Mode VC Chart: Open Weights vs. Proprietary AI: The Gap Stays at 42 Points is answering right now. Last checked 10 min ago. It exposes 3 tools.
Open weights briefly beat every proprietary model in early 2025 (deepseek-r1); today the best.
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 21 October 2026. No other catalogue keeps this.
Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.
claude mcp add chart-open-weights-vs-proprietary-arena-gap --transport http https://modevc.com/api/mcp/chart-open-weights-vs-proprietary-arena-gap
https://modevc.com/api/mcp/chart-open-weights-vs-proprietary-arena-gap
[mcp_servers.chart-open-weights-vs-proprietary-arena-gap]
url = "https://modevc.com/api/mcp/chart-open-weights-vs-proprietary-arena-gap"
{
"mcpServers": {
"chart-open-weights-vs-proprietary-arena-gap": {
"url": "https://modevc.com/api/mcp/chart-open-weights-vs-proprietary-arena-gap"
}
}
}
{
"servers": {
"chart-open-weights-vs-proprietary-arena-gap": {
"type": "http",
"url": "https://modevc.com/api/mcp/chart-open-weights-vs-proprietary-arena-gap"
}
}
}
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
get_chart_data
search_charts
get_venture_chart_of_the_day
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://modevc.com/api/mcp/chart-open-weights-vs-proprietary-arena-gap | streamable-http | answering | 272 ms | 10 min ago |
The best open model trails the best closed model by 42 Arena points. In a blind vote it would.
On 11 Sept 2026, Claude's best model rates 40 points above OpenAI's and 16 above Gemini's..
qwen3.8-max trails claude-fable-5.1-max by 27 points. Over the past year the gap has stayed.
Google holds #1 in 6 of 8 Arena categories; Anthropic in 2. OpenAI has no category in the top.
Of 51 named model launches since 6 Jul 2026, 22 stated their weights: 18 closed, 4 open. All.
Google leads the Arena again; Anthropic trails by 22 points and OpenAI by 62. Query full.
14 models are statistically tied for #1 in Arena math, spanning 49 points. 4 are Flash models.
The gap between Arena's #1 and #10 models fell from 148 points in Feb 2024 to 18. #10 now wins.
Answers built from our own checks of this server.