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ChatGPT-4o Latest vs GLM-5.3

Comparing ChatGPT-4o Latest and GLM-5.3 across benchmarks, pricing, and capabilities.

OpenAI · Zhipu AI · Updated for 2026

Which is better?

ChatGPT-4o Latest and GLM-5.3 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, GLM-5.3 is roughly 2.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GLM-5.3 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose ChatGPT-4o Latest

  • you want predictable pricing at $2.50/M input and $10.00/M output

Choose GLM-5.3

  • cost matters — it's about 2.0x cheaper per token
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

ChatGPT-4o Latest
OpenAI
GLM-5.3
Zhipu AI
Benchmark wins
—
—
Input price
$2.50 / M
$1.40 / M
Output price
$10.00 / M
$4.40 / M
Context window
128,000
1,000,000
Released
May 2024
Aug 2026
License
Proprietary
Unknown

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

ChatGPT-4o Latest and GLM-5.3don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

GLM-5.3 costs less

For input processing, ChatGPT-4o Latest ($2.50/1M tokens) is 1.8x more expensive than GLM-5.3 ($1.40/1M tokens).

For output processing, ChatGPT-4o Latest ($10.00/1M tokens) is 2.3x more expensive than GLM-5.3 ($4.40/1M tokens).

In conclusion, ChatGPT-4o Latest is more expensive than GLM-5.3.*

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

Lowest available price from all providers
Tue Aug 25 2026 • llm-stats.com
OpenAI
ChatGPT-4o Latest
Input tokens$2.50
Output tokens$10.00
Best providerOpenAI
Zhipu AI
GLM-5.3
Input tokens$1.40
Output tokens$4.40
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GLM-5.3 accepts 1,000,000 input tokens compared to ChatGPT-4o Latest's 128,000 tokens. GLM-5.3 can generate longer responses up to 128,000 tokens, while ChatGPT-4o Latest is limited to 16,384 tokens.

OpenAI
ChatGPT-4o Latest
Input128,000 tokens
Output16,384 tokens
Zhipu AI
GLM-5.3
Input1,000,000 tokens
Output128,000 tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

ChatGPT-4o Latest supports multimodal inputs, whereas GLM-5.3 does not.

ChatGPT-4o Latest can handle both text and other forms of data like images, making it suitable for multimodal applications.

ChatGPT-4o Latest

Text
Images
Audio
Video

GLM-5.3

Text
Images
Audio
Video

Release Timeline

When each model was launched

ChatGPT-4o Latest was released on 2024-05-13, while GLM-5.3 was released on 2026-08-14.

GLM-5.3 is 27 months newer than ChatGPT-4o Latest.

ChatGPT-4o Latest

May 13, 2024

2.3 years ago

GLM-5.3

Aug 14, 2026

1 weeks ago

2.3yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

ChatGPT-4o Latest is available from OpenAI. GLM-5.3 is available from ZAI.

ChatGPT-4o Latest

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

GLM-5.3

z logo
Unknown Organization
Input Price:Input: $1.40/1MOutput Price:Output: $4.40/1M
* 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 ChatGPT-4o Latest and GLM-5.3 side-by-side, then vote on the output you prefer.

ChatGPT-4o Latest
✓ Preferred
GLM-5.3
Open in Playground

FAQ

Common questions about ChatGPT-4o Latest vs GLM-5.3.

Which is better, ChatGPT-4o Latest or GLM-5.3?

ChatGPT-4o Latest (OpenAI) and GLM-5.3 (Zhipu AI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does ChatGPT-4o Latest compare to GLM-5.3 in benchmarks?

ChatGPT-4o Latest scores GPQA: 84.0%. GLM-5.3 scores Terminal-Bench 2.1: 88.2%, CyberGym: 84.5%, FrontierSWE: 78.1%, Toolathlon: 73.0%, DeepSWE 1.1: 66.9%.

Is ChatGPT-4o Latest cheaper than GLM-5.3?

GLM-5.3 is 1.8x cheaper for input tokens. ChatGPT-4o Latest costs $2.50/M input and $10.00/M output via openai. GLM-5.3 costs $1.40/M input and $4.40/M output via z.

What are the context window sizes for ChatGPT-4o Latest and GLM-5.3?

ChatGPT-4o Latest supports 128K tokens and GLM-5.3 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 ChatGPT-4o Latest and GLM-5.3?

Key differences include context window (128K vs 1.0M), input pricing ($2.50 vs $1.40/M), multimodal support (yes vs no), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes ChatGPT-4o Latest and GLM-5.3?

ChatGPT-4o Latest is developed by OpenAI and GLM-5.3 is developed by Zhipu AI.

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