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Z.ai vs Meta
Both court Claude Code users with Anthropic-compatible endpoints. Z.ai offers MIT weights and a flat coding plan; Meta offers a closed Muse API with media and a data-for-discount tier.
By The Subconscious Team · Updated
Z.ai vs Meta: key differences
Z.ai and Meta target the same developer from different directions. Both expose Anthropic-compatible endpoints, so Claude Code or a Claude SDK can point at either one. Z.ai's GLM-5.3 costs $1.40 in and $4.40 out, and GLM-5.3-Flash costs $0.075 in and $0.25 out. Meta's Muse Spark 1.3 costs $1.25 in and $4.25 out with a 1M window and cached input at $0.15, close to GLM-5.3 on list price. The bigger difference is openness. GLM weights are MIT-licensed, while Muse Spark is closed and only the distilled Muse Glimmer ships open.
Each has a cheap path with strings attached. Z.ai's GLM Coding Plan starts at $18 a month, but quota burns 2 to 3x faster on premium models during Beijing peak hours. Meta's Contributor tier drops to $0.10 in and $0.20 out, but Meta trains on your prompts and rate limits fall from 3,000 to 100 requests per minute. Meta adds image generation, transcription and search grounding on the same key. Z.ai's servers sit mostly in China, adding latency from the US and Europe, and Meta's API is still in public preview.
What Z.ai and Meta do
Z.ai
Z.AI is the international brand of Chinese lab Zhipu AI, maker of the GLM models. Its current flagship, GLM-5.3, shipped August 17, 2026 at $1.40 in and $4.40 out per million tokens, with cached input at $0.26. GLM-5.3-Flash costs $0.075 in and $0.25 out, and several older Flash models are priced at zero, a real free tier instead of trial credits. GLM-5, released in February 2026, is a 744B mixture-of-experts model under an MIT license, and at launch it ranked first among open-weight models on the Artificial Analysis index with a record-low hallucination score.
Example models: GLM-5.3, GLM-5.3-Flash
Full Z.ai profileMeta
Meta has moved from open Llama releases toward its own closed API. Meta Superintelligence Labs builds the Muse family, and in July 2026 Meta opened a public preview of the Meta Model API with Muse Spark 1.1, a multimodal reasoning model aimed at agentic coding, tool use and computer use. The current lineup runs through Muse Spark 1.3 with a 1M token context. Standard pricing is $1.25 in and $4.25 out per million tokens, with cached input at $0.15, and the endpoint speaks OpenAI Chat Completions, Anthropic Messages and a stateful agentic format.
Example models: Muse Spark 1.3, Muse Glimmer
Full Meta profileShould you choose Z.ai or Meta?
Z.ai
Choose Z.ai for
- Flat-rate agentic coding on the GLM Coding Plan
- Open weights with no license limits
- Near-free text calls on GLM-5.3-Flash
Meta
Choose Meta for
- Apps that need image, voice and text on one key
- Prototyping on the Contributor tier when data sharing is acceptable
- A 1M window at mid-tier prices
Z.ai vs Meta at a glance
| Attribute | Z.ai | Meta |
|---|---|---|
| Model access | Open weights (MIT) | Closed API; open Muse Glimmer |
| Flagship models | GLM-5.3, GLM-5.3-Flash | Muse Spark 1.3, Muse Glimmer |
| Speed | ~80 tok/s on GLM-5.3 | ~145–233 tok/s on Muse Spark 1.3 |
| Price | $1.40 in, $4.40 out (GLM-5.3); free Flash tier | $1.25 in, $4.25 out; Contributor tier cheaper |
| Customization | Open weights, no license limits | Open Muse Glimmer weights to fine-tune |
| Deployment | API, GLM Coding Plan | Meta Model API (preview) |
| Long context | 1M (GLM-5.3) | 1M |
Frequently asked questions
What is the difference between Z.ai and Meta?
Both court Claude Code users with Anthropic-compatible endpoints. Z.ai offers MIT weights and a flat coding plan; Meta offers a closed Muse API with media and a data-for-discount tier.
When should I choose Z.ai over Meta?
Flat-rate agentic coding on the GLM Coding Plan; Open weights with no license limits; Near-free text calls on GLM-5.3-Flash.
When should I choose Meta over Z.ai?
Apps that need image, voice and text on one key; Prototyping on the Contributor tier when data sharing is acceptable; A 1M window at mid-tier prices.
Is Z.ai or Meta cheaper?
Z.ai: $1.40 in, $4.40 out (GLM-5.3); free Flash tier. Meta: $1.25 in, $4.25 out; Contributor tier cheaper. The cheaper choice depends on the model and workload.
Which has more context, Z.ai or Meta?
Z.ai: 1M (GLM-5.3). Meta: 1M.
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