Codex CLI vs Gemini CLI
Side-by-side default footprint for the latest captured versions of both agents: request tokens, tool definitions, bundled skills, and sub-agent declarations.
Benchmark data last updated July 7, 2026 UTC
Token footprint summary
1.02× spread
Codex CLI loads 197 more default tokens than Gemini CLI.
Default tokens
o200k_base · latest request
8,710
8,513
+197
1.02×
Codex CLI
Gemini CLITools
11
8
+3
1.38×
Codex CLIGemini CLISkills
5
2
+3
2.50×
Codex CLIGemini CLISub-agents
0
3
-3
—
Codex CLIGemini CLIComparisons use each agent's latest captured hibench run. See methodology for capture details.
Token footprint summary
1.03× spread
Gemini CLI loads 367 more default tokens than Codex CLI.
Default tokens
Anthropic claude-opus-4-8 · latest request
13,506
13,873
-367
1.03×
Codex CLIGemini CLITools
11
8
+3
1.38×
Codex CLIGemini CLISkills
5
2
+3
2.50×
Codex CLIGemini CLISub-agents
0
3
-3
—
Codex CLIGemini CLIComparisons use each agent's latest captured hibench run. See methodology for capture details.