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GLM-4.5V vs GPT-6 Astra

Comparing GLM-4.5V and GPT-6 Astra across benchmarks, pricing, and capabilities.

Zhipu AI · OpenAI · Updated for 2026

Which is better?

GLM-4.5V and GPT-6 Astra trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, GLM-4.5V is roughly 20.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-6 Astra also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose GLM-4.5V

  • cost matters — it's about 20.8x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose GPT-6 Astra

  • you process long inputs — it offers a 1,050,000 token context window
  • you want the most recent training data — it shipped Sep 2026

At a glance

The differences that matter most.

GLM-4.5V
Zhipu AI
GPT-6 Astra
OpenAI
Benchmark wins
—
—
Input price
$0.55 / M
$10.00 / M
Output price
$2.19 / M
$50.00 / M
Context window
131,072
1,050,000

Individual benchmarks

0 reported for GLM-4.5V · 22 for GPT-6 Astra

No common benchmarks found

GLM-4.5V and GPT-6 Astradon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

GLM-4.5V costs less

For input processing, GLM-4.5V ($0.55/1M tokens) is 18.2x cheaper than GPT-6 Astra ($10.00/1M tokens).

For output processing, GLM-4.5V ($2.19/1M tokens) is 22.8x cheaper than GPT-6 Astra ($50.00/1M tokens).

In conclusion, GPT-6 Astra is more expensive than GLM-4.5V.*

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

Lowest available price from all providers
Sat Sep 05 2026 • llm-stats.com
Zhipu AI
GLM-4.5V
Input tokens$0.55
Output tokens$2.19
Best providerFireworks
OpenAI
GPT-6 Astra
Input tokens$10.00
Output tokens$50.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-6 Astra accepts 1,050,000 input tokens compared to GLM-4.5V's 131,072 tokens. GLM-4.5V can generate longer responses up to 131,072 tokens, while GPT-6 Astra is limited to 128,000 tokens.

Zhipu AI
GLM-4.5V
Input131,072 tokens
Output131,072 tokens
OpenAI
GPT-6 Astra
Input1,050,000 tokens
Output128,000 tokens
Sat Sep 05 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GLM-4.5V and GPT-6 Astra support multimodal inputs.

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

GLM-4.5V

Text
Images
Audio
Video

GPT-6 Astra

Text
Images
Audio
Video

License

Usage and distribution terms

GLM-4.5V is licensed under MIT, while GPT-6 Astra uses a proprietary license.

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

GLM-4.5V

MIT

Open weights

GPT-6 Astra

Proprietary

Closed source

Release Timeline

When each model was launched

GLM-4.5V was released on 2025-08-11, while GPT-6 Astra was released on 2026-09-04.

GPT-6 Astra is 13 months newer than GLM-4.5V.

GLM-4.5V

Aug 11, 2025

1.1 years ago

GPT-6 Astra

Sep 4, 2026

1 days ago

1.1yr newer

Knowledge Cutoff

When training data ends

GPT-6 Astra has a documented knowledge cutoff of 2026-04-30, while GLM-4.5V's cutoff date is not specified.

We can confirm GPT-6 Astra's training data extends to 2026-04-30, but cannot make a direct comparison without GLM-4.5V's cutoff date.

GLM-4.5V

—

GPT-6 Astra

Apr 2026

Provider Availability

GLM-4.5V is available from Fireworks, Novita. GPT-6 Astra is available from OpenAI.

GLM-4.5V

fireworks logo
Fireworks
Input Price:Input: $0.55/1MOutput Price:Output: $2.19/1M
novita logo
Novita
Input Price:Input: $0.60/1MOutput Price:Output: $2.20/1M

GPT-6 Astra

openai logo
OpenAI
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M
* 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 GLM-4.5V and GPT-6 Astra side-by-side, then vote on the output you prefer.

GLM-4.5V
✓ Preferred
GPT-6 Astra
Open in Playground

FAQ

Common questions about GLM-4.5V vs GPT-6 Astra.

Which is better, GLM-4.5V or GPT-6 Astra?

GLM-4.5V (Zhipu AI) and GPT-6 Astra (OpenAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GLM-4.5V compare to GPT-6 Astra in benchmarks?

GPT-6 Astra scores ExploitBench: 100.0%, ARC-AGI-3: 99.9%, ARC-AGI: 98.5%, FrontierMath Tier 4 (v2): 97.6%, GPQA: 96.0%.

Is GLM-4.5V cheaper than GPT-6 Astra?

GLM-4.5V is 18.2x cheaper for input tokens. GLM-4.5V costs $0.55/M input and $2.19/M output via fireworks. GPT-6 Astra costs $10.00/M input and $50.00/M output via openai.

What are the context window sizes for GLM-4.5V and GPT-6 Astra?

GLM-4.5V supports 131K tokens and GPT-6 Astra supports 1.1M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GLM-4.5V and GPT-6 Astra?

Key differences include context window (131K vs 1.1M), input pricing ($0.55 vs $10.00/M), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes GLM-4.5V and GPT-6 Astra?

GLM-4.5V is developed by Zhipu AI and GPT-6 Astra is developed by OpenAI.

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