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

Bolt rolled out an open-model usage mode to its 11 million-plus users and shared real usage shares (not benchmark scores) from the first three days, showing open-source models are quickly becoming the platform's mainstay rather than a supplement.

Confirmed

• The Bolt platform (its Forge mode) directly bundles open-source models including Kimi K3, DeepSeek V4 Pro, GLM 5.3, and GLM 5.3 Flash — no API key or extra configuration needed; just pick a model and start building.
• On Monday, Bolt opened open models to users with up to 50x the usage quota.
• Prompt share as of Wednesday: GLM 5.3 Flash led with 54%, more than the other three combined; DeepSeek V4 Pro took 17%, GLM 5.3 took 15%, and the rest went to Kimi K3.
• Why users prefer GLM 5.3 Flash: multiple reposts describe it as the fastest and cheapest option, and it supports roughly 2x longer prompts.

Why it matters

• This reflects actual usage data from a large-scale real user base (11M+), which says more about developers' model preferences than benchmarks do.
• GLM 5.3 Flash's dominance (54%) shows that free/low pricing, speed, and long-prompt support are the key drivers of developer model choice, and that open-source models have become true productivity mainstays.

Note: all 5 posts in this cluster are reposts; the original Bolt announcement was not found, so sourcerefs is left empty.

2026-09-18 ~ 2026-09-18 · 5 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

2 near-duplicate retellings: alifcoder · SimplyAnnisa