Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Grok Build 0.1 0616 | GPT-5 mini (high) |
|---|---|---|
| Input ($/M tokens) | $1 | $0.25 |
| Output ($/M tokens) | $2 | $2 |
Verdict. Grok Build 0.1 0616 wins the overall benchmark matchup 2–0 across 2 overlapping categories, but raw benchmark score is only one input to the decision.
Pricing. Both models sit in the budget bracket for output-token pricing. At 1.0× the per-million-token cost, GPT-5 mini (high) is meaningfully cheaper if your traffic is output-heavy (long completions, document generation, agent loops). GPT-5 mini (high) makes more sense when output volume is low and absolute reasoning quality justifies the premium.
Strengths. Grok Build 0.1 0616 is strongest on Coding Index (51.5), Intelligence Index (27.2). GPT-5 mini (high) leads on Intelligence Index (17.4), Coding Index (15.6).
Speed. On throughput, GPT-5 mini (high) generates tokens at 79 tok/s versus 59 tok/s — about 25% faster. On time-to-first-token, Grok Build 0.1 0616 responds in 600ms vs 96060ms, which matters most for chat-style UIs.
Provider. SpaceXAI and OpenAI sell to overlapping but distinct developer audiences: SpaceXAI tends to ship frontier reasoning models with premium positioning, while OpenAI often prices more aggressively. Your existing vendor relationships, billing, and SLA preferences may matter as much as the raw numbers above.
Workload cost. Workload scenarios (per million requests at 30M input + 15M output tokens): Grok Build 0.1 0616 costs $60.00 ($720/year); GPT-5 mini (high) costs $37.50 ($450/year). At a smaller 5M-input/2M-output scale (single-developer tool or prototype): Grok Build 0.1 0616 ≈ $9.00/run, GPT-5 mini (high) ≈ $5.25/run. At agent/realtime scale (200M input / 100M output per million requests): Grok Build 0.1 0616 ≈ $400/run, GPT-5 mini (high) ≈ $250/run. GPT-5 mini (high) becomes more attractive at higher volume — the absolute per-token pricing difference compounds when you ship at scale.
Recommendation. Both models have legitimate use cases — the right answer depends on whether you are optimizing for benchmark ceiling, latency, or unit cost. Start with the cheaper / faster model, evaluate against your specific task, and only switch if the upgrade shows a meaningful lift.
Head-to-head deltas
Data from Artificial Analysis API — 12 benchmarks
GPT-5 mini (high) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.69/M tokens vs $1.25/M for Grok Build 0.1 0616.
Grok Build 0.1 0616 wins 2 out of 12 benchmarks compared to 0 for GPT-5 mini (high). See the detailed benchmark chart above for per-category results.
GPT-5 mini (high) generates tokens faster at 79 tok/s vs 59 tok/s. Grok Build 0.1 0616 also has lower time-to-first-token (0.60s vs 96.06s).
Choose based on your priorities: GPT-5 mini (high) for lower cost, Grok Build 0.1 0616 for stronger benchmark performance, and GPT-5 mini (high) for faster generation. For latency-sensitive apps, check the TTFT comparison above.