Which is better, Gemini 3 Flash Preview or GPT-5.2?

Across 57 shared benchmarks tracked on Vector Wire, Gemini 3 Flash Preview leads on 17 and GPT-5.2 leads on 40 — GPT-5.2 leads on more. Strengths differ by axis; the table below shows every head-to-head number with provenance.

SEEDRefresh Models —Deals —Regulatory —Sources —

Gemini 3 Flash Preview vs GPT-5.2

GooglevsOpenAI57 shared benchmarks17–40 head-to-head

Benchmark	Gemini 3 Flash Preview	GPT-5.2
AA Agentic Index	49.7	60.2
AA Intelligence	38.7	43.3
AA-LCR	73	79.3
AA-Omniscience	10.1	0.3
AIME 2025	99.7	100
aime_2026	96.7	98.3
apexAgents	27.7	23
arc_agi_1	84.7	86.2
ARC-AGI-2	33.6	52.9
arena_elo	1473	1437
arena_text_factuality	1452	1442
arena_vision	1260	1245
Artificial Analysis Coding Index	42.6	48.7
charxiv_rq	80.3	82.1
coding_arena_elo	1387	1418
critpt	8.6	11.6
frontiermath_tier_4	4.2	18.8
gaia_level1	82.8	92.5
gaia_level2	66	74.8
gaia_level3	49	57.1
gaia_overall	68.4	77.4
gdpval	35.2	48.3
GDPval-AA (Elo)	1204	1462
GPQA Diamond	90.4	92.4
HLE	43.5	45.5
hmmt_feb_2025	97.5	100
hmmt_feb_2026	89.4	97
hmmt_nov_2025	93.3	99.2
IFBench	78	75.4
livebench	72.4	74.8
matharena_visual_math_overall	85.8	86.5
MCP Atlas	62	68
mmmlu	91.8	89.6
MMMU-Pro	81.2	79.5
mrcr_v2_8needle_128k_average	67.2	83.8
OmniDocBench 1.5	12.1	85.7
OmniScience Accuracy	53.4	44.3
OmniScience Non-Hallucination	7.6	38.4
scicode	50.6	52.1
screenspot_pro_no_tools	69.1	86.3
simplebench	61.1	45.8
simpleqa_verified	67.4	38.9
swe_bench_bash	75.8	72.8
SWE-bench Multilingual	72.7	72
SWE-bench Pro	49.6	55.6
SWE-bench Verified	78	80
TauBench V3 - Banking	20.8	11.1
Terminal-Bench 2.0	47.6	54
Terminal-Bench Hard	38.6	62.2
toolathlon	49.4	46.3
vectara_answer_rate	99.8	100
vectara_avg_summary_length	90.2	186.3
vectara_factual_consistency	86.5	89.2
vectara_hallucination_rate ↓	13.5	10.8
VideoMMMU	86.9	85.9
τ²-Bench Telecom (AA run)	80.4	98.7
τ³-Bench	17.5	12

Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing.