Gemini 3.5 Flash vs GLM-5.3
GLM-5.3 leads the LLM Stats Score 54.2 to 43.6. GLM-5.3 is 1.6x cheaper per token.
Google · Zhipu AI · Updated for 2026
Which is better?
GLM-5.3 leads the overall LLM Stats Score 54.2 to 43.6, ranking #6 overall.
In the 3 individual benchmarks reported for both models, GLM-5.3 wins 3; this is a narrower head-to-head signal than the composite indexes.
On price, GLM-5.3 is roughly 1.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 3.5 Flash
- you want predictable pricing at $1.50/M input and $9.00/M output
Choose GLM-5.3
- overall performance matters — it scores 54.2 and ranks #6 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 3 of 3 exact shared results
- cost matters — it's about 1.6x cheaper per token
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
16 reported for Gemini 3.5 Flash · 16 for GLM-5.3
Gemini 3.5 Flash outperforms in 0 benchmarks, while GLM-5.3 is better at 3 benchmarks (DeepSWE 1.1, Humanity's Last Exam, Toolathlon).
GLM-5.3 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 3.5 Flash ($1.50/1M tokens) is 1.1x more expensive than GLM-5.3 ($1.40/1M tokens).
For output processing, Gemini 3.5 Flash ($9.00/1M tokens) is 2.0x more expensive than GLM-5.3 ($4.40/1M tokens).
In conclusion, Gemini 3.5 Flash is more expensive than GLM-5.3.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,048,576 tokens. GLM-5.3 can generate longer responses up to 131,072 tokens, while Gemini 3.5 Flash is limited to 65,536 tokens.
Input capabilities
Documented input modalities across available providers
Gemini 3.5 Flash supports multimodal inputs, whereas GLM-5.3 does not.
Gemini 3.5 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.
Gemini 3.5 Flash
GLM-5.3
Release Timeline
When each model was launched
Gemini 3.5 Flash was released on 2026-05-19, while GLM-5.3 was released on 2026-08-14.
GLM-5.3 is 3 months newer than Gemini 3.5 Flash.
May 19, 2026
3 months ago
Aug 14, 2026
2 weeks ago
2mo newerKnowledge Cutoff
When training data ends
Gemini 3.5 Flash has a documented knowledge cutoff of 2026-01-31, while GLM-5.3's cutoff date is not specified.
We can confirm Gemini 3.5 Flash's training data extends to 2026-01-31, but cannot make a direct comparison without GLM-5.3's cutoff date.
Jan 2026
—
Provider Availability
Gemini 3.5 Flash is available from Google. GLM-5.3 is available from Novita, ZAI.
Gemini 3.5 Flash
GLM-5.3
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 3.5 Flash and GLM-5.3 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 3.5 Flash vs GLM-5.3.