CtrlAltDebrief

GPT-4o vs Grok 3

API pricing, context window and capabilities for GPT-4o and Grok 3, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.

Verdict

computed from the published numbers

Grok 3 wins on price and on intelligence. Benchmark data is unavailable for one or both models.

Price
Grok 3
Terminal-Bench
Not called
Intelligence
Grok 3
Context window
Tied

Key takeaways

who wins on what, from the published numbers

GPT-4o wins

  • More serving providers (6 vs 4)
  • Supports vision
  • Supports audio
  • Supports prompt caching
  • Supports structured output

Grok 3 wins

  • Cheaper input ($2.50 vs $1.25 /1M)
  • Cheaper output ($10.00 vs $2.50 /1M)
  • Higher max output (16K vs 131K)
Cheaper overall
Grok 3
$1.25 + $2.50 /1M
Larger context
Tied
More providers
GPT-4o
6 providers

Pricing & specs

cheapest listed route · per 1M tokens
On-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
GPT-4oGrok 3
Input $/1M$2.50via OpenAI $1.25via xAI best
Output $/1M$10.00via OpenAI $2.50via xAI best
Context window131K 131K
Max output16K 131K best
Serving providers6 best4
DateReleased May 13, 2024 Released Jun 1, 2024

Benchmarks

Benchmark scores, side by side
GPT-4oGrok 3
Intelligence8.4 12.1 best
GPQA Diamond54% 69% best
Output speed150 t/s best100 t/s
Latency (TTFT)0.79s best1.65s

Cost calculator

choose a serving route for each side
Input tokens / month
Output tokens / month
GPT-4o
via Gmi
$23
Grok 3
via xAI
$8.75

Capabilities

feature support, side by side
FeatureGPT-4oGrok 3
Vision✓—
Tool use✓✓
Reasoning——
Audio✓—
Prompt caching✓—
Structured output✓—
Web search——

Related comparisons

Frequently asked questions

Which is cheaper, GPT-4o or Grok 3?
Grok 3 is cheaper for input ($2.50 vs $1.25 per 1M tokens) from xAI. Grok 3 is cheaper for output ($10.00 vs $2.50 per 1M tokens) from xAI.
What is the context window difference between GPT-4o and Grok 3?
Both GPT-4o and Grok 3 have about a 131K-token context window.
How do GPT-4o and Grok 3 compare on benchmarks?
On the tracked benchmarks, Grok 3 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Sep 22, 2026

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