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GPT-4o vs Grok 3: Pricing, Benchmarks & Verdict (2026)

Verdict

GPT-4o is significantly cheaper at $2.50/$10.00 per million tokens vs $3.00/$15.00. Grok 3 is stronger for coding with a coding ELO of 1290 vs 1265. Grok 3 ranks higher overall with an Arena ELO of 1300 vs 1260.

Side-by-Side Comparison

FeatureGPT-4oGrok 3
ProviderOpenAIxAI
Input Price / 1M tokens$2.50$3.00
Output Price / 1M tokens$10.00$15.00
Context Window128K128K
Max Output Tokens16,38416,384
Arena ELO1,2601,300
Coding ELO1,2651,290
TTFT (ms)230300
Tokens/sec9580
MultimodalYesYes
JSON ModeYesYes
Function CallingYesYes
VisionYesYes
When to Use GPT-4o

Choose GPT-4o when you need: fast response times, strong multimodal capabilities, code execution support. It excels at general-purpose, multimodal, function-calling tasks. It is also the more cost-effective option between the two.

Strengths:

  • Fast response times
  • Strong multimodal capabilities
  • Code execution support

Best for:

general-purposemultimodalfunction-calling
When to Use Grok 3

Choose Grok 3 when you need: strong benchmark performance, good reasoning capabilities, vision and multimodal support, fast for its capability tier. It excels at general-purpose, reasoning, coding tasks.

Strengths:

  • Strong benchmark performance
  • Good reasoning capabilities
  • Vision and multimodal support
  • Fast for its capability tier

Best for:

general-purposereasoningcoding

Frequently Asked Questions

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