API cost decision in 10 seconds

Grok 4.20 Multi-Agent vs Gemini 3 Flash Preview

Pick Gemini 3 Flash Preview for lower cost; pick Grok 4.20 Multi-Agent only if the larger context window matters more.

Pricing data updated:  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

Same prices, different token mixes.

Gemini 3 Flash Preview stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickGrok 4.20 Multi-AgentGemini 3 Flash Preview
Input-heavy / RAG5M input + 500K outputGemini 3 Flash Preview$13$4
Balanced workload1M input + 1M outputGemini 3 Flash Preview$8$3.5
Output-heavy chatbot1M input + 5M outputGemini 3 Flash Preview$32$15.5
Cheaper input Gemini 3 Flash Preview $2 vs $0.5 / 1M

Gemini 3 Flash Preview is $1.5 cheaper per 1M input tokens (75% lower; 4x difference).

Cheaper output Gemini 3 Flash Preview $6 vs $3 / 1M

Gemini 3 Flash Preview is $3 cheaper per 1M output tokens (50% lower; 2x difference).

Larger context Grok 4.20 Multi-Agent 2M vs 1.05M

Grok 4.20 Multi-Agent has 951.42K more context (1.91x larger).

Sample workload Gemini 3 Flash Preview $5 vs $2

Gemini 3 Flash Preview is $3 cheaper on the standard workload (60% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Grok 4.20 Multi-Agent Calculating… Estimated API cost
Gemini 3 Flash Preview 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

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 $5 for Grok 4.20 Multi-Agent and $2 for Gemini 3 Flash Preview.

Best Fit

Choose Grok 4.20 Multi-Agent when you care most about larger context window.

Choose Gemini 3 Flash Preview 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, 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).
Head-to-Head Specs
FeatureGrok 4.20 Multi-Agent
(xAI)		Gemini 3 Flash Preview
(Google)
Input Price
prompt tokens per 1M		$2$0.5
Completion Price
per 1M tokens		$6$3
Sample Workload Cost
1M input + 500K output		$5$2
Context Window2M1.05M
Release Date

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionGemini 3 Flash PreviewOn 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 processingGemini 3 Flash PreviewLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsGemini 3 Flash PreviewLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workGrok 4.20 Multi-AgentA larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps
  • Grok Build 0.1 can replace Grok 4.20 Multi-Agent when lower sample workload cost matters most: $2.
  • Grok 4.3 can replace Grok 4.20 Multi-Agent when lower sample workload cost matters most: $2.5.
  • Grok 4.20 can replace Grok 4.20 Multi-Agent when lower sample workload cost matters most: $2.5.
  • Gemma 4 26B A4B (free) can replace Gemini 3 Flash Preview when lower sample workload cost matters most: $0.
Larger context near this budget
  • Llama 4 Scout offers 10M context with $0.23 sample workload cost.
Popular competitors
  • No popular competitor is currently available.

Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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xAI catalog

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Google catalog

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Grok 4.20 Multi-Agent

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...

Gemini 3 Flash Preview

Gemini 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...