Grok Build 0.1 is $0.25 cheaper per 1M input tokens (20% lower; 1.25x difference).
API cost decision in 10 seconds
NewGrok Build 0.1 vs Cogito v2.1 671B
Pick Cogito v2.1 671B for lower cost; pick Grok Build 0.1 only if the larger context window matters more.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Cogito v2.1 671B 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, Cogito v2.1 671B is estimated at $1.88 vs $2 for Grok Build 0.1, saving $0.12 (6.2% lower).
Cost-first pickCogito v2.1 671B
Context-first pickGrok Build 0.1
Sample savings$0.126.2%
10x traffic gap$1.25
Grok Build 0.1 has more context, but Cogito v2.1 671B saves $0.12 on the standard workload. At 10x that traffic, the same price gap is about $1.25. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Cost winner changes by workload shape: input-heavy / RAG favors Grok Build 0.1, balanced workload favors Cogito v2.1 671B, and output-heavy chatbot favors Cogito v2.1 671B.
| Workload shape | Token mix | Better pick | Grok Build 0.1 | Cogito v2.1 671B |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Grok Build 0.1 | $6 | $6.88 |
| Balanced workload | 1M input + 1M output | Cogito v2.1 671B | $3 | $2.5 |
| Output-heavy chatbot | 1M input + 5M output | Cogito v2.1 671B | $11 | $7.5 |
Cogito v2.1 671B is $0.75 cheaper per 1M output tokens (37.5% lower; 1.6x difference).
Grok Build 0.1 has 128K more context (2x larger).
Cogito v2.1 671B is $0.12 cheaper on the standard workload (6.2% lower).
Estimate your workload cost
Your Workload Cost
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
Grok Build 0.1 has the lower input price; Cogito v2.1 671B has the lower output price; Grok Build 0.1 offers the larger context window. For the 1M input plus 500K output sample, Cogito v2.1 671B 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 $1.88 for Cogito v2.1 671B.
Choose Grok Build 0.1 when you care most about lower input-token price, and larger context window.
Choose Cogito v2.1 671B when you care most about lower output-token price.
- On the standard 1M input plus 500K output workload, Cogito v2.1 671B is estimated at $1.88 vs $2 for Grok Build 0.1, saving $0.12 (6.2% lower).
- Cogito v2.1 671B is $0.12 cheaper on the standard workload (6.2% lower).
- Grok Build 0.1 is $0.25 cheaper per 1M input tokens (20% lower; 1.25x difference).
- Cogito v2.1 671B is $0.75 cheaper per 1M output tokens (37.5% lower; 1.6x difference).
- Grok Build 0.1 has 128K more context (2x larger).
| Feature | NewGrok Build 0.1 (xAI) | Cogito v2.1 671B (Deep Cogito) |
|---|---|---|
| Input Price prompt tokens per 1M | $1 | $1.25 |
| Completion Price per 1M tokens | $2 | $1.25 |
| Sample Workload Cost 1M input + 500K output | $2 | $1.88 |
| Context Window | 256K | 128K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Cogito v2.1 671B | On the standard 1M input plus 500K output workload, Cogito v2.1 671B is estimated at $1.88 vs $2 for Grok Build 0.1, saving $0.12 (6.2% lower). |
| High-volume input processing | Grok Build 0.1 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Cogito v2.1 671B | 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
- No lower-cost same-provider swap is currently tracked for this pair.
- 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.
- DeepSeek V4 Flash offers 1.05M context with $0.2 sample workload cost.
- DeepSeek V4 Flash · DeepSeek · #1
- Hy3 preview · Tencent · #2
- Claude Opus 4.7 · Anthropic · #3
- Claude Sonnet 4.6 · Anthropic · #4
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
Find models with larger context windows for RAG, long documents, and codebase review.
Open largest context modelsProvider catalogs
Compare models within provider hubs before choosing a final API vendor.
Open provider hubsxAI catalog
Review all tracked xAI models before deciding whether this matchup is the right shortlist.
Open xAI modelsDeep Cogito catalog
Check other Deep Cogito models with comparable pricing, context, or release timing.
Open Deep Cogito modelsGrok 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...
Cogito v2.1 671B MoE represents one of the strongest open models globally, matching performance of frontier closed and open models. This model is trained using self play with reinforcement learning...