Compare GPT-5 Pro and GPT-1, both from OpenAI, in 6 community votes, gpt-5 pro wins 83% of head-to-head duels, context windows of 400K vs 1K, tested across 6 shared challenges. Updated April 2026.
GPT-5 Pro is the better choice overall, winning 83% of 6 blind community votes on Rival. Context windows: 400K vs 1K tokens. Compare their real outputs side by side below.
GPT-5 Pro is made by openai while GPT-1 is from openai. GPT-5 Pro has a 400K token context window compared to GPT-1's 1K. In community voting, In 6 community votes, GPT-5 Pro wins 83% of head-to-head duels.
In 6 community votes, GPT-5 Pro wins 83% of head-to-head duels. GPT-5 Pro leads in Image Generation. Based on blind community voting from the Rival open dataset of 6+ human preference judgments for this pair.
Pick GPT-5 Pro. In 6 blind votes, GPT-5 Pro wins 83% of the time. That's not luck.
GPT-5 Pro particularly excels in Image Generation.
GPT-1 uses 40.9x more transitions
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

Compare GPT-5 Pro and GPT-1, both from OpenAI, in 6 community votes, gpt-5 pro wins 83% of head-to-head duels, context windows of 400K vs 1K, tested across 6 shared challenges. Updated April 2026.
GPT-5 Pro is the better choice overall, winning 83% of 6 blind community votes on Rival. Context windows: 400K vs 1K tokens. Compare their real outputs side by side below.
GPT-5 Pro is made by openai while GPT-1 is from openai. GPT-5 Pro has a 400K token context window compared to GPT-1's 1K. In community voting, In 6 community votes, GPT-5 Pro wins 83% of head-to-head duels.
In 6 community votes, GPT-5 Pro wins 83% of head-to-head duels. GPT-5 Pro leads in Image Generation. Based on blind community voting from the Rival open dataset of 6+ human preference judgments for this pair.
Pick GPT-5 Pro. In 6 blind votes, GPT-5 Pro wins 83% of the time. That's not luck.
GPT-5 Pro particularly excels in Image Generation.
GPT-1 uses 40.9x more transitions
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

6 fights queued
6 fights queued