GLM-4.5 vs SmolLM2 1.7B
A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.
Updated
GLM-4.5 specs · SmolLM2 1.7B specs- PriceTie
Neither model publishes per-token API pricing.
- Context windowGLM-4.5
GLM-4.5 accepts 128K tokens vs 8.2K, 15.6× the room for long documents and codebases.
- BenchmarksTie
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.
- ModalitiesGLM-4.5
GLM-4.5 supports 2 modalities (text, vision) vs 1 for SmolLM2 1.7B.
- OpennessTie
Both ship open weights, self-host either one.
On balance GLM-4.5 edges ahead, winning 2 of 5 categories against SmolLM2 1.7B's 0. Neither model publishes per-token API pricing. GLM-4.5 accepts 128K tokens vs 8.2K, 15.6× the room for long documents and codebases.
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. They differ in modality coverage, GLM-4.5 handles text, vision while SmolLM2 1.7B handles text, which can be the deciding factor before you even look at benchmarks. Both ship open weights, self-host either one.
GLM-4.5 is the newer of the two, released 9 months after SmolLM2 1.7B, which usually means a more recent knowledge cutoff and updated safety post-training. GLM-4.5 is usually picked for chinese llm and open source llm workloads, while SmolLM2 1.7B sees more deployments in on device and edge deployment. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.
Side-by-side specs
| Spec | GLM-4.5 | SmolLM2 1.7B |
|---|---|---|
| Provider | Other | Other |
| Released | Jul 2025 | Nov 2024 |
| Modalities | text, vision | text |
| Context window | 128K tokens | 8.2K tokens |
| Max output | , | , |
| Input · 1M | Pricing not published | Pricing not published |
| Output · 1M | Pricing not published | Pricing not published |
| Knowledge cutoff | , | , |
| Open weights | Yes (MIT) | Yes (Apache-2.0) |
| API available | Yes | No |
Pricing at scale
What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.
- Light usage, 100k in / 50k out per day, vs ,
- Heavy usage, 1M in / 500k out per day, vs ,
- RAG workload, 5M in / 200k out per day, vs ,
Light usage, 100k in / 50k out per day: pricing not directly comparable (one or both models are missing public per-token rates). Heavy usage, 1M in / 500k out per day: pricing not directly comparable (one or both models are missing public per-token rates). RAG workload, 5M in / 200k out per day: pricing not directly comparable (one or both models are missing public per-token rates).
Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.
- GLM-4.5Pricing unavailable
- SmolLM2 1.7BPricing unavailable
Benchmarks compared
Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.
GLM-4.5 fits when…
- MIT license
- Strong Chinese
- Multimodal
- Long-context tasks, handles 128K tokens vs 8.2K for SmolLM2 1.7B.
- Multimodal needs covering vision.
SmolLM2 1.7B fits when…
- Truly tiny
- Apache-2.0
- Runs on phones
Consider DBRX
Databricks' 132B MoE, a notable 2024 open-weight release tuned for enterprise.
Frequently asked
Is GLM-4.5 or SmolLM2 1.7B cheaper?
Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.Which has the larger context window?
GLM-4.5 accepts 128K tokens vs 8.2K for SmolLM2 1.7B.Is GLM-4.5 or SmolLM2 1.7B better for coding?
Both GLM-4.5 and SmolLM2 1.7B are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.Are either of these models open source?
Both ship with open weights. GLM-4.5 is licensed under MIT; SmolLM2 1.7B under Apache-2.0.When were GLM-4.5 and SmolLM2 1.7B released?
GLM-4.5 was released by Other on 2025-07-28. SmolLM2 1.7B was released by Other on 2024-11-01.
The week's AI launches, in your inbox.
One short email every Friday, new models, leaks, and quietly-shipped APIs you missed.