Compare · ModelsLive · 2 picked · head to head
GPT-5.3-Codex vs Grok 3 Beta
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Grok 3 Beta wins on 0/0 benchmarks
Not enough overlapping benchmarks to declare a winner yet · GPT-5.3-Codex · Grok 3 Beta are still filling in scores.
Hype vs Reality
Attention vs performance
GPT-5.3-Codex
#73 by perf·#4 by attention
Grok 3 Beta
#19 by perf·no signal
Best value
Grok 3 Beta
1.1x better value than GPT-5.3-Codex
GPT-5.3-Codex
7.1 pts/$
$7.88/M
Grok 3 Beta
7.7 pts/$
$9.00/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
xAI
$250.0B·Tier 1
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $1.75 | $14.00 | 400K tokens (~200 books) | $48.13 | |
| $3.00 | $15.00 | 131K tokens (~66 books) | $60.00 |