Bolt Data Shows GLM 5.3 Flash Leads Open Models at 54% Usage

Bolt rolled out Forge, an open-model mode, to its 11M+ users and published real three-day usage shares rather than benchmarks. GLM 5.3 Flash dominates with 54%, and open models are quickly becoming the platform's mainstay rather than a supplement.

Confirmed

• Bolt Forge ships with built-in open models including Kimi K3, DeepSeek V4 Pro, GLM 5.3 and GLM 5.3 Flash — no API key or extra configuration needed.
• Bolt opened the open models on Monday with up to 50x usage credits.
• Prompt share as of Wednesday: GLM 5.3 Flash 54% (more than all others combined), DeepSeek V4 Pro 17%, GLM 5.3 15%, remainder Kimi K3.
• Multiple reposts attribute the preference for GLM 5.3 Flash to it being the fastest and cheapest, with roughly 2x longer prompt support.

Why it matters

• This is real three-day usage data from a platform with 11M+ users, reflecting developer model preferences better than benchmarks.
• GLM 5.3 Flash's dominance suggests that low cost, speed and long-prompt support drive model selection, and open models are now production-ready mainstays.

Note: all 6 posts in this cluster are reposts; no original Bolt post was seen, so sourcerefs is left empty.

2026-09-18 ~ 2026-09-18 · 6 related posts

• GLM 5.3 Flash wins 54% share on Bolt's open-model rollout of 11M users — JafarNajafov · 2026-09-18
• GLM 5.3 Flash takes 54% of Bolt Forge prompts in three days, beating DeepSeek and Kimi combined — SimplyAnnisa · 2026-09-18
• Bolt Forge adds Kimi K3, DeepSeek V4 Pro and GLM 5.3 — Flash variant leads with 54% usage — SucceededMind · 2026-09-18

3 near-duplicate retellings: alifcoder · SimplyAnnisa · HeyAmit_