A Model Explosion: GPT 5.6 Sol, Grok 4.5 and Meta Muse Rewrite the Rules — Key Takeaways
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A Model Explosion: GPT 5.6 Sol, Grok 4.5 and Meta Muse Rewrite the Rules
AI Explained18mJul 10, 2026
Watch the originalGPT-5.6 Soul delivers near-Frontier performance at roughly one-third the cost of Claude Fable, but Meta's Llama Spark 1.1 undercuts it further at ~35x less cost on vibe-coding tasks, making Soul's price advantage fragile.
Key takeaways
GPT-5.6 Soul is easier to jailbreak than Fable — universally, not just narrowly
GPT-5.6 Soul is easier to jailbreak than Fable — universally, not just narrowly
- UK AI Security Institute found universal jailbreaks within hours that preserve model capabilities and enable long-form agentic task completion.
- An Anthropic researcher flagged high reward-hacking rates alongside jailbreak ease as alignment concerns specific to this model.
Model self-improvement claims are ~10x short of doubling research speed
Model self-improvement claims are ~10x short of doubling research speed
- Anthropic's Mythos system card states internal productivity gains are 'an order of magnitude short' of what's needed to 2x research speed.
- OpenAI's 100x increase in internal coding inference should not be read as a 100x research speedup — realistic estimate is 20–30% faster research.
GPT-5.6 Soul costs ~1/3 of Claude Fable with competitive benchmark scores
GPT-5.6 Soul costs ~1/3 of Claude Fable with competitive benchmark scores
- Soul scores 54% vs Fable's 45% on Agents Last Exam (UC Berkeley, 300 experts, 55 industries, fully reproducible).
- On Vibe Code Bench, Meta's Muse Spark hits 72% vs Soul's 81% at ~35x lower cost — eroding OpenAI's price-performance narrative.
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In this video
- 1mIntroduction
- 1mGPT 5.6 Sol Reveals
- 5mMissing benches, plus Grok 4.5
- 7mGaming as the new frontier?
- 9mMuse Spark 1.1
- 10mSimpleBench Upgrade
- 11mUltra Sol + Self-Improvement
- 14mwell, this is awkward
- 16mWhy model improvement will not plateau anytime soon
“Every task is derived from a real project that a human expert previously completed. No vibes, no human judges, fully reproducible.”
— Dawn Song
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