Who remembers this from September 2024? GPT-5: either 3-5T parameters or 3.5T, according to Samsung execs
@petergostev
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Testing Multiple AI Models: Horizon vs GPT-5 Comparison
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Same, I'm confused by all the models they've been testing. They feel quite different from one another. Horizon better not be GPT-5, the anonymous chatbot they were testing 3 weeks ago was the real deal
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OpenAI’s Open-Source Models Beat Commercial Pricing Benchmarks
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As benchmarks for OpenAI's new open-source models roll in, one thing to keep in mind is how cheap they actually are: – GPT OSS 20b is cheaper than Gemini 2.5 Flash Light or GPT-4.1-Nano.
– GPT OSS 120b is cheaper than recent open-source models from China (e.g., Kimi K2 or GLM -
Opus 4.1 vs Opus 4.0 Performance Comparison Test Results
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Quick test of Opus 4.1 vs Opus 4.0 and other models. Using prompt from @FeatureCrewPod as well as a new prompt for Colosseum simulation.
— Peter Gostev (@petergostev) 5 août 2025
My sense is that Opus 4.0 was kind of busted for these tests – too many errors and quality was ok. 4.1 is not at around Sonnet level, so… pic.twitter.com/fYb5kD9ExEQuick test of Opus 4.1 vs Opus 4.0 and other models. Using prompt from @FeatureCrewPod as well as a new prompt for Colosseum simulation. My sense is that Opus 4.0 was kind of busted for these tests – too many errors and quality was ok. 4.1 is not at around Sonnet level, so
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Improving reasoning performance on AI model endpoints
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I couldn't get the reasoning higher on the endpoints I was testing, so that's another hope for better outputs
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OpenAI Open Source Models 120B and 20B MoE Tested
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A quick test of the @OpenAI new open source models: 120b and 20b MoE models. With the @FeatureCrewPod planet generation prompt
— Peter Gostev (@petergostev) 5 août 2025
The comparison is to the best one I've seen – a yet unreleased OpenAI model, but then Sonnet 4, Kimi K2, Qwen 3 Coder and GLM-4.5 for comparison. The… pic.twitter.com/a4bh1WclKVA quick test of the @OpenAI new open source models: 120b and 20b MoE models. With the @FeatureCrewPod planet generation prompt The comparison is to the best one I've seen – a yet unreleased OpenAI model, but then Sonnet 4, Kimi K2, Qwen 3 Coder and GLM-4.5 for comparison. The
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Recraft Crisp Upscale: Affordable AI Image Upscaling Tool
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This sizing is a bit weird, so we use this upscaler https://
replicate.com/recraft-ai/rec
raft-crisp-upscale
… – pretty good and cheap -
Beyond Labels: Rethinking AI Intelligence and Human Definitions
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The most boring and pointless discussions in AI, I find, are about definitions: can models "think"? Can they "reason"? What is AGI? What about ASI? The real answer is that AI is different from humans, and intelligence evolves in a different way. Any labels we put on it are
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Estimating LLM Sizes: GPT-3 vs GPT-4 Parameters
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Not completely made up actually – best guess more like. If you look at the size of GPT-3 and GPT-4, they reflect the relative size for each model (175b vs rumoured 1.8t for GPT-4). Then for the others I reduced the size for the models based on their price – so yes we don't know,
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OpenAI and Anthropic Revenue Growth Comparison 2025
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OpenAI and Anthropic both are showing pretty spectacular growth in 2025, with OpenAI doubling ARR in the last 6 months from $6bn to $12bn and Anthropic increasing 5x from $1bn to $5bn in 7 months. If we compare the sources of revenue, the picture is quite interesting:
– OpenAI