1/11
@buildthatidea
openai just dropped gpt-5 and it's insane!
it’s smarter, cheaper and faster than previous sota coding models.
here's everything you need to know:
2/11
@buildthatidea
1/ gpt-5 is so much smarter than sonnet/ opus while being so much cheaper
it scores 74.9% on swe-bench, beating claude opus 4.1’s 74.5%.
3/11
@buildthatidea
2/ gpt-5 (with thinking) hallucinates less than openai's previous models:
- hallucinates 5x less than o3 on open-source prompts
- hallucinates less with reasoning on health bench
4/11
@buildthatidea
3/ gpt-5 pro scores less on humanity's last exam than grok 4 heavy
5/11
@buildthatidea
4/ gpt-5 gets a 95.2% score on the needle-in-haystack test
that’s a massive jump from gpt-4.1 at 57.2% and o3 at 55%.
it’s the best performance openai has ever published on long-context retrieval.
6/11
@buildthatidea
5/ gpt-5 achieves 100% on aime 2025
7/11
@buildthatidea
6/ gpt-5 is the best writing model openai has ever released
it handles rhythm, ambiguity, and form with depth and clarity
8/11
@buildthatidea
7/ gpt-5 can make web apps/ games in one shot
9/11
@buildthatidea
8/ gpt-5 has 4 new personalities
cynic, robot, listener and nerd
these are text-only, opt-in, and available in settings under customize chatgpt
10/11
@buildthatidea
9/ gpt-5 is a unified system that picks the right mode for the job
- fast mode handles everyday questions
- thinking mode kicks in for complex tasks
- a smart router chooses automatically based on your prompt
you can also type "think hard about this" to trigger deep reasoning
11/11
@buildthatidea
10/ want to launch your own ai agents with gpt-5?
sign up at
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