# Mistral AI vs Z.ai

> GLM-5.3 offers 1M context, MIT weights and a flat-rate coding plan from $18 a month. Mistral offers in-region hosting in Europe or the US and broad cloud reach.

Canonical: https://www.subconscious.dev/compare/mistral-ai-vs-z-ai · By The Subconscious Team · Updated September 30, 2026

## How they compare

Z.ai's GLM-5.3 costs $1.40 in and $4.40 out with a 1M context and runs around 80 tokens per second. GLM-5.3-Flash costs $0.075 in and $0.25 out, and several older Flash models are free. Mistral's closest match, Medium 3.5, costs $1.50 in and $7.50 out with 256K context, so GLM is cheaper on output and holds four times the context. Mistral's Small 4 at $0.15 in and Large 3 at $0.50 in fill the budget tiers. On licensing, GLM ships under MIT with no limits, and Mistral's Large 3 uses Apache 2.0. Both are practical to self-host or fine-tune from open weights.

Z.ai's growth comes from the GLM Coding Plan: $18 a month on Lite for a prompt quota that resets every five hours and weekly, which Z.ai says equals 15 to 30x the fee at API rates. An Anthropic-compatible endpoint lets Claude Code run on GLM with a few environment variables. The trade-offs are location and peak-hour limits. Z.ai's servers sit mostly in China, adding 100 to 200ms from the US or Europe, and the plan burns quota 2 to 3x faster on premium models during Beijing peak hours. Mistral runs EU and US regional endpoints, a Priority Tier with uptime SLAs, and listings on Azure, Bedrock and Vertex AI.

## What each one does

### Mistral AI

Mistral AI is a Paris lab that sells its models through La Plateforme, its own API, and releases most of them as open weights. It consolidated the lineup in 2026. Mistral Medium 3.5, released April 28, is a dense 128B model that merges instruction following, reasoning and coding into one set of weights, and it replaced both Devstral 2 and the Magistral reasoning models. It costs $1.50 in and $7.50 out per million tokens and scores 77.6% on SWE-Bench Verified by Mistral's count. Mistral Small 4, a 119B mixture-of-experts model with 6.5B active, costs $0.15 in and $0.60 out. Mistral Large 3, a 675B MoE under Apache 2.0, runs $0.50 in and $1.50 out. All three carry a 256K context window.

### 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.

## Which is best, and when

### Choose Mistral AI for

- Low-latency serving in Europe or the US
- Enterprise procurement through major clouds
- Priority Tier uptime SLAs

### Choose Z.ai for

- Cheap agentic coding inside Claude Code
- Flat-rate monthly coding budgets
- 1M-context work at $1.40 in

## At a glance

| Attribute | Mistral AI | Z.ai |
|---|---|---|
| Model access | Open weights, plus closed Codestral | Open weights (MIT) |
| Flagship models | Mistral Medium 3.5, Small 4, Large 3 | GLM-5.3, GLM-5.3-Flash |
| Speed | - | ~80 tok/s on GLM-5.3 |
| Price | $0.15–$1.50 in, $0.60–$7.50 out per 1M | $1.40 in, $4.40 out (GLM-5.3); free Flash tier |
| Customization | Forge (enterprise); fine-tuning API deprecated | Open weights, no license limits |
| Deployment | API, Azure, Bedrock, Vertex, self-host | API, GLM Coding Plan |
| Long context | 256K | 1M (GLM-5.3) |

## FAQ

### What is the difference between Mistral AI and Z.ai?

GLM-5.3 offers 1M context, MIT weights and a flat-rate coding plan from $18 a month. Mistral offers in-region hosting in Europe or the US and broad cloud reach.

### When should I choose Mistral AI over Z.ai?

Low-latency serving in Europe or the US; Enterprise procurement through major clouds; Priority Tier uptime SLAs.

### When should I choose Z.ai over Mistral AI?

Cheap agentic coding inside Claude Code; Flat-rate monthly coding budgets; 1M-context work at $1.40 in.

### Is Mistral AI or Z.ai cheaper?

Mistral AI: $0.15–$1.50 in, $0.60–$7.50 out per 1M. Z.ai: $1.40 in, $4.40 out (GLM-5.3); free Flash tier. The cheaper choice depends on the model and workload.

### Which has more context, Mistral AI or Z.ai?

Mistral AI: 256K. Z.ai: 1M (GLM-5.3).

## Running long-horizon agents?

If your agents run past 200K tokens, compare both against Subconscious: [Subconscious vs Mistral AI](https://www.subconscious.dev/compare/subconscious-vs-mistral-ai.md), [Subconscious vs Z.ai](https://www.subconscious.dev/compare/subconscious-vs-z-ai.md).

Full profiles: [Mistral AI](https://www.subconscious.dev/providers/mistral-ai.md), [Z.ai](https://www.subconscious.dev/providers/z-ai.md).