Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | KAT Coder Pro V2 | Solar Pro 4 |
|---|---|---|
| Input ($/M tokens) | $0.3 | $0.3 |
| Output ($/M tokens) | $1.2 | $1.2 |
Verdict. KAT Coder Pro V2 and Solar Pro 4 split the benchmark comparison evenly at 1–1. The tiebreaker here is price, speed, and what you actually run them on.
Pricing. Both models sit in the budget bracket for output-token pricing. At 1.0× the per-million-token cost, Solar Pro 4 is meaningfully cheaper if your traffic is output-heavy (long completions, document generation, agent loops). Solar Pro 4 makes more sense when output volume is low and absolute reasoning quality justifies the premium.
Strengths. KAT Coder Pro V2 is strongest on Coding Index (59.5), Intelligence Index (33.7). Solar Pro 4 leads on Coding Index (52.7), Intelligence Index (41.6).
Speed. On throughput, KAT Coder Pro V2 generates tokens at 107 tok/s versus 47 tok/s — about 56% faster. On time-to-first-token, KAT Coder Pro V2 responds in 1380ms vs 2530ms, which matters most for chat-style UIs.
Provider. KwaiKAT and Upstage sell to overlapping but distinct developer audiences: KwaiKAT tends to ship frontier reasoning models with premium positioning, while Upstage 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): KAT Coder Pro V2 costs $27.00 ($324/year); Solar Pro 4 costs $27.00 ($324/year). At a smaller 5M-input/2M-output scale (single-developer tool or prototype): KAT Coder Pro V2 ≈ $3.90/run, Solar Pro 4 ≈ $3.90/run. At agent/realtime scale (200M input / 100M output per million requests): KAT Coder Pro V2 ≈ $180/run, Solar Pro 4 ≈ $180/run.
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
Both models have similar pricing. Check the detailed breakdown above for input vs output token costs.
It's a tie — both models win 1 benchmarks each across 12 evaluated categories. See the detailed benchmark chart above for per-category results.
KAT Coder Pro V2 generates tokens faster at 107 tok/s vs 47 tok/s. KAT Coder Pro V2 also has lower time-to-first-token (1.38s vs 2.53s).
Choose based on your priorities: both are similarly priced, both perform similarly on benchmarks, and KAT Coder Pro V2 for faster generation. For latency-sensitive apps, check the TTFT comparison above.