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Best Model for Ad Copy Generation

Ranked models for generating diverse headline and CTA variants under strict constraints.

#1 Recommendation

gpt-4o

Strong on Creative Writing Official (EQ-Bench Slice) creative_writing_score (84%) and CRMArena Function Calling overall_score_pct (82%)

external/openai/gpt-4o

28.8%

Score

35.8%

Confidence

12

Evidence

Runners-up:#2 qwen-2.5-72b-instruct (25.5%)#3 Grok-4-0709 (22.9%)#4 gemini-2.5-pro (22.6%)

Ranked Models

30

Evidence Quality

81%

Scoring

Benchmark-backed

Top Signal

Creative Writing Official (EQ-Bench Slice): creative_writing_score

All Ranked Models

Max params:
Min confidence:
30 of 30
RankModelScore
#1gpt-4o

Strong on Creative Writing Official (EQ-Bench Slice) creative_writing_score (84%) and CRMArena Function Calling overall_score_pct (82%)

28.8%
#2qwen-2.5-72b-instruct

Strong on Creative Writing Official (EQ-Bench Slice) creative_writing_score (78%) and EQ-Bench Leaderboard eq_bench_score (92%)

25.5%
#4Grok-4-0709
22.9%
#5gemini-2.5-pro
22.6%
#6gpt-4.1-20250414
22.6%
#10claude-sonnet-4-20250514
19.6%
#12gemini-3-pro-preview
17.7%
#13gemma-2-27b-it
16.6%
#14gemini-2.5-flash
16.4%
#15google/gemini-3.1-pro-preview
16.0%
#19gpt-5-2025-08-07
14.8%
#21openai/gpt-5.4-2026-03-05
14.5%
#23gpt-5.1-2025-11-13
14.1%
#24anthropic/claude-sonnet-4.6
14.0%
#26claude-opus-4-5-20251101
13.9%
#27xai-org/grok-4-fast-reasoning
13.9%
#29gpt-5-mini-2025-08-07
13.6%
#30gpt-4.1-mini-20250414
13.4%
#32anthropic/claude-opus-4-6-thinking
13.3%
#33gemini-3-flash-preview
13.2%
#34xai-org/grok-4-1-fast-reasoning
13.2%
#35gpt-5.2-2025-12-11
13.1%
#38anthropic/claude-opus-4-5-20251101-thinking
12.8%
#40gemma-7b-it
12.7%
#43grok/grok-4.20-beta-0309-reasoning
12.6%
#44Llama-2-7b-chat-hf
12.5%
#48kimi/kimi-k2.5-thinking
11.9%
#50anthropic/claude-sonnet-4-5-20250929-thinking
11.7%
#53Kimi-K2-Instruct
11.1%
#55o3-20250416
11.1%

Head-to-Head: #1 vs #2

#1

Top Pick

gpt-4o

Strong on Creative Writing Official (EQ-Bench Slice) creative_writing_score (84%) and CRMArena Function Calling overall_score_pct (82%)

28.8%

Conf 35.8%

#2

qwen-2.5-72b-instruct

Strong on Creative Writing Official (EQ-Bench Slice) creative_writing_score (78%) and EQ-Bench Leaderboard eq_bench_score (92%)

25.5%

Conf 37.0%

Full Comparison with Benchmark Evidence →
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