API cost decision in 10 seconds

GLM 5.1 vs INTELLECT-3

Pick INTELLECT-3 for lower cost; pick GLM 5.1 only if the larger context window matters more.

Pricing data updated: 2026-05-26T11:08:00Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick INTELLECT-3 for lower cost; pick GLM 5.1 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, INTELLECT-3 is estimated at $0.75 vs $2.52 for GLM 5.1, saving $1.77 (70.2% lower).

Cost-first pickINTELLECT-3

Context-first pickGLM 5.1

Sample savings$1.7770.2%

10x traffic gap$17.7

GLM 5.1 has more context, but INTELLECT-3 saves $1.77 on the standard workload. At 10x that traffic, the same price gap is about $17.7. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

INTELLECT-3 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	GLM 5.1	INTELLECT-3
Input-heavy / RAG	5M input + 500K output	INTELLECT-3	$6.44	$1.55
Balanced workload	1M input + 1M output	INTELLECT-3	$4.06	$1.3
Output-heavy chatbot	1M input + 5M output	INTELLECT-3	$16.38	$5.7

Cheaper input INTELLECT-3 $0.98 vs $0.2 / 1M

INTELLECT-3 is $0.78 cheaper per 1M input tokens (79.6% lower; 4.9x difference).

Cheaper output INTELLECT-3 $3.08 vs $1.1 / 1M

INTELLECT-3 is $1.98 cheaper per 1M output tokens (64.3% lower; 2.8x difference).

Larger context GLM 5.1 202.75K vs 131.07K

GLM 5.1 has 71.68K more context (1.55x larger).

Sample workload INTELLECT-3 $2.52 vs $0.75

INTELLECT-3 is $1.77 cheaper on the standard workload (70.2% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GLM 5.1 Calculating… Estimated API cost

INTELLECT-3 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

INTELLECT-3 has the lower input price; INTELLECT-3 has the lower output price; GLM 5.1 offers the larger context window. For the 1M input plus 500K output sample, INTELLECT-3 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $2.52 for GLM 5.1 and $0.75 for INTELLECT-3.

Best Fit

Choose GLM 5.1 when you care most about larger context window.

Choose INTELLECT-3 when you care most about lower input-token price, and lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, INTELLECT-3 is estimated at $0.75 vs $2.52 for GLM 5.1, saving $1.77 (70.2% lower).
INTELLECT-3 is $1.77 cheaper on the standard workload (70.2% lower).
INTELLECT-3 is $0.78 cheaper per 1M input tokens (79.6% lower; 4.9x difference).
INTELLECT-3 is $1.98 cheaper per 1M output tokens (64.3% lower; 2.8x difference).
GLM 5.1 has 71.68K more context (1.55x larger).

Head-to-Head Specs

Feature	GLM 5.1 (Z.ai)	INTELLECT-3 (Prime Intellect)
Input Price prompt tokens per 1M	$0.98	$0.2
Completion Price per 1M tokens	$3.08	$1.1
Sample Workload Cost 1M input + 500K output	$2.52	$0.75
Context Window	202.75K	131.07K
Release Date	2026-04-07	2025-11-27

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	INTELLECT-3	On the standard 1M input plus 500K output workload, INTELLECT-3 is estimated at $0.75 vs $2.52 for GLM 5.1, saving $1.77 (70.2% lower).
High-volume input processing	INTELLECT-3	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	INTELLECT-3	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	GLM 5.1	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

GLM 4.5 Air (free) can replace GLM 5.1 when lower sample workload cost matters most: $0.
GLM 4 32B can replace GLM 5.1 when lower sample workload cost matters most: $0.15.
GLM 4.7 Flash can replace GLM 5.1 when lower sample workload cost matters most: $0.26.
GLM 4.5 Air can replace GLM 5.1 when lower sample workload cost matters most: $0.55.

Larger context near this budget

Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Grok 4.20 offers 2M context with $2.5 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.
Gemini 3.1 Flash Lite offers 1.05M context with $1 sample workload cost.

Popular competitors

No popular competitor is currently available.

Cheaper alternatives

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Larger context alternatives

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

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Provider catalogs

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

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Z.ai catalog

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

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Prime Intellect catalog

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

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GLM 5.1

GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on...

INTELLECT-3

INTELLECT-3 is a 106B-parameter Mixture-of-Experts model (12B active) post-trained from GLM-4.5-Air-Base using supervised fine-tuning (SFT) followed by large-scale reinforcement learning (RL). It offers state-of-the-art performance for its size across math,...