Opus 5.5 and GPT-6 Sol/Luna shipped back to back, and 'frontier pacing' didn't feel very paced

Ananth @Ananth7eOriginally posted 2026.09.23

Open original on X

yesterday felt like one of those once-a-year AI days. anthropic dropped opus 5.5. openai followed with gpt-6 sol and luna. back to back frontier releases from the two labs leading the race. opus with major capability and sol with efficiency gains. and this is supposedly the era of "frontier pacing" lol. didn't feel very paced yesterday