DeepSeek V3 0324 vs Gemini 2.5 Flash Preview 05-20
Gemini 2.5 Flash Preview 05-20 comes out ahead, 67 to 52 on our weighted score, though DeepSeek V3 0324 is 19% cheaper per token.
DeepSeekDeepSeek V3 0324
52/100- ECI135.9
- Price$0.275 / $1.12
- Context164K
- Our pick
GoogleGemini 2.5 Flash Preview 05-20
67/100- ECI141.5
- Price$0.146 / $1.96
- Context1.05M
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Make it a three-way comparison.
Gemini 2.5 Flash Preview 05-20 is our pick
Gemini 2.5 Flash Preview 05-20 is the better all-round choice, scoring 67/100 against DeepSeek V3 0324 (52). It leads on capability, inputs & features and context window. DeepSeek V3 0324 wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityGemini 2.5 Flash Preview 05-20Capabilities Index (ECI): Gemini 2.5 Flash Preview 05-20 141.5 · DeepSeek V3 0324 135.9
- Lowest priceDeepSeek V3 0324DeepSeek V3 0324 $0.486 · Gemini 2.5 Flash Preview 05-20 $0.60 per 1M tokens (3:1 blend)
- Longest contextGemini 2.5 Flash Preview 05-20Gemini 2.5 Flash Preview 05-20 1,048,576 · DeepSeek V3 0324 163,840 tokens
- Widest inputsGemini 2.5 Flash Preview 05-20DeepSeek V3 0324: Text · Gemini 2.5 Flash Preview 05-20: Text, Images, PDFs, Audio, Video
- Self-hostingDeepSeek V3 0324Publishes downloadable weights
| Measure | Weight | DeepSeek V3 0324 | Gemini 2.5 Flash Preview 05-20 |
|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 59 | 66 |
| Price | 25% | 62 | 58 |
| Inputs & features | 15% | 25 | 90 |
| Context window | 10% | 28 | 61 |
| Overall | 100% | 52/100 | 67/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | DeepSeek V3 0324DeepSeek | Gemini 2.5 Flash Preview 05-20Google |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | 135.9 | 141.5 (best) |
| ECI rank | #128 of 165 | #106 of 165 (best) |
| GPQA DiamondGraduate-level science questions | 67.6% | — |
| OTIS Mock AIME 2024–2025Competition mathematics | 37.8% | 70.8% (best) |
| Price per million tokens | ||
| Input | $0.275 | $0.146 (best) |
| Output | $1.12 (best) | $1.96 |
| Cached input | — | — |
| Blended (3:1) | $0.486 (best) | $0.60 |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 13 providers | Median of 2 providers |
| Limits | ||
| Context window | 163,840 tokens | 1,048,576 tokens (best) |
| Max output | 163,840 tokens (best) | 65,536 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | Yes |
| PDFs | No | Yes |
| Audio | No | Yes |
| Video | No | Yes |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Open | Proprietary |
| API model ID | — | — |
| API providers | 13 (best) | 2 |
| Released | Mar 24, 2025 | May 20, 2025 |
| Knowledge cutoff | — | Jan 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- DeepSeek V3 0324$4.99
- Gemini 2.5 Flash Preview 05-20$5.39
Which should you choose?
Which is better: DeepSeek V3 0324 or Gemini 2.5 Flash Preview 05-20?
Gemini 2.5 Flash Preview 05-20 is the better all-round choice, scoring 67/100 against DeepSeek V3 0324 (52). It leads on capability, inputs & features and context window. DeepSeek V3 0324 wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, DeepSeek V3 0324 or Gemini 2.5 Flash Preview 05-20?
DeepSeek V3 0324 is cheaper at $0.275 input / $1.12 output per million tokens (median across 13 API providers). Gemini 2.5 Flash Preview 05-20 costs $0.146 input / $1.96 output per million tokens (median across 2 API providers). At a typical mix of three input tokens to one output token, that is $0.486 per million tokens for DeepSeek V3 0324 versus $0.60 for Gemini 2.5 Flash Preview 05-20 (1.2× as much).
Which scores higher on benchmarks?
Gemini 2.5 Flash Preview 05-20 scores higher on the Capabilities Index (ECI): Gemini 2.5 Flash Preview 05-20 141.5 (#106 of 165) and DeepSeek V3 0324 135.9 (#128 of 165). Their confidence ranges do not overlap (139.3–142.9 vs 132.5–137.7), so the gap is a real one. On individual benchmarks: OTIS Mock AIME 2024–2025 — Gemini 2.5 Flash Preview 05-20 70.8%, DeepSeek V3 0324 37.8%.
Which is better for coding?
There are no published SWE-bench Verified results for DeepSeek V3 0324 and Gemini 2.5 Flash Preview 05-20 yet, so there is no like-for-like coding score. On overall capability, Gemini 2.5 Flash Preview 05-20 leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.
Which has the bigger context window?
Gemini 2.5 Flash Preview 05-20 has the largest context window at 1,048,576 tokens, against 163,840 for DeepSeek V3 0324. Maximum output per response: DeepSeek V3 0324 up to 163,840, Gemini 2.5 Flash Preview 05-20 up to 65,536 tokens.
Which can read images, PDFs, audio or video?
DeepSeek V3 0324 accepts text; Gemini 2.5 Flash Preview 05-20 accepts text, images, PDFs, audio and video. Gemini 2.5 Flash Preview 05-20 handles the widest range of inputs.
Are any of these open source?
DeepSeek V3 0324 publishes its weights and can be self-hosted; Gemini 2.5 Flash Preview 05-20 is proprietary.
Which is newer?
Gemini 2.5 Flash Preview 05-20 is the newest, released May 20, 2025. DeepSeek V3 0324 came out Mar 24, 2025. Knowledge cutoff: Gemini 2.5 Flash Preview 05-20 Jan 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
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