GPT-4 was released by OpenAI on March 14, 2023, as a flagship model in the GPT line.
GPT-4 passed a simulated bar exam with a score around the top 10% of test takers, where GPT-3.5 scored around the bottom 10%, and launched in ChatGPT Plus with API access by waitlist.
Compared with GPT-3.5 · the model it replaces
Scores around the top 10% of test takers on a simulated bar exam
Uniform Bar Exam, simulated — a US lawyer licensing exam; OpenAI's estimated percentile among human test takers
about 90th percentile
▲ score 298 / 400 · up from 213 / 400, about 10th percentile, for GPT-3.5
Costs developers 15 to 30 times as much as GPT-3.5 Turbo
Price per 1M tokens — what developers pay, input / output; GPT-4 with 8K context
$30 / $60
vs $2 / $2 for GPT-3.5 Turbo, the GPT-3.5 model used in ChatGPT · input 15x, output 30x
Every Monday, only when something shipped: the AI models that came out, what each one changed, and which lines are due next.
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GPT-6.1 Sol is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
Latest: GPT-6.1 Sol · Sep 29, 2026
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