Comparison

Codex Pro 200 vs X Ultra + Build for coding

At p50 peak, Codex Pro 200 returns 0.10 building h/week per $/month (20 h/week for $200/mo) and X Ultra + Build returns 0.18 building h/week per $/month (36 h/week for $200/mo), so X Ultra + Build gives more building hours per dollar; on building benchmark quality Codex Pro 200 runs GPT-6.1 Sol (high) · Codex · 60/100 and X Ultra + Build runs Grok 4.7 (xhigh) · Grok Build · 56/100; Codex Pro 200 hours are guessed — treat them as a guess; X Ultra + Build hours are guessed — treat them as a guess.

Codex Pro 200 vs X Ultra + Build, side by side

Same catalog, same clock: p50 with p10–p90 intervals. Quality is each seat's coding-agent benchmark score with its agent and reasoning setting.

Codex Pro 200X Ultra + Build
Price$200/mo$200/mo
Building h/week p50 (p10–p90), peak20 (10–32)36 (14–60)
Building h/week p50 (p10–p90), off-peak——
Building h/week per $/mo at p50 peak0.100.18
Benchmark quality /100sGPT-6.1 Sol (high) · Codex · 60/100 planning · GPT-6.1 Sol (high) · Codex · 60/100 building · GPT-6.1 Sol (high) · Codex · 60/100 adminGrok 4.7 (xhigh) · Grok Build · 56/100 planning · Grok 4.7 (xhigh) · Grok Build · 56/100 building · Grok 4.7 (xhigh) · Grok Build · 56/100 admin
Sourceguessedguessed
Terminal CLI agentYesYes
Clockno published off-peak discountshared weekly pool, no off-peak rate
Codex Pro 200 plan pageX Ultra + Build plan pageOpen both in the stack builder →