Compare · ModelsLive · 2 picked · head to head
DeepSeek V4 Flash 0731 vs gpt-oss-20b
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
DeepSeek V4 Flash 0731 wins on 6/6 benchmarks
DeepSeek V4 Flash 0731 wins 6 of 6 shared benchmarks. Leads in knowledge · general · math.
Category leads
knowledge·DeepSeek V4 Flash 0731general·DeepSeek V4 Flash 0731math·DeepSeek V4 Flash 0731coding·DeepSeek V4 Flash 0731
Hype vs Reality
Attention vs performance
DeepSeek V4 Flash 0731
#76 by perf·#6 by attention
gpt-oss-20b
#97 by perf·no signal
Best value
gpt-oss-20b
11.5x better value than DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731
85.5 pts/$
$0.65/M
gpt-oss-20b
983.3 pts/$
$0.05/M
Vendor risk
Mixed exposure
One or more vendors flagged
DeepSeek
$3.4B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
6 benchmarks · 2 models
DeepSeek V4 Flash 0731gpt-oss-20b
Chess Puzzles
DeepSeek V4 Flash 0731 leads by +29.5
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
DeepSeek V4 Flash 0731
29.5
gpt-oss-20b
0.0
Dtbench
DeepSeek V4 Flash 0731 leads by +38.2
DeepSeek V4 Flash 0731
84.9
gpt-oss-20b
46.7
GPQA diamond
DeepSeek V4 Flash 0731 leads by +40.3
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
DeepSeek V4 Flash 0731
88.0
gpt-oss-20b
47.7
Lmca
DeepSeek V4 Flash 0731 leads by +32.0
DeepSeek V4 Flash 0731
49.1
gpt-oss-20b
17.1
OTIS Mock AIME 2024-2025
DeepSeek V4 Flash 0731 leads by +29.2
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
DeepSeek V4 Flash 0731
94.4
gpt-oss-20b
65.2
WeirdML
DeepSeek V4 Flash 0731 leads by +22.0
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
DeepSeek V4 Flash 0731
63.0
gpt-oss-20b
40.9
Full benchmark table
| Benchmark | DeepSeek V4 Flash 0731 | gpt-oss-20b |
|---|---|---|
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 29.5 | 0.0 |
Dtbench | 84.9 | 46.7 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 88.0 | 47.7 |
Lmca | 49.1 | 17.1 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 94.4 | 65.2 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 63.0 | 40.9 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.02 | $1.28 | 1.0M tokens (~524 books) | $3.31 | |
| $0.02 | $0.09 | 131K tokens (~66 books) | $0.36 |