Pairwise benchmark snapshot · Aug 16, 2026
In this head-to-head showdown, GPT-5.6 Terra delivers higher overall intelligence and human-preferred responses (Elo 1,548 vs 1,420), while GPT-5.6 Terra leads in SWE-bench software engineering benchmarks (70.4%), while Kimi Chat 1.5 is more budget-friendly at $0.8/1M per 1M output tokens, while GPT-5.6 Terra provides faster response streaming (128 tok/s). Review the complete breakdown below to determine which model best fits your performance and budget requirements.
10 direct benchmark disciplines evaluated across capability, speed, and cost
OpenAI 5.6 mid tier. Official API $2/$12 per 1M after the Jul 30 2026 price cut.
Moonshot ultra-long context model supporting up to 2 million tokens per request.
Currently comparing GPT-5.6 Terra vs Kimi Chat 1.5. Alternative family tiers available.
Δ 128 Arena Elo pts
128 tok/s
$0.8 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Comparing top Western standard models with China's leading frontier rival across 6 skill dimensions. Tap any spoke or dot to inspect.
Category wins across reasoning intelligence, generation speed, and token cost.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
| Benchmark | GPT-5.6 Terra | Kimi Chat 1.5 | Advantage Delta |
|---|---|---|---|
| Preference Elo | +128 | ||
| Coding Elo | +152 | ||
| LiveBench | +11.1% | ||
| SWE-bench | +19.4% | ||
| GPQA Diamond | +10.5% | ||
| Time to first token | +50 ms | ||
| Output speed | 128 tok/s | 95 tok/s | +33 tok/s |
| Input price | $0.2/1M | +$1.8/1M | |
| Output price | $0.8/1M | +$11.2/1M | |
| Context window | +1M |
Simulate monthly production API costs in USD (US Dollar).
Kimi Chat 1.5 is estimated to save $231.00/month ($2,772/year).
Higher SWE-bench (70.4%).
Lower output list price ($0.8/1M).
Lower TTFT (160 ms).
Larger window (2M).
GPT-5.6 Terra is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | GPT-5.6 Terra | Higher SWE-bench (70.4%). |
| High-volume chat | Kimi Chat 1.5 | Lower output list price ($0.8/1M). |
| Voice / low-latency UI | GPT-5.6 Terra | Lower TTFT (160 ms). |
| Long-document RAG | Kimi Chat 1.5 | Larger window (2M). |
| Screenshots / vision | GPT-5.6 Terra | GPT-5.6 Terra is the side marked multimodal in the catalog. |
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