codex-cli · fast
CODEX-CLI

codex-gpt-5.3-spark

OpenAI GPT-5.3 Codex Spark — ultra-fast coding preview

⚖ COMPARE MODELS
VALS INDEX
75.7% +/- 17.5
Accuracy
VALS INDEX
7.7s
Latency (median)
$VALS INDEX
$1.8118
Cost / Test (1P-est)
SCORE STATUSscored
TEST SETS11
RECORDED TRIALS265
CUSTOM PASS64%

Industry benchmarks

Accuracyattempts · responded
GPQA_DIAMOND GPQA Diamond
63.3%
30 attempts · 30 responded
HUMANEVAL_PLUS HumanEval+
88.0%
50 attempts · 50 responded
Industry benchmark Bars = accuracy %, black cap = that score

Custom 9-task suite

Mean /5n=trials
CUSTOM code_gen_long
5.00
20 trials
CUSTOM json_strict
5.00
20 trials
CUSTOM reasoning_multistep
5.00
20 trials
CUSTOM agentic_tool_use
4.70
20 trials
CUSTOM summarize
3.70
20 trials
CUSTOM code_debug
3.55
20 trials
CUSTOM agentic_prompt
3.10
20 trials
CUSTOM refactor_existing_code -
2.60
25 trials
CUSTOM creative_write
1.55
20 trials
Custom suite · scored 0–5 by consensus (m3 + Fable-5) ★ = task scored a 5 at least once · sorted by mean score

Cross-judge validation

m3 vs Fable-5 Δ

No judge bias detected on this model — m3 and Fable-5 agree across all tasks.

Per-task distribution

Score

All trials on this page were run through the harness. Industry suites use deterministic family-specific reference graders (no LLM judge). The custom suite is graded by consensus of minimax-m3 + claude-fable-5. See /industry/ for the full benchmark suite.