GLM 5.3 vs GLM 5.2

Output tokens cost $3.55 per million on GLM 5.3 and $3.94 per million on GLM 5.2. Input tokens cost $1.01 per million on GLM 5.3 and $1.13 per million on GLM 5.2. Cached input tokens are billed at $0.25 per million on GLM 5.3 and $0.28 per million on GLM 5.2. Discounted rates are shown where a promotion is active. Context lengths are 1,000,000 tokens on GLM 5.3 and 1,000,000 tokens on GLM 5.2. Time to first token (TTFT) measured on AIHubMix is 4.6s on GLM 5.3 and 1.2s on GLM 5.2. Measured output throughput is 448.1 tok/s on GLM 5.3 and 41.9 tok/s on GLM 5.2.

GLM 5.3

GLM 5.2

+ Add model · 2/4

up to 10% off·00:00–23:59 UTC

GLM 5.3

Z.AI · text → text

GLM-5.3 is Z.AI’s coding and agentic reasoning model, built for complex software engineering, long-running agent tasks, vulnerability analysis, and other demanding workloads. Building on GLM-5.2, it incorporates further post-training improvements to deliver stronger coding performance, better task execution, and greater token efficiency. We currently offer the production-ready GLM-5.3 API with unlimited concurrency, making it well suited for high-throughput workloads, coding agents, and large-scale automation. For a limited time, GLM-5.3 is available at 10% off.

Input$1.13$1.01 /M

Output$3.94$3.55 /M

Details

GLM 5.2

Z.AI · text → text

GLM-5.2 is Z.ai’s flagship model for the era of long-horizon tasks. With a truly usable 1M-token context window, it can handle project-level engineering context, execute long-running tasks more reliably, follow engineering standards more consistently, and complete the full development workflow from requirements to multi-platform deployment in a single task.

Input$1.13 /M

Output$3.94 /M

Details

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

GLM 5.3

GLM 5.2

Input /M

$1.13$1.01−10%

$1.13

Output /M

$3.94$3.55−10%

$3.94

Cache read /M

$0.28$0.25−10%

$0.28

Context length

1,000,000

Max output

128,000

Time to First Token

4.6 s

1.2 s

Throughput

448.1 tok/s

41.9 tok/s

Modalities

text

Supported Parameters

thinkingtoolsfunction callingstructured outputs

API Formats

chat_completions · claude_api

Released

June 16, 2026

Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

glm-5.3glm-5.2

Tokens / day

Requests / day

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

glm-5.3glm-5.2

Throughput (tok/s)

TTFT (s)

Uptime (%)

Cost calculator

Estimate your monthly bill for the same workload on each model.

Requests / day

Avg input tokens / request

Avg output tokens / request

GLM 5.3

$127$114 /mo

GLM 5.2

$127 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: GLM 5.3, GLM 5.2?

GLM 5.3: $3.55/M output tokens; GLM 5.2: $3.94/M. Use the cost calculator above to estimate your own workload.

Which responds faster?

GLM 5.2: 1.2s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

How large is each context window?

GLM 5.3 accepts 1,000,000 and GLM 5.2 accepts 1,000,000 input tokens. Maximum output per request is 128,000 tokens on GLM 5.3 and 128,000 tokens on GLM 5.2.

Which one generates tokens faster?

GLM 5.3 at 448.1 tok/s and GLM 5.2 at 41.9 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

GLM 5.3 accepts text input and supports thinking, tool calling, function calling and structured outputs; GLM 5.2 accepts text input and supports thinking, tool calling, function calling and structured outputs.

Can I call GLM 5.3 and GLM 5.2 with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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GLM 5.3 vs GLM 5.2

Pricing & Specifications

Activity Past 30 Days

Tokens / day

Requests / day

Performance Past 3 Days

Throughput (tok/s)

TTFT (s)

Uptime (%)

Cost calculator

FAQ

Popular comparisons

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