Compare · ModelsLive · 2 picked · head to head
o3 vs DeepSeek V4 Flash
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
DeepSeek V4 Flash wins on 2/3 benchmarks
DeepSeek V4 Flash wins 2 of 3 shared benchmarks. Leads in speed.
Category leads
speed·DeepSeek V4 Flash
Hype vs Reality
Attention vs performance
o3
#91 by perf·no signal
DeepSeek V4 Flash
#31 by perf·no signal
Best value
DeepSeek V4 Flash
49.5x better value than o3
o3
10.8 pts/$
$5.00/M
DeepSeek V4 Flash
533.3 pts/$
$0.13/M
Vendor risk
Mixed exposure
One or more vendors flagged
OpenAI
$840.0B·Tier 1
DeepSeek
$3.4B·Tier 1
Head to head
3 benchmarks · 2 models
o3DeepSeek V4 Flash
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?"
o3
36.1
DeepSeek V4 Flash
31.1
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.
o3
38.4
DeepSeek V4 Flash
56.2
Artificial Analysis · Quality Index
DeepSeek V4 Flash leads by +9.9
o3
30.4
DeepSeek V4 Flash
40.3
Full benchmark table
| Benchmark | o3 | DeepSeek V4 Flash |
|---|---|---|
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?" | 36.1 | 31.1 |
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. | 38.4 | 56.2 |
Artificial Analysis · Quality Index | 30.4 | 40.3 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $2.00 | $8.00 | 200K tokens (~100 books) | $35.00 | |
| $0.08 | $0.17 | 1.0M tokens (~524 books) | $1.05 |