Compare · ModelsLive · 2 picked · head to head
DeepSeek V4 Flash vs o3
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
o3 wins on 4/7 benchmarks
o3 wins 4 of 7 shared benchmarks. Leads in reasoning · coding.
Category leads
speed·DeepSeek V4 Flashgeneral·DeepSeek V4 Flashreasoning·o3coding·o3
Hype vs Reality
Attention vs performance
DeepSeek V4 Flash
#39 by perf·#6 by attention
o3
#111 by perf·no signal
Best value
DeepSeek V4 Flash
9.2x better value than o3
DeepSeek V4 Flash
94.4 pts/$
$0.65/M
o3
10.2 pts/$
$5.00/M
Vendor risk
Mixed exposure
One or more vendors flagged
DeepSeek
$3.4B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
7 benchmarks · 2 models
DeepSeek V4 Flasho3
Artificial Analysis · Agentic Index
o3 leads by +5.0
Artificial Analysis Agentic Index · a composite score measuring how well a model performs in agentic workflows · multi-step tool use, planning, error recovery, and autonomous task completion. Aggregates results from multiple agentic benchmarks including SWE-bench, tool-use tests, and planning evaluations. The canonical single-number metric for "how good is this model as an agent?"
DeepSeek V4 Flash
31.1
o3
36.1
Artificial Analysis · Coding Index
DeepSeek V4 Flash leads by +17.8
Artificial Analysis Coding Index · a composite score that aggregates performance across multiple coding benchmarks into a single index. Tracks code generation quality, debugging ability, multi-language competence, and real-world software engineering tasks. Used by Artificial Analysis to rank model coding capability in a normalized, comparable format. Useful for developers choosing between models for coding-heavy workloads.
DeepSeek V4 Flash
56.2
o3
38.4
Artificial Analysis · Quality Index
DeepSeek V4 Flash leads by +20.1
DeepSeek V4 Flash
40.3
o3
20.2
Dtbench
DeepSeek V4 Flash leads by +2.7
DeepSeek V4 Flash
77.3
o3
74.7
Lmca
o3 leads by +4.5
DeepSeek V4 Flash
42.2
o3
46.7
SimpleBench
o3 leads by +8.2
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
DeepSeek V4 Flash
35.6
o3
43.7
WeirdML
o3 leads by +6.8
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
DeepSeek V4 Flash
45.6
o3
52.4
Full benchmark table
| Benchmark | DeepSeek V4 Flash | o3 |
|---|---|---|
Artificial Analysis · Agentic Index Artificial Analysis Agentic Index · a composite score measuring how well a model performs in agentic workflows · multi-step tool use, planning, error recovery, and autonomous task completion. Aggregates results from multiple agentic benchmarks including SWE-bench, tool-use tests, and planning evaluations. The canonical single-number metric for "how good is this model as an agent?" | 31.1 | 36.1 |
Artificial Analysis · Coding Index Artificial Analysis Coding Index · a composite score that aggregates performance across multiple coding benchmarks into a single index. Tracks code generation quality, debugging ability, multi-language competence, and real-world software engineering tasks. Used by Artificial Analysis to rank model coding capability in a normalized, comparable format. Useful for developers choosing between models for coding-heavy workloads. | 56.2 | 38.4 |
Artificial Analysis · Quality Index | 40.3 | 20.2 |
Dtbench | 77.3 | 74.7 |
Lmca | 42.2 | 46.7 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 35.6 | 43.7 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 45.6 | 52.4 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.03 | $1.28 | 1.0M tokens (~524 books) | $3.39 | |
| $2.00 | $8.00 | 200K tokens (~100 books) | $35.00 |