DeepSeek V3 vs Grok 3
DeepSeek V3 (Azure AI Foundry, 128,000-token context) versus Grok 3 (Azure AI Foundry, 131,072-token context). DeepSeek V3 is cheaper by 68% on a blended token mix. Grok 3 uniquely supports function calling. Across 4 public benchmarks we tracked, DeepSeek V3 wins 0 and Grok 3 wins 4. Use the live calculator below to plug your real usage shape into both, then route the winner via Agent Command Center for shadow A/B without code changes.
Bottom line — DeepSeek V3 vs Grok 3
DeepSeek V3 and Grok 3 target overlapping workloads but differ sharply on economics. DeepSeek V3 runs roughly 68% cheaper on a blended input-plus-output token mix, which translates to approximately $11,844 per month at mid-market volume (100K requests/day). The gap compounds at enterprise scale, making the cost axis the first filter most teams apply when deciding between these two models.
On capability surface area, the models diverge: Grok 3 supports function calling where the other does not. These differences are binary — either your workload needs the capability or it does not. Check whether any critical path in your agent pipeline depends on a capability only one model provides before committing to a migration.
Across 4 public benchmarks, DeepSeek V3 leads on 0 and Grok 3 leads on 4. The widest gap is on arena-elo, where Grok 3 scores 92.0 points higher. Benchmarks are noisy and task-dependent — a model that leads on arena-elo may trail on code generation. The safest approach is to run both models on your own golden set before treating any benchmark as decisive.
For teams evaluating both models, the recommended path is a shadow A/B test: route production traffic through an OpenAI-compatible gateway, mirror a percentage to the candidate model, score both responses with an automated evaluator (faithfulness, tool-call correctness, latency), and compare cohort-level metrics over two weeks. Future AGI Agent Command Center supports this pattern with a single `base_url` change and built-in evaluators from the ai-evaluation SDK.
Live workload comparison
Same workload run through both models. The cheaper one is highlighted.
strategy: cost-optimized
primary:
model: deepseek-v3
provider: azure-ai-foundry
fallback:
model: grok-3
provider: azure-ai-foundry
shadow: { sample_rate: 0.05 } # mirror 5% of traffic to compare quality live| DeepSeek V3 | Grok 3 | |
|---|---|---|
| Input price | $1.14/M | $3.00/M |
| Output price | $4.56/M | $15.00/M |
| Context window | 128,000 | 131,072 |
| Max output | 8,192 | 131,072 |
| Function calling | — | ✓ |
| Vision | — | — |
| Audio input | — | — |
| Reasoning | — | — |
| Prompt caching | — | — |
| Structured output | — | — |
| Pricing verified | Jun 2, 2026 | Jun 2, 2026 |
Benchmark comparison
Side-by-side public benchmark scores. Greener bar = winner.
Cost at scale: monthly spend at three usage volumes
Estimated monthly cost assuming 1,000 input + 200 output tokens per request — a realistic chat-agent shape. Adjust your own usage in the calculator at the top of this page for an exact number.
| Scale | DeepSeek V3 | Grok 3 | Delta |
|---|---|---|---|
| Startup 10K requests/day | $616 /mo | $1,800 /mo | $1,184/mo |
| Mid-market 100K requests/day | $6,156 /mo | $18,000 /mo | $11,844/mo |
| Enterprise 1M requests/day | $61,560 /mo | $180,000 /mo | $118,440/mo |
At enterprise scale (1M requests/day), a difference of even ~10% in unit price compounds into thousands of dollars per month. Cached input pricing and batch tiers can shift this further — both are surfaced on each model's own page.
When to choose which
Picked from the data above — not vendor marketing. Match the rules to your workload, not the other way around.
You're cost-sensitive at scale — DeepSeek V3 runs ~68% cheaper on a blended in+out token mix, compounding into thousands of dollars per month at production volume.
Your agent calls tools or APIs — Grok 3 supports function calling natively, the other model needs a parser shim.
On arena-elo, Grok 3 scores 92.0 points higher — if your workload pattern matches that benchmark's task shape, the gap is meaningful.
Capability diff — what you gain and lose on the swap
A specific list of what each model has that the other doesn't. If your workload depends on a row in Only DeepSeek V3, switching to Grok 3 means re-architecting that path (and vice versa).
- • Function calling
Capabilities both share (1)
- ✓ Streaming
Benchmark winners — by the numbers
For each public benchmark that has scores for both models, the higher score and the size of the gap. Benchmarks are noisy — treat anything under a 2-point delta as effectively tied.
| Benchmark | DeepSeek V3 | Grok 3 | Winner | Δ |
|---|---|---|---|---|
| aime-2024 | 39.6 | 52.2 | Grok 3 | +12.6 |
| arena-elo | 1310.0 | 1402.0 | Grok 3 | +92.0 |
| gpqa-diamond | 59.1 | 75.4 | Grok 3 | +16.3 |
| mmlu-pro | 75.9 | 79.9 | Grok 3 | +4.0 |
Migration considerations
Concrete differences to wire through your stack before you flip traffic from one to the other.
- Max output tokens differ: 8,192 on DeepSeek V3 vs 131,072 on Grok 3. Long-form generation tasks may truncate differently — adjust streaming UI and chunking accordingly.
- Grok 3 has capabilities DeepSeek V3 lacks: Function calling. Worth wiring through the agent design before commit.
How to A/B test DeepSeek V3 vs Grok 3 in production
If you're stuck between the two, run them side-by-side on real traffic. Four steps the Future AGI team uses internally:
- 1. Point your existing OpenAI SDK at
https://gateway.futureagi.com/v1. No code change beyondbase_urland a virtual key. - 2. Mark DeepSeek V3 primary, mirror 20% of traffic to Grok 3 in shadow mode. Both responses are logged; only the primary is served to users.
- 3. Score every shadow response with an evaluator — faithfulness, tool-call correctness, response latency, cost. Built-in evaluators in ai-evaluation cover the common axes.
- 4. Compare cohort-level metrics after two weeks. Switch primary when the candidate wins on what matters to your workload — and stays within your latency budget.
Full walkthrough on the Agent Command Center page.
FAQ — DeepSeek V3 vs Grok 3
Which is cheaper, DeepSeek V3 or Grok 3? ▾
DeepSeek V3 is cheaper by roughly 68% on a blended input + output token mix. Input prices are $1.14/M for DeepSeek V3 versus $3.00/M for Grok 3; output prices are $4.56/M versus $15.00/M. The exact savings depend on your input:output ratio — use the live calculator above to plug in your own request shape.
What is the context window of DeepSeek V3 versus Grok 3? ▾
DeepSeek V3 supports up to 128,000 tokens of context. Grok 3 supports up to 131,072 tokens. Grok 3 has the larger window by a factor of 1.0x, which matters for long-document RAG, multi-turn agent sessions, and tasks that need to keep an entire codebase in working memory.
Do DeepSeek V3 and Grok 3 both support tool calling? ▾
Only Grok 3 supports native function calling. The other model can still be made to call tools through a structured-output workaround, but the reliability of that pattern is lower than native support.
When should I choose DeepSeek V3 over Grok 3? ▾
You're cost-sensitive at scale — DeepSeek V3 runs ~68% cheaper on a blended in+out token mix, compounding into thousands of dollars per month at production volume.
When should I choose Grok 3 over DeepSeek V3? ▾
Your agent calls tools or APIs — Grok 3 supports function calling natively, the other model needs a parser shim. On arena-elo, Grok 3 scores 92.0 points higher — if your workload pattern matches that benchmark's task shape, the gap is meaningful.
How do I A/B test DeepSeek V3 against Grok 3 in production? ▾
Route both through an OpenAI-compatible gateway like Future AGI Agent Command Center with shadow mode enabled. Send 100% of traffic to your primary model, mirror 10–20% to the candidate, score every response with an evaluator (faithfulness, tool-call correctness, response time), and compare cohort-level metrics for two weeks. Switch when the candidate wins on the metrics that matter to your workload and stays within your latency budget.