GLM-4.5 vs Sonar Large
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 · Sonar Large specs- PriceSonar Large
Sonar Large publishes pricing ($1.00 / 1M output tokens) while GLM-4.5 does not.
- Context windowGLM-4.5
GLM-4.5 accepts 128K tokens vs 127K, 1.0× 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 Sonar Large.
- OpennessGLM-4.5
GLM-4.5 ships open weights (MIT); Sonar Large is API-only.
On balance GLM-4.5 edges ahead, winning 3 of 5 categories against Sonar Large's 1. Sonar Large publishes pricing ($1.00 / 1M output tokens) while GLM-4.5 does not. GLM-4.5 accepts 128K tokens vs 127K, 1.0× 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 Sonar Large handles text, which can be the deciding factor before you even look at benchmarks. GLM-4.5 ships open weights (MIT); Sonar Large is API-only.
GLM-4.5 is the newer of the two, released 8 months after Sonar Large, 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 Sonar Large sees more deployments in research agent and rag. 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 | Sonar Large |
|---|---|---|
| Provider | Other | Perplexity |
| Released | Jul 2025 | Nov 2024 |
| Modalities | text, vision | text |
| Context window | 128K tokens | 127K tokens |
| Max output | , | , |
| Input · 1M | Pricing not published | $1.00 / 1M tokens |
| Output · 1M | Pricing not published | $1.00 / 1M tokens |
| Knowledge cutoff | , | , |
| Open weights | Yes (MIT) | No |
| API available | Yes | Yes |
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 $4.50
- Heavy usage, 1M in / 500k out per day, vs $45.00
- RAG workload, 5M in / 200k out per day, vs $156
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
- Sonar Large$0.150
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
- Self-hosting and on-prem requirements, open weights (MIT).
- Multimodal needs covering vision.
Sonar Large fits when…
- Web-search grounded
- Citation-first output
- Cheap
Consider DBRX
Databricks' 132B MoE, a notable 2024 open-weight release tuned for enterprise.
Frequently asked
Is GLM-4.5 or Sonar Large 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 127K for Sonar Large.Is GLM-4.5 or Sonar Large better for coding?
Both GLM-4.5 and Sonar Large 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?
GLM-4.5 ships open weights (MIT). Sonar Large is API-only.When were GLM-4.5 and Sonar Large released?
GLM-4.5 was released by Other on 2025-07-28. Sonar Large was released by Perplexity on 2024-11-19.
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