Brutkey

Simon Willison
@simon@fedi.simonwillison.net
Simon Willison
@simon@fedi.simonwillison.net

Here's what I mean by "competitively priced"

A table comparing AI model pricing. Columns: Model, Input $/m, Output $/m. Rows: Claude Opus 4 – Input 15.00, Output 75.00; Claude Sonnet 4 – Input 3.00, Output 15.00; Gemini 2.5 Pro (>200,000) – Input 2.50, Output 15.00; GPT-4o – Input 2.50, Output 10.00; GPT-4.1 – Input 2.00, Output 8.00; o3 – Input 2.00, Output 8.00; Gemini 2.5 Pro (<200,000) – Input 1.25, Output 10.00; GPT-5 – Input 1.25, Output 10.00; o4-mini – Input 1.10, Output 4.40; Claude 3.5 Haiku – Input 0.80, Output 4.00; GPT-4.1 mini – Input 0.40, Output 1.60; Gemini 2.5 Flash – Input 0.30, Output 2.50; GPT-5 Mini – Input 0.25, Output 2.00; GPT-4o mini – Input 0.15, Output 0.60; Gemini 2.5 Flash-Lite – Input 0.10, Output 0.40; GPT-4.1 Nano – Input 0.10, Output 0.40; Amazon Nova Lite – Input 0.06, Output 0.24; GPT-5 Nano – Input 0.05, Output 0.40; Amazon Nova Micro – Input 0.035, Output 0.14.
Simon Willison
@simon@fedi.simonwillison.net

I've had preview access to GPT-5 for a couple of weeks, so I have a lot to say about it. Here's my first post, focusing just on core characteristics, pricing (it's VERY competitively priced) and interesting details from the GPT-5 system card https://simonwillison.net/2025/Aug/7/gpt-5/