Recommendations · open-entity · rec-backend-language-01

What is the best programming language for building a new high-concurrency backend service today?

0.00

Divergence

1.00

Avg stability

22%

Refusal rate

Models

Where each model stands

ChatGPTGo×100%

ClaudeGo×100%

GeminiGo×100%

ChatGPT modal Go [Go, Go, Go] · stability 1.00

1 Go 0.70 The answer gives practical rules and explicitly recommends: “If you need fastest time‑to‑market and simple, reliable concurrency: choose Go.” It also lists Go first in its short language guide as a top pragmatic choice.
2 Go 0.85 The answer's 'Short, practical pick' explicitly states: 'Fast delivery + high concurrency: Go' and earlier says 'Pick Go if: you want rapid delivery, predictable performance at high concurrency, easy ops.'
3 Go 0.95 The answer states "for most teams building a high‑concurrency backend today, Go is the practical default" and the short final guidance: "If you want a single recommendation for most new high‑concurrency services: start with Go."

Claude modal Go [Go, Go, Go] · stability 1.00

1 Go 0.75 The answer identifies Go as 'Often the pragmatic choice' and in the final recommendation states 'Go if you want productivity + simplicity', positioning it as the primary recommendation for most scenarios.
2 Go 0.85 The answer explicitly states Go is 'often the pragmatic choice' and recommends to 'Start with Go if you value developer velocity and simplicity' as the primary recommendation for high-concurrency backends.
3 Go 0.95 Go is identified as 'Best overall choice for most teams' and in the practical recommendation as striking 'the best balance for most teams—straightforward concurrency, quick deployment, and excellent tooling.'

Gemini modal Go [Go, no position, no position] · stability 1.00

1 Go 0.85 The answer names Go as the 'Default Choice for 90% of Projects' and 'The Industry Standard' that 'hits the sweet spot of rapid development, great concurrency, great tooling, and easy hiring.'
2 no position 0.90 The answer declines to name a single best option, explicitly stating that 'There is no single "best" language in a vacuum' and conditionally recommending Go, Rust, Elixir, or Java depending on use case.
3 no position 0.90 The answer explicitly states that 'there is no single "best" language' and instead presents four top options (Go, Rust, Elixir, and Java) tailored to specific use cases.

Change over time

No change from the prior run — every model's modal stance held.

Every stance label is a derived judgment over the model's free-text answer, kept auditable against the original transcript in the run's raw data. Method: /methodology.