API cost decision in 10 seconds

Aion-2.0 vs GLM 5

Pick GLM 5 when budget and context both matter.

Page updated: 2026-05-26T10:03:26Z Data confirmed: 2026-05-26T12:43:06Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick GLM 5 when budget and context both matter.

On the standard 1M input plus 500K output workload, GLM 5 is estimated at $1.56 vs $1.6 for Aion-2.0, saving $0.04 (2.5% lower).

Cost-first pickGLM 5

Context-first pickGLM 5

Sample savings$0.042.5%

10x traffic gap$0.4

GLM 5 is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $0.4. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Cost winner changes by workload shape: input-heavy / RAG favors GLM 5, balanced workload favors Aion-2.0, and output-heavy chatbot favors Aion-2.0.

Workload shape	Token mix	Better pick	Aion-2.0	GLM 5
Input-heavy / RAG	5M input + 500K output	GLM 5	$4.8	$3.96
Balanced workload	1M input + 1M output	Aion-2.0	$2.4	$2.52
Output-heavy chatbot	1M input + 5M output	Aion-2.0	$8.8	$10.2

Cheaper input GLM 5 $0.8 vs $0.6 / 1M

GLM 5 is $0.2 cheaper per 1M input tokens (25% lower; 1.33x difference).

Cheaper output Aion-2.0 $1.6 vs $1.92 / 1M

Aion-2.0 is $0.32 cheaper per 1M output tokens (16.7% lower; 1.2x difference).

Larger context GLM 5 131.07K vs 202.75K

GLM 5 has 71.68K more context (1.55x larger).

Sample workload GLM 5 $1.6 vs $1.56

GLM 5 is $0.04 cheaper on the standard workload (2.5% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Aion-2.0 Calculating… Estimated API cost

GLM 5 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 has the lower input price; Aion-2.0 has the lower output price; GLM 5 offers the larger context window. For the 1M input plus 500K output sample, GLM 5 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $1.6 for Aion-2.0 and $1.56 for GLM 5.

Best Fit

Choose Aion-2.0 when you care most about lower output-token price.

Choose GLM 5 when you care most about lower input-token price, and larger context window.

Decision Notes

On the standard 1M input plus 500K output workload, GLM 5 is estimated at $1.56 vs $1.6 for Aion-2.0, saving $0.04 (2.5% lower).
GLM 5 is $0.04 cheaper on the standard workload (2.5% lower).
GLM 5 is $0.2 cheaper per 1M input tokens (25% lower; 1.33x difference).
Aion-2.0 is $0.32 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
GLM 5 has 71.68K more context (1.55x larger).

Head-to-Head Specs

Feature	Aion-2.0 (AionLabs)	GLM 5 (Z.ai)
Input Price prompt tokens per 1M	$0.8	$0.6
Completion Price per 1M tokens	$1.6	$1.92
Sample Workload Cost 1M input + 500K output	$1.6	$1.56
Context Window	131.07K	202.75K
Release Date	2026-02-23	2026-02-11

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	GLM 5	On the standard 1M input plus 500K output workload, GLM 5 is estimated at $1.56 vs $1.6 for Aion-2.0, saving $0.04 (2.5% lower).
High-volume input processing	GLM 5	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Aion-2.0	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	GLM 5	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Aion-1.0-Mini can replace Aion-2.0 when lower sample workload cost matters most: $1.4.
GLM 4.5 Air (free) can replace GLM 5 when lower sample workload cost matters most: $0.
GLM 4 32B can replace GLM 5 when lower sample workload cost matters most: $0.15.
GLM 4.7 Flash can replace GLM 5 when lower sample workload cost matters most: $0.26.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.
DeepSeek V4 Flash offers 1.05M context with $0.2 sample workload cost.
DeepSeek V4 Pro offers 1.05M context with $0.87 sample workload cost.

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Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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AionLabs catalog

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Z.ai catalog

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Aion-2.0 is a variant of DeepSeek V3.2 optimized for immersive roleplaying and storytelling. It is particularly strong at introducing tension, crises, and conflict into stories, making narratives feel more engaging....

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