BREAKING
GPT-5.6 Sol in Preview
Two frontier models, two stages
GPT-5.6
Preview
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Sol, Terra, Luna lineup
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Agentic tasks and safety
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Phased rollout
Grok 4.5
Internal beta
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Built on ~1.5T V9 model
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Tested at SpaceX, Tesla
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No public details yet
Terminal-Bench 2.1 scores
Sol Ultra
91.9
Sol
88.8
Mythos 5
88
GPT-5.5
83.4
0
$
Input / M tokens
0
$
Output / M tokens
0
M
Context length
How to access GPT-5.6
1
API or Codex preview
↓
2
General availability soon
↓
3
Cerebras 750 tok/sec in July
Same-day launch unconfirmed
AI NEWS BLITZ
OpenAI opens a GPT-5.6 preview while xAI's Grok 4.5 stays in internal beta.