Pairwise benchmark snapshot · Aug 16, 2026
In this head-to-head showdown, GPT-5.6 Sol delivers higher overall intelligence and human-preferred responses (Elo 1,608 vs 1,420), while GPT-5.6 Sol leads in SWE-bench software engineering benchmarks (77.6%), while Kimi Chat 1.5 is more budget-friendly at $0.8/1M per 1M output tokens. 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 flagship tier. Official API $5/$30 per 1M tokens (OpenAI pricing, Jul 30 2026 update left Sol unchanged).
Moonshot ultra-long context model supporting up to 2 million tokens per request.
Currently comparing GPT-5.6 Sol vs Kimi Chat 1.5. Alternative family tiers available.
Simulate accuracy gains vs added response time & token cost
Reasoning models “think before answering” by generating internal reasoning tokens. Higher effort improves math, coding, and logic accuracy, but increases response delay and token costs.
Δ 188 Arena Elo pts
95 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 Sol | Kimi Chat 1.5 | Advantage Delta |
|---|---|---|---|
| Preference Elo | +188 | ||
| Coding Elo | +212 | ||
| LiveBench | +15.9% | ||
| SWE-bench | +26.6% | ||
| GPQA Diamond | +15.3% | ||
| Time to first token | +60 ms | ||
| Output speed | 84 tok/s | 95 tok/s | +11 tok/s |
| Input price | $0.2/1M | +$4.8/1M | |
| Output price | $0.8/1M | +$29.2/1M | |
| Context window | +1M |
Simulate monthly production API costs in USD (US Dollar).
Kimi Chat 1.5 is estimated to save $606.00/month ($7,272/year).
Higher SWE-bench (77.6%).
Lower output list price ($0.8/1M).
Lower TTFT (210 ms).
Larger window (2M).
GPT-5.6 Sol is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | GPT-5.6 Sol | Higher SWE-bench (77.6%). |
| High-volume chat | Kimi Chat 1.5 | Lower output list price ($0.8/1M). |
| Voice / low-latency UI | Kimi Chat 1.5 | Lower TTFT (210 ms). |
| Long-document RAG | Kimi Chat 1.5 | Larger window (2M). |
| Screenshots / vision | GPT-5.6 Sol | GPT-5.6 Sol is the side marked multimodal in the catalog. |
Brand hub remaps to top xAI vs top OpenAI. After Aug 12 that is Grok 4.6 vs Sol.
Not a frozen 2025 article. Today that is usually Opus 5 vs GPT-5.6 Sol. Dated cells, not a brand fight.
Hub remaps to top Google vs top OpenAI Elo. Usually 3.6 Pro vs Sol. Window vs price is the plot.
Jul 9 2026 family; Jul 30 price update left Sol unchanged. This is the GPT side of Claude vs GPT.
No comments posted on this matchup yet. Be the first to share an evaluation note!
Dynamic OpenGraph banner generated at /compare/gpt-5-6-sol-vs-kimi-1-5-long/opengraph-image
Verified Head-to-Head Telemetry
compare · Aug 12, 2026
Grok vs ChatGPT: price and Elo, not a personality contest
compare · Jul 24, 2026
Claude vs GPT benchmark: this hub always remaps to the current Elo leaders
compare · Jul 16, 2026
Gemini vs GPT: long context versus the OpenAI flagship invoice
launch · Jul 9, 2026
GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard
