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Z.ai vs Meta
Both court Claude Code users with Anthropic compatible endpoints. Z.ai offers open weights and an $18 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 $0.15 in and $0.50 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 open, 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 credits cost double during weekday 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 150 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 new.
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. Its weights came out August 28 under a custom GLM-5.3 License that requires a security review for hosts with more than $10B in yearly revenue. GLM-5.3-Flash, a 320B multimodal model with 18B active, costs $0.15 in and $0.50 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 launched the Meta Model API with Muse Spark 1.1, a multimodal reasoning model aimed at agentic coding, tool use and computer use. At Meta Connect in September, Meta made the API generally available globally. Muse Spark 1.3 has a 1M token context and costs $1.25 in and $4.25 out per million tokens, with cached input at $0.15. Muse Wonder, released October 12, 2026, sits above it for longer, harder agent work at $4 in and $20 out, also with 1M context. The endpoint speaks OpenAI Chat Completions, Anthropic Messages and a stateful agentic format.
Example models: Muse Wonder, Muse Spark 1.3, Muse Spark Open
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, MIT on GLM-5.3-Flash and older
- 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 (GLM-5.3 License; MIT on Flash and older) | Closed API; open Muse Spark Open and Glimmer |
| Flagship models | GLM-5.3, GLM-5.3-Flash | Muse Wonder, Muse Spark 1.3, Muse Spark Open |
| 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–$4 in, $4.25–$20 out; Contributor tier cheaper |
| Customization | Open weights; GLM-5.3 License adds review for large hosts | Open Muse weights to fine-tune |
| Deployment | API, GLM Coding Plan | Meta Model API, Oracle Cloud |
| 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 open weights and an $18 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, MIT on GLM-5.3-Flash and older; 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–$4 in, $4.25–$20 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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