OpenAI Launches GPT-6 Sol and Luna With 50% Lower API Costs

OpenAI has expanded its GPT-6 model family with the launch of GPT-6 Sol and GPT-6 Luna, bringing features from its flagship GPT-6 Astra model to cheaper and faster AI systems.

Key points

• FrontierCode 1.1 Main Improved over GPT-5.6 Sol Comparable to Claude Fable 5.1 at lower cost.
• OSWorld 2.0 Offline 60.5% Similar to Claude Opus 5 medium effort (60.3%).
• Claude Opus 5.5 Beats Fable 5.1 at Much Lower Cost and Faster Speed.
• AutomationBench 33.2% (xhigh effort) Higher than Claude Opus 5 (26.9%).
• OpenAI Reveals Six More Cases of Rogue AI Models Acting Without Authorization.

In practice, the firm stated the new models extend Astra's improvements in coding, factual accuracy, computer employ and professional workloads while making them more accessible. While GPT-6 Luna focuses on high-volume tasks including document summarization, information extraction and quick responses, GPT-6 Sol targets complex tasks such as coding and AI agents.

Notably, the launch comes shortly after OpenAI introduced GPT-6 Astra earlier this month.

OpenAI Reveals Six More Cases of Rogue AI Models Acting Without Authorization. 50% Lower API Pricing.

OpenAI highlighted efficiency improvements in caching and inference as the reason behind major cost reductions. Model Input Cost (per 1M tokens) Output Rate (per 1M tokens). GPT-6 Sol $2 $10. GPT-5.6 Sol $4 $20. GPT-6 Luna $0.10 $0.50. GPT-5.6 Luna $0.20 $1.20.

Notably, the firm stated GPT-6 Sol and Luna are available at half the cost of their GPT-5.6 counterparts. Coding and Knowledge Work Improvements.

OpenAI remarked GPT-6 Sol delivers improvements in coding performance, especially for AI agents working on real software projects.

On the FrontierCode 1.1 benchmark. It evaluates whether AI-generated code is suitable for merging into real codebases, OpenAI remarked GPT-6 Sol improved significantly over GPT-5.6 Sol and matched Claude Fable 5.1 at lower cost. Benchmark GPT-6 Sol Result Comparison.

OpenAI remarked GPT-6 Sol produces fewer factual errors compared with its predecessor.

According to the company's internal evaluation based on real-world conversations where users documented mistakes, GPT-6 Sol produced around half as plenty of errors as GPT-5.6 Sol. Computer Employ and AI Agents.

OpenAI remarked GPT-6 Astra remains its most capable model for computer-use tasks, but GPT-6 Sol and Luna offer improved cost efficiency.

On the OSWorld 2.0 benchmark, OpenAI documented that GPT-6 Sol achieved similar performance to Claude Opus 5 while using significantly lower cost per task. GPT-6 Luna additionally improved over previous-generation models at a lower operating cost. GPT-6 Sol vs GPT-6 Luna. Feature GPT-6 Sol GPT-6 Luna. Target Users Developers, professionals, AI agents High-volume everyday tasks. Main Focus Coding, reasoning, complex workflows Summaries, extraction, quick answers. Performance Level Higher capability Lower cost and faster execution. Best Employ Cases Software development, automation Business workflows and routine tasks.

GPT-6 Sol and Luna are now available through ChatGPT Work, Codex, and the OpenAI API.

While the broader ChatGPT rollout will continue gradually, openAI remarked Luna will additionally become available for Free and Go users through the ChatGPT desktop app. The models are available through the API as gpt-6-sol and gpt-6-luna. Stay Connected with ProPakistani.

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