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GLM 4.6 vs GPT 5.6 Luna

Compare GLM 4.6 from Z.AI and GPT 5.6 Luna from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

Z.AIGLM 4.6OpenAIGPT 5.6 Luna
+ Add model · 2/4
Z.AI logo
GLM 4.6
Z.AI · text → text

GLM-4.6 is Zhipu’s latest flagship model (total parameters 355B, activation parameters 32B), comprehensively surpassing GLM-4.5. Its coding capability is aligned with Claude Sonnet 4, making it a top domestic coding model; the context window has been expanded from 128K to 200K, better suited for long code and agent tasks; inference capabilities have been significantly enhanced and support tool invocation during processing; improvements have been made in tool calling, search agents, writing style, role play, and multilingual translation. The model is named glm-4.6 and is provided by three vendors, with calls prioritized to the Sophnet platform.

Input$0.274 /M
Output$1.0959 /M
Cache read$0.0548 /M
Details
OpenAI logo
GPT 5.6 Luna
OpenAI · text, image → text

GPT-5.6 Luna is designed for cost-sensitive, high-volume workloads. It roughly corresponds to the nano model tier used in earlier GPT-5 families.

Input$0.2 /M
Output$1.2 /M
Cache read$0.02 /M
Details

Pricing & Specifications

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

GLM 4.6
GPT 5.6 Luna
Input /M
$0.274
$0.2
Output /M
$1.0959
$1.2
Cache read /M
$0.0548
$0.02
Context length
200,000
1,050,000
Max output
131,072
128,000
Time to First Token
1.7 s
5.0 s
Throughput
34.4 tok/s
47.6 tok/s
Modalities
text
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputs
toolsthinkingstructured outputs
API Formats
chat_completions · responses
Released
September 30, 2025
July 9, 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-4.6gpt-5.6-luna

Tokens / day

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Requests / day

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Performance Past 3 Days

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

glm-4.6gpt-5.6-luna

Throughput (tok/s)

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TTFT (s)

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Uptime (%)

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Cost calculator

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

GPT 5.6 Luna
$30.00 /mo
GLM 4.6
$32.88 /mo

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

FAQ

Which is cheaper: GLM 4.6, GPT 5.6 Luna?

GLM 4.6: $1.0959/M output tokens; GPT 5.6 Luna: $1.2/M. Use the cost calculator above to estimate your own workload.

Which responds faster?

GLM 4.6: 1.7s 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 4.6 accepts 200,000 and GPT 5.6 Luna accepts 1,050,000 input tokens. Maximum output per request is 131,072 tokens on GLM 4.6 and 128,000 tokens on GPT 5.6 Luna.

Which one generates tokens faster?

GPT 5.6 Luna at 47.6 tok/s and GLM 4.6 at 34.4 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 4.6 accepts text input and supports thinking, tool calling, function calling and structured outputs; GPT 5.6 Luna accepts text and image input and supports tool calling, thinking and structured outputs.

Can I call GLM 4.6 and GPT 5.6 Luna 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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