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GLM-5.3 vs Grok Code Fast 1

Comparing GLM-5.3 and Grok Code Fast 1 across benchmarks, pricing, and capabilities.

Zhipu AI · xAI · Updated for 2026

Which is better?

GLM-5.3 and Grok Code Fast 1 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, Grok Code Fast 1 is roughly 4.1x 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 GLM-5.3

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

Choose Grok Code Fast 1

  • cost matters — it's about 4.1x cheaper per token

At a glance

The differences that matter most.

GLM-5.3
Zhipu AI
Grok Code Fast 1
xAI
Benchmark wins
—
—
Input price
$1.40 / M
$0.20 / M
Output price
$4.40 / M
$1.50 / M
Context window
1,000,000
256,000
Released
Aug 2026
Aug 2025
License
Unknown
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GLM-5.3 and Grok Code Fast 1don'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

Grok Code Fast 1 costs less

For input processing, GLM-5.3 ($1.40/1M tokens) is 7.0x more expensive than Grok Code Fast 1 ($0.20/1M tokens).

For output processing, GLM-5.3 ($4.40/1M tokens) is 2.9x more expensive than Grok Code Fast 1 ($1.50/1M tokens).

In conclusion, GLM-5.3 is more expensive than Grok Code Fast 1.*

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

Lowest available price from all providers
Mon Aug 24 2026 • llm-stats.com
Zhipu AI
GLM-5.3
Input tokens$1.40
Output tokens$4.40
Best providerUnknown Organization
xAI
Grok Code Fast 1
Input tokens$0.20
Output tokens$1.50
Best providerxAI
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 Grok Code Fast 1's 256,000 tokens. GLM-5.3 can generate longer responses up to 128,000 tokens, while Grok Code Fast 1 is limited to 10,000 tokens.

Zhipu AI
GLM-5.3
Input1,000,000 tokens
Output128,000 tokens
xAI
Grok Code Fast 1
Input256,000 tokens
Output10,000 tokens
Mon Aug 24 2026 • llm-stats.com

Release Timeline

When each model was launched

GLM-5.3 was released on 2026-08-14, while Grok Code Fast 1 was released on 2025-08-28.

GLM-5.3 is 12 months newer than Grok Code Fast 1.

GLM-5.3

Aug 14, 2026

1 weeks ago

11mo newer
Grok Code Fast 1

Aug 28, 2025

12 months ago

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

GLM-5.3 is available from ZAI. Grok Code Fast 1 is available from xAI.

GLM-5.3

z logo
Unknown Organization
Input Price:Input: $1.40/1MOutput Price:Output: $4.40/1M

Grok Code Fast 1

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $1.50/1M
* 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 GLM-5.3 and Grok Code Fast 1 side-by-side, then vote on the output you prefer.

GLM-5.3
✓ Preferred
Grok Code Fast 1
Open in Playground

FAQ

Common questions about GLM-5.3 vs Grok Code Fast 1.

Which is better, GLM-5.3 or Grok Code Fast 1?

GLM-5.3 (Zhipu AI) and Grok Code Fast 1 (xAI) 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-5.3 compare to Grok Code Fast 1 in benchmarks?

GLM-5.3 scores Terminal-Bench 2.1: 88.2%, CyberGym: 84.5%, FrontierSWE: 78.1%, Toolathlon: 73.0%, DeepSWE 1.1: 66.9%. Grok Code Fast 1 scores SWE-Bench Verified: 70.8%.

Is GLM-5.3 cheaper than Grok Code Fast 1?

Grok Code Fast 1 is 7.0x cheaper for input tokens. GLM-5.3 costs $1.40/M input and $4.40/M output via z. Grok Code Fast 1 costs $0.20/M input and $1.50/M output via xai.

What are the context window sizes for GLM-5.3 and Grok Code Fast 1?

GLM-5.3 supports 1.0M tokens and Grok Code Fast 1 supports 256K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GLM-5.3 and Grok Code Fast 1?

Key differences include context window (1.0M vs 256K), input pricing ($1.40 vs $0.20/M), licensing (Unknown vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes GLM-5.3 and Grok Code Fast 1?

GLM-5.3 is developed by Zhipu AI and Grok Code Fast 1 is developed by xAI.

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