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Gemini 3 Flash vs GLM-5.3-Flash

GLM-5.3-Flash significantly outperforms across most benchmarks. GLM-5.3-Flash is 4.7x cheaper per token.

Google · Zhipu AI · Updated for 2026

Which is better?

Gemini 3 Flash outperforms in 0 benchmarks, while GLM-5.3-Flash is better at 3 benchmarks (CharXiv-R, Humanity's Last Exam, Toolathlon). GLM-5.3-Flash significantly outperforms across most benchmarks.

On price, GLM-5.3-Flash is roughly 4.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current benchmark, pricing, and model metadata for 2026.

Choose Gemini 3 Flash

  • you want predictable pricing at $0.50/M input and $3.00/M output

Choose GLM-5.3-Flash

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
  • cost matters — it's about 4.7x cheaper per token
  • you want the most recent training data — it shipped Aug 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Gemini 3 Flash
Google
GLM-5.3-Flash
Zhipu AI
Benchmark wins
0 of 3
3 of 3
Input price
$0.50 / M
$0.15 / M
Output price
$3.00 / M
$0.50 / M
Context window
1,000,000
1,000,000
Released
Dec 2025
Aug 2026
License
Proprietary
MIT

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemini 3 Flash outperforms in 0 benchmarks, while GLM-5.3-Flash is better at 3 benchmarks (CharXiv-R, Humanity's Last Exam, Toolathlon).

GLM-5.3-Flash significantly outperforms across most benchmarks.

Wed Aug 26 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

GLM-5.3-Flash costs less

For input processing, Gemini 3 Flash ($0.50/1M tokens) is 3.3x more expensive than GLM-5.3-Flash ($0.15/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 6.0x more expensive than GLM-5.3-Flash ($0.50/1M tokens).

In conclusion, Gemini 3 Flash is more expensive than GLM-5.3-Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Wed Aug 26 2026 • llm-stats.com
Google
Gemini 3 Flash
Input tokens$0.50
Output tokens$3.00
Best providerGoogle
Zhipu AI
GLM-5.3-Flash
Input tokens$0.15
Output tokens$0.50
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,000,000 tokens. GLM-5.3-Flash can generate longer responses up to 131,072 tokens, while Gemini 3 Flash is limited to 65,536 tokens.

Google
Gemini 3 Flash
Input1,000,000 tokens
Output65,536 tokens
Zhipu AI
GLM-5.3-Flash
Input1,000,000 tokens
Output131,072 tokens
Wed Aug 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3 Flash and GLM-5.3-Flash support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 3 Flash

Text
Images
Audio
Video

GLM-5.3-Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Gemini 3 Flash is licensed under a proprietary license, while GLM-5.3-Flash uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Gemini 3 Flash

Proprietary

Closed source

GLM-5.3-Flash

MIT

Open weights

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while GLM-5.3-Flash was released on 2026-08-26.

GLM-5.3-Flash is 8 months newer than Gemini 3 Flash.

Gemini 3 Flash

Dec 17, 2025

8 months ago

GLM-5.3-Flash

Aug 26, 2026

0 days ago

8mo newer

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a documented knowledge cutoff of 2025-01-31, while GLM-5.3-Flash's cutoff date is not specified.

We can confirm Gemini 3 Flash's training data extends to 2025-01-31, but cannot make a direct comparison without GLM-5.3-Flash's cutoff date.

Gemini 3 Flash

Jan 2025

GLM-5.3-Flash

—

Provider Availability

Gemini 3 Flash is available from Google. GLM-5.3-Flash is available from ZAI.

Gemini 3 Flash

google logo
Google
Input Price:Input: $0.50/1MOutput Price:Output: $3.00/1M

GLM-5.3-Flash

z logo
Unknown Organization
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 3 Flash and GLM-5.3-Flash side-by-side, then vote on the output you prefer.

Gemini 3 Flash
✓ Preferred
GLM-5.3-Flash
Open in Playground

FAQ

Common questions about Gemini 3 Flash vs GLM-5.3-Flash.

Which is better, Gemini 3 Flash or GLM-5.3-Flash?

GLM-5.3-Flash significantly outperforms across most benchmarks. Gemini 3 Flash is made by Google and GLM-5.3-Flash is made by Zhipu AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3 Flash compare to GLM-5.3-Flash in benchmarks?

Gemini 3 Flash scores Vending-Bench 2: 100.0%, AIME 2025: 99.7%, Global PIQA: 92.8%, MMMLU: 91.8%, GPQA: 90.4%. GLM-5.3-Flash scores CharXiv-R: 89.4%, Terminal-Bench 2.1: 84.3%, MMVU: 80.5%, Toolathlon: 78.4%, MVBench: 77.8%.

Is Gemini 3 Flash cheaper than GLM-5.3-Flash?

GLM-5.3-Flash is 3.3x cheaper for input tokens. Gemini 3 Flash costs $0.50/M input and $3.00/M output via google. GLM-5.3-Flash costs $0.15/M input and $0.50/M output via z.

What are the context window sizes for Gemini 3 Flash and GLM-5.3-Flash?

Gemini 3 Flash supports 1.0M tokens and GLM-5.3-Flash supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3 Flash and GLM-5.3-Flash?

Key differences include input pricing ($0.50 vs $0.15/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3 Flash and GLM-5.3-Flash?

Gemini 3 Flash is developed by Google and GLM-5.3-Flash is developed by Zhipu AI.

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