Gemini 3 Flash Preview is $1.5 cheaper per 1M input tokens (75% lower; 4x difference).
API cost decision in 10 seconds
🔥Gemini 3 Flash Preview vs Grok 4.20 Multi-Agent
Pick Gemini 3 Flash Preview for lower cost; pick Grok 4.20 Multi-Agent only if the larger context window matters more.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Gemini 3 Flash Preview for lower cost; pick Grok 4.20 Multi-Agent only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Gemini 3 Flash Preview is estimated at $2 vs $5 for Grok 4.20 Multi-Agent, saving $3 (60% lower).
Cost-first pickGemini 3 Flash Preview
Context-first pickGrok 4.20 Multi-Agent
Sample savings$360%
10x traffic gap$30
Grok 4.20 Multi-Agent has more context, but Gemini 3 Flash Preview saves $3 on the standard workload. At 10x that traffic, the same price gap is about $30. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Gemini 3 Flash Preview stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Gemini 3 Flash Preview | Grok 4.20 Multi-Agent |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Gemini 3 Flash Preview | $4 | $13 |
| Balanced workload | 1M input + 1M output | Gemini 3 Flash Preview | $3.5 | $8 |
| Output-heavy chatbot | 1M input + 5M output | Gemini 3 Flash Preview | $15.5 | $32 |
Gemini 3 Flash Preview is $3 cheaper per 1M output tokens (50% lower; 2x difference).
Grok 4.20 Multi-Agent has 951.42K more context (1.91x larger).
Gemini 3 Flash Preview is $3 cheaper on the standard workload (60% 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
Gemini 3 Flash Preview has the lower input price; Gemini 3 Flash Preview has the lower output price; Grok 4.20 Multi-Agent offers the larger context window. For the 1M input plus 500K output sample, Gemini 3 Flash Preview is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $2 for Gemini 3 Flash Preview and $5 for Grok 4.20 Multi-Agent.
Choose Gemini 3 Flash Preview when you care most about lower input-token price, and lower output-token price.
Choose Grok 4.20 Multi-Agent when you care most about larger context window.
- On the standard 1M input plus 500K output workload, Gemini 3 Flash Preview is estimated at $2 vs $5 for Grok 4.20 Multi-Agent, saving $3 (60% lower).
- Gemini 3 Flash Preview is $3 cheaper on the standard workload (60% lower).
- Gemini 3 Flash Preview is $1.5 cheaper per 1M input tokens (75% lower; 4x difference).
- Gemini 3 Flash Preview is $3 cheaper per 1M output tokens (50% lower; 2x difference).
- Grok 4.20 Multi-Agent has 951.42K more context (1.91x larger).
| Feature | 🔥Gemini 3 Flash Preview (Google) | Grok 4.20 Multi-Agent (xAI) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.5 | $2 |
| Completion Price per 1M tokens | $3 | $6 |
| Sample Workload Cost 1M input + 500K output | $2 | $5 |
| Context Window | 1.05M | 2M |
| Release Date | ||
| Popularity | #7 |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Gemini 3 Flash Preview | On the standard 1M input plus 500K output workload, Gemini 3 Flash Preview is estimated at $2 vs $5 for Grok 4.20 Multi-Agent, saving $3 (60% lower). |
| High-volume input processing | Gemini 3 Flash Preview | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Gemini 3 Flash Preview | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Grok 4.20 Multi-Agent | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Gemma 4 26B A4B (free) can replace Gemini 3 Flash Preview when lower sample workload cost matters most: $0.
- Gemma 4 31B (free) can replace Gemini 3 Flash Preview when lower sample workload cost matters most: $0.
- Lyria 3 Pro Preview can replace Gemini 3 Flash Preview when lower sample workload cost matters most: $0.
- Lyria 3 Clip Preview can replace Gemini 3 Flash Preview when lower sample workload cost matters most: $0.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- DeepSeek V4 Flash · DeepSeek · #1
- Hy3 preview · Tencent · #2
- Claude Opus 4.7 · Anthropic · #3
- Claude Sonnet 4.6 · Anthropic · #4
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Open xAI modelsGemini 3 Flash Preview is a high speed, high value thinking model designed for agentic workflows, multi turn chat, and coding assistance. It delivers near Pro level reasoning and tool...
Grok 4.20 Multi-Agent is a variant of xAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information...