API cost decision in 10 seconds

NewGLM 5.3 vs Grok Latest

Pick GLM 5.3 when budget and context both matter.

Page updated: 2026-08-18T21:08:14Z Data confirmed: 2026-08-23T13:07:49Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick GLM 5.3 when budget and context both matter.

On the standard 1M input plus 500K output workload, GLM 5.3 is estimated at $3.6 vs $5 for Grok Latest, saving $1.4 (28% lower).

Cost-first pickGLM 5.3

Context-first pickGLM 5.3

Sample savings$1.428%

10x traffic gap$14

GLM 5.3 is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $14. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

GLM 5.3 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	GLM 5.3	Grok Latest
Input-heavy / RAG	5M input + 500K output	GLM 5.3	$9.2	$13
Balanced workload	1M input + 1M output	GLM 5.3	$5.8	$8
Output-heavy chatbot	1M input + 5M output	GLM 5.3	$23.4	$32

Cheaper input GLM 5.3 $1.4 vs $2 / 1M

GLM 5.3 is $0.6 cheaper per 1M input tokens (30% lower; 1.43x difference).

Cheaper output GLM 5.3 $4.4 vs $6 / 1M

GLM 5.3 is $1.6 cheaper per 1M output tokens (26.7% lower; 1.36x difference).

Larger context GLM 5.3 1.05M vs 500K

GLM 5.3 has 548.58K more context (2.1x larger).

Sample workload GLM 5.3 $3.6 vs $5

GLM 5.3 is $1.4 cheaper on the standard workload (28% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GLM 5.3 Calculating… Estimated API cost

Grok Latest Calculating… Estimated API cost

Cheaper for this workload Calculating… Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

GLM 5.3 has the lower input price; GLM 5.3 has the lower output price; GLM 5.3 offers the larger context window. For the 1M input plus 500K output sample, GLM 5.3 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $3.6 for GLM 5.3 and $5 for Grok Latest.

Best Fit

Choose GLM 5.3 when you care most about lower input-token price, lower output-token price, and larger context window.

Choose Grok Latest when its provider, model quality, latency, or availability is more important than the numeric price/context winner.

Decision Notes

On the standard 1M input plus 500K output workload, GLM 5.3 is estimated at $3.6 vs $5 for Grok Latest, saving $1.4 (28% lower).
GLM 5.3 is $1.4 cheaper on the standard workload (28% lower).
GLM 5.3 is $0.6 cheaper per 1M input tokens (30% lower; 1.43x difference).
GLM 5.3 is $1.6 cheaper per 1M output tokens (26.7% lower; 1.36x difference).
GLM 5.3 has 548.58K more context (2.1x larger).

Head-to-Head Specs

Feature	NewGLM 5.3 (Z.ai)	Grok Latest (xAI)
Input Price prompt tokens per 1M	$1.4	$2
Completion Price per 1M tokens	$4.4	$6
Sample Workload Cost 1M input + 500K output	$3.6	$5
Context Window	1.05M	500K
Release Date	2026-08-18	2026-07-08

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	GLM 5.3	On the standard 1M input plus 500K output workload, GLM 5.3 is estimated at $3.6 vs $5 for Grok Latest, saving $1.4 (28% lower).
High-volume input processing	GLM 5.3	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	GLM 5.3	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	GLM 5.3	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

GLM 5.2 (free) can replace GLM 5.3 when lower sample workload cost matters most: $0.
GLM 4.5 Air (free) can replace GLM 5.3 when lower sample workload cost matters most: $0.
GLM 4 32B can replace GLM 5.3 when lower sample workload cost matters most: $0.15.
GLM 4.7 Flash can replace GLM 5.3 when lower sample workload cost matters most: $0.26.

Larger context near this budget

Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
Grok 4.20 offers 2M context with $2.5 sample workload cost.
DeepSeek V4 Flash 0731 offers 1.31M context with $0.17 sample workload cost.
DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.

Popular competitors

DeepSeek V4 Flash 0731 · DeepSeek · #1
MiMo-V2.5 · Xiaomi · #2
Hy3 · Tencent · #3
Ox Alpha · stealth · #4

Cheaper alternatives

Review low-cost models sorted by a standard 1M input plus 500K output workload.

Open cheapest models

Larger context alternatives

Find models with larger context windows for RAG, long documents, and codebase review.

Open largest context models

Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

Open provider hubs

Z.ai catalog

Review all tracked Z.ai models before deciding whether this matchup is the right shortlist.

Open Z.ai models

xAI catalog

Check other xAI models with comparable pricing, context, or release timing.

Open xAI models

GLM 5.3

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...

Grok Latest

This model always redirects to the latest Grok model from xAI.