GLM-5.3-Flash vs Mistral Large 4 High compared

GLM-5.3-Flash and Mistral Large 4 (High) are close rivals from Z AI and Mistral. The clearest gap is on the bill: Mistral Large 4 High is 4.4 times the blended price of GLM-5.3-Flash. Everything below is read from the benchmark, price and speed data in Franklin AI's catalogue; nothing here comes from a hands-on test.

Running costs

Per million tokens, GLM-5.3-Flash charges $0.15 for input and $0.50 for output, while Mistral Large 4 High charges $0.70 and $2.10. For output tokens, Mistral Large 4 High is 4.2 times the price of GLM-5.3-Flash.

For a sample workload of 1 million input tokens and 200,000 output tokens, GLM-5.3-Flash would cost $0.25 and Mistral Large 4 High $1.12, a difference of $0.87. A bigger example, a support assistant answering 10,000 conversations of 2,000 input and 500 output tokens each, costs $5.50 on GLM-5.3-Flash and $24.50 on Mistral Large 4 High: a gap of $19.00. Blended at three input tokens per output token, the effective rates are $0.238 for GLM-5.3-Flash and $1.05 for Mistral Large 4 High.

Reasoning and overall scores

GLM-5.3-Flash records 27.8 on the intelligence index and Mistral Large 4 High records 26.1. The lead is visible but narrow, so it should not decide the choice on its own. Put another way, Mistral Large 4 High would need 7% more on this index to draw level.

Across the 109 active models with an intelligence score in the catalogue, GLM-5.3-Flash ranks 63rd and Mistral Large 4 High ranks 65th.

There are no coding or math index scores for either model in the catalogue, which keeps this comparison at the aggregate level.

When they came out

The release dates are August 26, 2026 for GLM-5.3-Flash and October 29, 2026 for Mistral Large 4 High, about 2 months apart.

Mistral Large 4 High is the faster writer

Measured output speed is 56 tokens per second for GLM-5.3-Flash and 139 tokens per second for Mistral Large 4 High. That makes Mistral Large 4 High roughly 2.5 times as fast at writing. The wait for the first token averages 1.6 seconds on GLM-5.3-Flash against 1.7 seconds on Mistral Large 4 High.

Put together, a 1,000-token answer would take about 20 seconds from GLM-5.3-Flash and 8.9 seconds from Mistral Large 4 High, counting the first-token wait. Counting that wait, Mistral Large 4 High only pulls ahead on outputs beyond about 50 tokens.

Score per dollar

A blunt value measure, blended price over intelligence score, puts GLM-5.3-Flash at $0.0085 and Mistral Large 4 High at $0.040 per point. With the higher score and the lower cost per point, GLM-5.3-Flash is the better value per point on these numbers.