Cost per coding-agent request

Is GLM 5.3 or GPT-6 Sol cheaper for coding agents?

For coding agents, GPT-6 Sol costs 1.4x as much as GLM 5.3 per request ($0.083 vs $0.057 on our measured traffic), because GPT-6 Sol lists at $2 input, $0.20 cached input and $10 output per million tokens against $1.40, $0.26 and $4.40 for GLM 5.3, and GPT-6 Sol charges more for prompts over 272K tokens.

List prices: Z.AI pricing, OpenAI API pricing, checked 2026-10-13. Request costs: Standard Compute gateway data, 79,301 coding-agent requests from 75 users, Sep 13 to Oct 12, 2026. How we compute this

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Cost per coding-agent request, side by side

Cost at list price	GLM 5.3	GPT-6 Sol
Prompt under 100K tokens50% of requests, 87% of input cached	$0.026	$0.031
Prompt of 100K to 272K39% of requests, 88% of input cached	$0.070	$0.078
Prompt over 272K tokens11% of requests, 86% of input cached	$0.16	$0.34
Average request	$0.057	$0.083
100 requests	$5.72	$8.25
Median session16 requests; a session ends after 10 idle minutes	$0.71	$0.90
A month of regular usemedian of 20 users active on 5+ days	$92.16	$117

Each logged request priced at the vendor’s list rates for its own token counts, including cache reads and any higher rate for long prompts. Average output: 698 tokens per request.

Benchmarks, speed and latency, side by side

Artificial Analysis	GLM 5.3	GPT-6 Sol
Intelligence Index10 evaluations, 0 to 100	45	48
Terminal-Bench 4.0agentic coding in a terminal	41.9%	43.9%
Output speedmedian	69 tokens/s	123 tokens/s
Time to first answer tokenincludes thinking time	32 s	2.5 min

Source: Artificial Analysis (artificialanalysis.ai). Measured variants: GLM-5.3 (Max), speed on Z AI; GPT-6 Sol (Max), speed on OpenAI. Fetched October 13, 2026. Artificial Analysis runs Terminal-Bench 4.0 in its own setup, so its scores differ from the tbench.ai leaderboard.

What to watch for

The gap widens on long prompts: under 100K tokens GPT-6 Sol costs 1.2x as much per request, over 272K 2.2x. GPT-6 Sol is superseded: GPT-6.1 Sol costs $0.067 per request. GLM 5.3 scores close to it on the benchmarks above, so the cheaper request is not bought with much lower ability.

FAQ

Is GLM 5.3 cheaper than GPT-6 Sol for coding agents?

Yes, at list prices. 100 average coding-agent requests cost $5.72 on GLM 5.3 and $8.25 on GPT-6 Sol. A median 16-request session costs $0.71 vs $0.90. Measured on 79,301 real coding-agent requests (Sep 13 to Oct 12, 2026).

How much does a month of GPT-6 Sol vs GLM 5.3 cost?

For the median regular user in our data (1,478 requests in 30 days), about $117 on GPT-6 Sol and $92.16 on GLM 5.3 at list price. Heavier users pay proportionally more.

GLM 5.3 vs GPT-6 Sol: which is better for agents?

GPT-6 Sol scores higher on output quality (8.7/10 vs 8.4/10), while GLM 5.3 is the cheaper option. GLM 5.3 is best for coding agents that need open weights and strong agentic scores; GPT-6 Sol is best for existing GPT-6 Sol setups and calls that need no-reasoning mode. Live community votes on this page show what people actually prefer.

Can I switch between GLM 5.3 and GPT-6 Sol in the same agent?

Yes. Model-agnostic agents (Cline, Aider, OpenClaw, Hermes Agent, Kilo Code, OpenCode, Continue) let you swap models per task. Many people route hard tasks to the stronger model and routine work to the cheaper one.