API cost decision in 10 seconds

NewGrok Build 0.1 vs Rnj 1 Instruct

Pick Rnj 1 Instruct for lower cost; pick Grok Build 0.1 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 Rnj 1 Instruct for lower cost; pick Grok Build 0.1 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Rnj 1 Instruct is estimated at $0.22 vs $2 for Grok Build 0.1, saving $1.77 (88.8% lower).

Cost-first pickRnj 1 Instruct

Context-first pickGrok Build 0.1

Sample savings$1.7788.8%

10x traffic gap$17.75

Grok Build 0.1 has more context, but Rnj 1 Instruct saves $1.77 on the standard workload. At 10x that traffic, the same price gap is about $17.75. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Rnj 1 Instruct stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Grok Build 0.1	Rnj 1 Instruct
Input-heavy / RAG	5M input + 500K output	Rnj 1 Instruct	$6	$0.82
Balanced workload	1M input + 1M output	Rnj 1 Instruct	$3	$0.3
Output-heavy chatbot	1M input + 5M output	Rnj 1 Instruct	$11	$0.9

Cheaper input Rnj 1 Instruct $1 vs $0.15 / 1M

Rnj 1 Instruct is $0.85 cheaper per 1M input tokens (85% lower; 6.67x difference).

Cheaper output Rnj 1 Instruct $2 vs $0.15 / 1M

Rnj 1 Instruct is $1.85 cheaper per 1M output tokens (92.5% lower; 13.3x difference).

Larger context Grok Build 0.1 256K vs 32.77K

Grok Build 0.1 has 223.23K more context (7.81x larger).

Sample workload Rnj 1 Instruct $2 vs $0.22

Rnj 1 Instruct is $1.77 cheaper on the standard workload (88.8% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Grok Build 0.1 Calculating… Estimated API cost

Rnj 1 Instruct 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

Rnj 1 Instruct has the lower input price; Rnj 1 Instruct has the lower output price; Grok Build 0.1 offers the larger context window. For the 1M input plus 500K output sample, Rnj 1 Instruct is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $2 for Grok Build 0.1 and $0.22 for Rnj 1 Instruct.

Best Fit

Choose Grok Build 0.1 when you care most about larger context window.

Choose Rnj 1 Instruct 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, Rnj 1 Instruct is estimated at $0.22 vs $2 for Grok Build 0.1, saving $1.77 (88.8% lower).
Rnj 1 Instruct is $1.77 cheaper on the standard workload (88.8% lower).
Rnj 1 Instruct is $0.85 cheaper per 1M input tokens (85% lower; 6.67x difference).
Rnj 1 Instruct is $1.85 cheaper per 1M output tokens (92.5% lower; 13.3x difference).
Grok Build 0.1 has 223.23K more context (7.81x larger).

Head-to-Head Specs

Feature	NewGrok Build 0.1 (xAI)	Rnj 1 Instruct (EssentialAI)
Input Price prompt tokens per 1M	$1	$0.15
Completion Price per 1M tokens	$2	$0.15
Sample Workload Cost 1M input + 500K output	$2	$0.22
Context Window	256K	32.77K
Release Date	2026-05-20	2025-12-07

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Rnj 1 Instruct	On the standard 1M input plus 500K output workload, Rnj 1 Instruct is estimated at $0.22 vs $2 for Grok Build 0.1, saving $1.77 (88.8% lower).
High-volume input processing	Rnj 1 Instruct	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Rnj 1 Instruct	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Grok Build 0.1	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

No lower-cost same-provider swap is currently tracked for this pair.

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

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

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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.

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xAI catalog

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

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EssentialAI catalog

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

Open EssentialAI models

Grok Build 0.1

Grok Build 0.1 is xAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized for interactive coding...

Rnj 1 Instruct

Rnj-1 is an 8B-parameter, dense, open-weight model family developed by Essential AI and trained from scratch with a focus on programming, math, and scientific reasoning. The model demonstrates strong performance...