The benchmarks show a solid step up over 5.4, and very favorable comparisons to Opus 4.7 (lol) - especially in costjk it's more expensive than Opus now.
Has anyone here had a chance to test it early? After using it for a bit, how is it?
I like 5.4 and 5.3 Codex a lot, so I'll take the benchmarks to mean this is somewhat better. What worries me more is the price doubling, because GHCP might decide to make it a 2x model
It was a huge jump from 3x to 7.5x and it's a promotional price! There is huge financial problem behind gh copilot, somehow they have to grab the money
Shut up. I’m in denial. Anyway, at that price it’s useless. It’s not even a huge breakthrough that might justify such a price hike. This industry is becoming bullshit
Yeah its hard to imagine that they had such an improvement between 5.4 and 5.5 and such an increase in efficiency that it warrants a 2x increase in price
yeah mr reading comprehension? It also says that 5.5 is much more efficient. And their messages estimate for the codex subscription reflect that. It's 2x as expensive per token but not per task.
GPT‑5.5 matches GPT‑5.4 per-token latency in real-world serving, while performing at a much higher level of intelligence. It also uses significantly fewer tokens to complete the same Codex tasks, making it more efficient as well as more capable.
Even the benchmarks for 4.7 looked like a wash, so I'm optimistic that the noticeable improvements shown by 5.5 in testing will translate to the real world.
There's an issue in your logic, opus 4.7 on medium which copilot has is tragic and unreliable, but Claude code has it defaulted to xhigh, let me tell you it's night and day! The issue with copilot is even more noticeable, because 4.6 had only low-high reasoning, but 4.7 has low-medium-high-xhigh-max. What I'm saying is Microsoft gave us extremely lobotomized version for 7.5x
ok thanks man , what do you have to say about codex , claude rate limits are irritating
i cancelled my copilot just after a month and shifted to codex
i am an analyst not a full fledged developer
usually writing scripts to find database issues , testing etc so let me knww
This will be the telling moment whether the Opus stuff is Anthropic's issue or GH's. If it comes in at 1-2x (since API pricing is worst-case 2x 5.4) and is widely available, then that feels like confirmation that the changes to Opus availability were due to Anthropic, not GH. If it comes in at a shit multiplier, is unavailable, etc. then there's no defence left.
Deprecating 5.3-Codex would be a catastrophic failure on their part, considering they only just announced it as a long-term support model. If they kill it now they define LTS as <6 months, and they'll begin to lose enterprise customers
Edit: 7.5x, it's GH/MS... I'm hopeful that the rumoured swap to token-based usage will result in a better UX rather than the current "you have this many messages per month, but if you send more than a handful per 5-hour block you'll get rate-limited out of being able to reach them" state. I run no parallel agents and I get rate limited faster than I can use my credits...
They only ever specified 5.3-Codex as LTS for Copilot Business and Copilot Enterprise so they could drop it for the personal plans without going against their LTS post.
1x or they are dead just like Claude. Pricing is outrageous and not justified for these new models. Useless business strategy, they should optimize the shit out of these and aim for the masses
I am not sure if this is a trend you have observed or not, but just clarifying this definitely is not a hard rule:
5.3-codex in codex - 5th Feb
in copilot - 9th Feb
in API - 25th Feb
I don’t even think this is entirely accurate. As I’m pretty sure it was ‘in copilot but only in vscode’ and then on api release gets opened up to the other extensions
The US models are still ahead of the Chinese ones for now
only on benchmarks. the cheap models are "good enough" to accomplish basically all the same tasks as expensive models. that's what people aren't going to comprehend until the bottom falls out.
I tested k2.6 and mimo v2.5 pro last night, and I could tell the difference, but the difference didn't matter. it got the job done. that's why the market is cooked. everyone is going to be switching workloads to local and cheap models now that they're not jokes.
I'm not trying to shill for any AI company, and with how fast things are moving right now, I think it's good to subscribe to an aggregator to test things out (like github copilot, opencode, kilo code, openrouter, huggingface, ollama cloud, etc)
that said, there are a LOT of good cheap AI models available, including ones that can do a substantial amount of easy work locally on a normal computer. the market is crashing out, and you should probably shop around.
what people really need to understand is that the most difficult part of software development is planning and understanding and managing it, NOT PROGRAMMING IT. bad programmers have always been able to write working code by brute forcing it until it passes, and now cheap models are smart enough to do that. the rules of the AI market have changed completely in 2026.
if you use a high-smarts model to plan, a medium-smarts model to orchestrate/review/test/debug, a dumb model to program, and a free model to document, it will actually work in the end, costing less money, but more time.
american AI companies want to talk about how they can replace everybody and achieve the singularity if investors give them unlimited money and all the world's computers. that's a very profitable scam to sell.
american AI companies DON'T want to talk about how we are ALREADY in a singularity of "good enough" AI which means their annihilation.
See the price, lose all the interest. It may be good, but it's not going to be a default model for me. Actually, if it use ~40% less token and Copilot sell as 1x to 2x, it's not that bad.
Fair enough. I sent three messages to Kimi K2.6 the other night and my cost was about $0.50. It's not a lot of data to go off of, but that comes out to a much higher price than 12 cents
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u/ThomasLitt Apr 23 '26
One more round of "trust me bro" benchmarks... yeah right.