Surprisingly (or maybe not) it matches the performance of Astra on my benchmark[1], but is much cheaper. It is also head to head with Opus 5.5 on both the price and pass rate, but edges it out slightly.

1 - https://bench.killswitch-lang.org/

Price/intelligence comparison with Opus 5.5 on Artificial Analysis:

https://artificialanalysis.ai/?models=gpt-5-6-luna-low%2Ccla...

According to this, at Max it's better and cheaper than 5.5 Medium, but worse than 5.5 High. At Medium, it's better and cheaper than 5.5 Low.

Just got access in Codex, looking forward to trying it out. Opus 5.5 has blown me away with what it's capable of doing, hopefully 6.1 will actually be a worthwhile contender.

Excited to tryout Decisions API as well.

Hardly any comparisons to Opus 5.5, which means it's not great

The real announcement is the ultra fast mode ... Astra at 300t/s is insane!

Are most comments on HN now just astroturfed $LLM_COMPANY promotions?

It seems pretty clear that this is a much larger model than Sol 6, and you can see this in the much lower generation times. I think this is also the main explanation for the $200 plan being cut in terms of API usage.

This is because they have really aggressively priced a larger model to compete with Opus 5.5, so their margins are much worse. Consequently, the equivalent API spend on the subscription is much less.

Ok, but we need 6.1 Luna soon. 6 feels worse than 5.6 in our agentic use case.

> Not sure what kind of usage can justify $200/month of either openai or anthropic, i'm not even talking about $500

It's easy to hit those numbers in a day in an modern-enterprise context synthesizing from incoherent information in jira, slack, layers of codebases etc. Modern enterprise meaning a firm that has been serving a few strategic customers w/ "move fast and break things" since day 1