Look elsewhere if...
- ✕Requiring absolute maximum performance (use Astra instead)
- ✕Ultra-cost-sensitive work (use Luna instead)
How to use it
Quickstart
Pythonfrom openai import OpenAI
client = OpenAI()
response = client.chat.completions.create(
model="gpt-6-sol",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Use service_tier='fast' for priority processing at 2x the standard rate
API model id: gpt-6-sol
Benchmarks
| Benchmark | Score | Notes |
|---|---|---|
| AutomationBench | 33.2% | At maximum reasoning level, outperforms Claude Opus 5 at max effort at 9% of cost per task |
| Internal Factuality Evaluation | ~50% error reduction | Based on de-identified real ChatGPT conversations; half the errors of GPT-5.6 Sol |
Source: OpenAI Official Announcement
Compare GPT-6 Sol
Compare GPT-6 Sol with any other model
Build a comparison →All model comparisons →