Leaderboard · Compare · GPT-5 vs DeepSeek R1 · Updated
GPT-5 vs DeepSeek R1
GPT-5 edges out DeepSeek R1 on the composite (86.0 vs 75.4). The gap is meaningful but not decisive — see the per-benchmark breakdown below.
At a glance
| Spec | GPT-5 | DeepSeek R1 |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Released | 2025-08 | 2025-01 |
| Tier | frontier | open-weights |
| License | Closed | Open · MIT |
| Context window | 400k | 128k |
| $ in / out (per 1M) | $1.25 / $10.00 | $0.55 / $2.19 |
Benchmark scoreboard
Higher is better on every benchmark. Δ shows GPT-5 − DeepSeek R1.
| Benchmark | GPT-5 | DeepSeek R1 | Δ |
|---|---|---|---|
| Chatbot Arena Elo | 1410 | 1357 | +53 |
| MMLU-Pro | 86.8 | 84.0 | +2.8 |
| GPQA Diamond | 87.3 | 71.5 | +15.8 |
| MATH | 96.7 | 97.3 | -0.6 |
| HumanEval | 95.1 | 92.0 | +3.1 |
| SWE-Bench Verified | 74.9 | 49.2 | +25.7 |
Numbers compiled from provider technical reports and Chatbot Arena snapshots — see methodology.
OpenRouter routes GPT-5, DeepSeek R1, and 100+ other LLMs behind a single API key — pay-as-you-go, no monthly minimum, fallback if a provider is down. Try OpenRouter → (affiliate · supports this site)
GPT-5 vs DeepSeek R1: where each one wins
GPT-5 is stronger on
- Arena
- MMLU-Pro
- GPQA
- HumanEval
- SWE-Bench
DeepSeek R1 is stronger on
- MATH
Cost comparison
At 10M tokens/day (50/50 split), GPT-5 costs ~$56.25/day vs $13.70/day for DeepSeek R1 — DeepSeek R1 is the cheaper pick at this volume.
Verdict
GPT-5 edges out DeepSeek R1 on the composite (86.0 vs 75.4). The gap is meaningful but not decisive — see the per-benchmark breakdown below.
If you can only pick one and your workload is unclear, route via OpenRouter and switch by request — same key, no lock-in.
Frequently asked questions
Which is better, GPT-5 or DeepSeek R1?
GPT-5 edges out DeepSeek R1 on the composite (86.0 vs 75.4). The gap is meaningful but not decisive — see the per-benchmark breakdown below. GPT-5 wins on Arena, MMLU-Pro, GPQA, HumanEval, SWE-Bench; DeepSeek R1 wins on MATH.
What does GPT-5 cost compared to DeepSeek R1?
At 10M tokens/day (50/50 split), GPT-5 costs ~$56.25/day vs $13.70/day for DeepSeek R1 — DeepSeek R1 is the cheaper pick at this volume.
What is the context window of GPT-5 vs DeepSeek R1?
GPT-5: 400k tokens. DeepSeek R1: 128k tokens. GPT-5 has the larger window — useful for long-document RAG and full-codebase prompting.
Is GPT-5 or DeepSeek R1 open source?
GPT-5: closed / proprietary. DeepSeek R1: open weights (MIT).
Can I try GPT-5 and DeepSeek R1 on the same API key?
Yes — OpenRouter routes both models behind a single key, so you can A/B test GPT-5 against DeepSeek R1 without juggling provider accounts.
Model deep-dives: GPT-5 · DeepSeek R1 · Full leaderboard
Spotted out-of-date numbers? Open an issue — corrections usually ship within 24h.
Try GPT-5 and DeepSeek R1 now
One API key, both models — switch between them per request and let real traffic pick the winner.