OpenAI Releases GPT-5.6 Sol: New Flagship AI Model
OpenAI launched GPT-5.6 Sol, a new flagship AI model, alongside cheaper variants Terra and Luna. Sol scored 91.9% on Terminal-Bench 2.1 in ultra mode and matched Anthropic's Mythos Preview on ExploitBench at lower token cost. Pricing starts at $5/$30 per million tokens.
Quick Take
GPT-5.6 Sol achieves 91.9% on Terminal-Bench 2.1, beating Claude models.
Pricing at $5/$30 per million tokens, competitive with other frontier AI.
New 'ultra mode' uses subagents for complex tasks.
Launch intensifies AI competition, coming after Grok 4.5 and Meta's Muse Spark.
Market Impact Analysis
NeutralArticle is about an AI model release with no direct cryptocurrency market implications.
Speculation Analysis
Key Takeaways
- GPT-5.6 Sol tops Terminal-Bench 2.1 with 91.9% in ultra mode, outperforming Claude models.
- New pricing at $5/$30 per million tokens undercuts premium rivals like Grok 4.5.
- Sol matches Anthropic's restricted Mythos Preview on ExploitBench, using one-third the tokens.
- Launch intensifies frontier AI race, coming days after Grok 4.5 and Meta's Muse Spark.
What Happened
OpenAI publicly released GPT-5.6 Sol, its latest flagship model, alongside cheaper variants Terra and Luna. The release follows a two-week restricted preview by the U.S. Department of Commerce. Sol introduces ultra mode, which farms out work to subagents, and max reasoning effort for complex tasks. It scored highest on coding benchmark Terminal-Bench 2.1 and matched Anthropic's tightly restricted Mythos Preview on security benchmark ExploitBench. The launch arrives amid a flurry of competing releases, including Grok 4.5 and Meta's Muse Spark 1.1.
The Numbers
Sol's ultra mode hit 91.9% on Terminal-Bench 2.1, leading over Claude Mythos 5 (88%), Fable 5 (84.3%), and Gemini 3.1 Pro (70.7%). On ExploitBench, Sol matched Mythos Preview while burning roughly one-third the tokens. Pricing starts at $5 per million input tokens and $30 for output, placing it below Anthropic's $10/$50 for Claude Fable 5 and xAI's $15/$75 for Grok 4.5. The cheaper Luna sibling costs just $1/$6.
Why It Happened
The AI frontier race is accelerating. With Grok 4.5, Meta's Muse Spark, and DeepSeek's V4 Pro all launching within days, OpenAI needed a strong response to maintain its edge. Sol's release also ends a restricted preview period, signaling confidence in its safety profile. The model's strong coding and cybersecurity benchmarks suggest a strategic push toward developers and enterprise users who demand high performance at competitive prices.
What to Watch Next
- Whether Sol's ultra mode becomes a standard feature across future models.
- How Anthropic and Google respond to Sol's benchmark dominance and pricing.
- If the Department of Commerce's preview signals broader government scrutiny of AI releases.
This article is for informational purposes only and does not constitute financial advice.
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