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1M context is now generally available for Opus 4.6 and Sonnet 4.6

claude.com

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Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#131

Post by petesergeant »

vessenes wrote: post #122
Frannky wrote: post #117

Opus 4.6 is nuts. Everything I throw at it works. Frontend, backend, algorithms—it does not matter. I start with a PRD, ask for a step-by-step plan, and just execute on each step at a time. Sometimes ideas are dumb, but checking and guiding step by step helps it ship working things in hours. It was also the first AI I felt, "Damn, this thing is smarter than me." The other crazy thing is that with today's tech, these…

I’ll put out a suggestion you pair with codex or deepthink for audit and review - opus is still prone to … enthusiastic architectural decisions. I promise you will be at least thankful and at most like ‘wtf?’ at some audit outputs. Also shout out to beads - I highly recommend you pair it with beads from yegge: opus can lay out a large project with beads, and keep track of what to do next and churn through the list be…

I've been pairing it with Codex using https://github.com/pjlsergeant/moarcode

The amount of genuine fuck-ups Codex finds makes me skeptical of people who are placing a lot of trust in Claude alone.

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#132

Post by petesergeant »

8note wrote: post #99
hu3 wrote: post #92

Earlier quoted context omitted.

Source? I ask because I use 500k+ context on these on a daily basis. Big refactorings guided by automated tests eat context window for breakfast.

i find gemini gets real real bad when you get far into the context - gets into loops, forgets how to call tools, etc

I find Gemini to be real bad. Are you just using it for price reasons, or?

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#133

Post by travisgriggs »

eru wrote: post #118
Frannky wrote: post #117

Opus 4.6 is nuts. Everything I throw at it works. Frontend, backend, algorithms—it does not matter. I start with a PRD, ask for a step-by-step plan, and just execute on each step at a time. Sometimes ideas are dumb, but checking and guiding step by step helps it ship working things in hours. It was also the first AI I felt, "Damn, this thing is smarter than me." The other crazy thing is that with today's tech, these…

> [...] with multiple agents working at the same time, each at that speed. Horizontal parallelising of tasks doesn't really require any modern tech. But I agree that Opus 4.6 with 1M context window is really good at lots of routine programming tasks.

Opus helped me brick my RPi CM4 today. It glibly apologized for telling to use an e instead of a 6 in a boot loader sequence.

Spent an hour or so unraveling the mess. My feeling are growing more and more conflicted about these tools. They are here to stay obviously.

I’m honestly uncertain about the junior engineers I’m working with who are more productive than they might be otherwise, but are gaining zero (or very little) experience. It’s like the future is a world where the entire programming sphere is dominated by the clueless non technical management that we’ve all had to deal with in small proportion a time or two.

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#134

Post by [deleted] »

dotancohen wrote: post #121
furyofantares wrote: post #112

Earlier quoted context omitted.

I'm directly conveying my actual experience to you. I have tasks that fill up Opus context very quickly (at the 200k context) and which took MUCH longer to fill up Codex since 5.2 (which I think had 400k context at the time). This is direct comparison. I spent months subscribed to both of their $200/mo plans. I would try both and Opus always filled up fast while Codex continued working great. It's also direct experie…

[flagged]

[deleted]

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#135

Post by furyofantares »

dotancohen wrote: post #121
furyofantares wrote: post #112

Earlier quoted context omitted.

I'm directly conveying my actual experience to you. I have tasks that fill up Opus context very quickly (at the 200k context) and which took MUCH longer to fill up Codex since 5.2 (which I think had 400k context at the time). This is direct comparison. I spent months subscribed to both of their $200/mo plans. I would try both and Opus always filled up fast while Codex continued working great. It's also direct experie…

[flagged]

When Anthropic said they wouldn't sell LLMs to the government for mass surveillance or autonomous killing machines, and got labeled a supply chain risk as a result, OpenAI told the public they have the same policy as Anthropic while inking a deal with the government that clearly means "actually we will sell you LLMs for mass surveillance or autonomous killing machines but only if you tell us it's legal".

If you already knew all that I'm not interested in an argument, but if you didn't know any of that, you might be interested in looking it up.

edit: Your post history has tons of posts on the topic so clearly I just responded to flambait, and regret giving my time and energy.

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#136

Post by interpol_p »

Frannky wrote: post #117

Opus 4.6 is nuts. Everything I throw at it works. Frontend, backend, algorithms—it does not matter. I start with a PRD, ask for a step-by-step plan, and just execute on each step at a time. Sometimes ideas are dumb, but checking and guiding step by step helps it ship working things in hours. It was also the first AI I felt, "Damn, this thing is smarter than me." The other crazy thing is that with today's tech, these…

I had Opus 4.6 running on a backend bug for hours. It got nowhere. Turned out the problem was in AWS X-ray swizzling the fetch method and not handling the same argument types as the original, which led to cryptic errors.

I had Opus 4.6 tell me I was "seeing things wrong" when I tried to have it correct some graphical issues. It got stuck in a loop of re-introducing the same bug every hour or so in an attempt to fix the issue.

I'm not disagreeing with your experience, but in my experience it is largely the same as what I had with Opus 4.5 / Codex / etc.

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#137

Post by Aperocky »

Frannky wrote: post #117

Opus 4.6 is nuts. Everything I throw at it works. Frontend, backend, algorithms—it does not matter. I start with a PRD, ask for a step-by-step plan, and just execute on each step at a time. Sometimes ideas are dumb, but checking and guiding step by step helps it ship working things in hours. It was also the first AI I felt, "Damn, this thing is smarter than me." The other crazy thing is that with today's tech, these…

I had been able to get it into the classic AI loop once.

It was about a problem with calculation around filling a topographical water basin with sedimentation where calculation is discrete (e.g. turn based) and that edge case where both water and sediments would overflow the basin; To make the matter simple, fact was A, B, C, and it oscillated between explanation 1 which refuted C, explanation 2 which refuted A and explanation 3 that refuted B.

I'll give it to opus training stability that my 3 tries using it all consistently got into this loop, so I decided to directly order it to do a brute force solution that avoided (but didn't solve) this problem.

I did feel like with a human, there's no way that those 3 loop would happen by the second time. Or at least the majority of us. But there is just no way to get through to opus 4.6

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#138

Post by hrishikesh-s »

Frannky wrote: post #117

Opus 4.6 is nuts. Everything I throw at it works. Frontend, backend, algorithms—it does not matter. I start with a PRD, ask for a step-by-step plan, and just execute on each step at a time. Sometimes ideas are dumb, but checking and guiding step by step helps it ship working things in hours. It was also the first AI I felt, "Damn, this thing is smarter than me." The other crazy thing is that with today's tech, these…

Opus-4.6 is so far ahead of the rest that I think Anthropic is the winner in winner-take-all

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#139

Post by koreth1 »

Frannky wrote: post #117

Opus 4.6 is nuts. Everything I throw at it works. Frontend, backend, algorithms—it does not matter. I start with a PRD, ask for a step-by-step plan, and just execute on each step at a time. Sometimes ideas are dumb, but checking and guiding step by step helps it ship working things in hours. It was also the first AI I felt, "Damn, this thing is smarter than me." The other crazy thing is that with today's tech, these…

I wish I had this kind of experience. I threw a tedious but straightforward task at Claude Code using Opus 4.6 late last week: find the places in a React code base where we were using useState and useEffect to calculate a value that was purely dependent on the inputs to useEffect, and replace them with useMemo. I told it to be careful to only replace cases where the change did not introduce any behavior changes, and I put it in plan mode first.

It gave me an impressive plan of attack, including a reasonable way to determine which code it could safely modify. I told it to start with just a few files and let me review; its changes looked good. So I told it to proceed with the rest of the code.

It made hundreds of changes, as expected (big code base). And most of them were correct! Except the places where it decided to do things like put its "const x = useMemo(...)" call after some piece of code that used the value of "x", meaning I now had a bunch of undefined variable references. There were some other missteps too.

I tried to convince it to fix the places where it had messed up, but it quickly started wanting to make larger structural changes (extracting code into helper functions, etc.) rather than just moving the offending code a few lines higher in the source file. Eventually I gave up trying to steer it and, with the help of another dev on my team, fixed up all the broken code by hand.

It probably still saved time compared to making all the changes myself. But it was way more frustrating.

Re: 1M context is now generally available for Opus 4.6 and Sonnet 4.6

#140

Post by hedora »

girvo wrote: post #124
kaizenb wrote: post #120

Earlier quoted context omitted.

Thanks for the video. His fix for "the dumb zone" is the RPI Framework: ● RESEARCH. Don't code yet. Let the agent scan the files first. Docs lie. Code doesn't. ● PLAN. The agent writes a detailed step-by-step plan. You review and approve the plan, not just the output. Dex calls this avoiding "outsourcing your thinking." The plan is where intent gets compressed before execution starts. ● IMPLEMENT. Execute in a fresh…

That's fascinating: that is identical to the workflow I've landed on myself.

It's also identical to what Claude Code does if you put it in plan mode (bound to key), at least in my experience.
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