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Eetuki
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OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) vs Kimi K2.5: $2.00 vs $2.13 / 1M Tokens

Switching a 100M input / 20M output monthly workload from Kimi K2.5 to OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) saves $23.40/month ($280.80/year, -14%) on baseline token rates. For streaming responsiveness, OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) leads with a 410ms P90 TTFT (98 tok/s).

Contender A • OpenAI

OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA)

Standard Input / Output:$2.00 / $8.00
Warm Cache Read / Write:$0.5 / $2
Batch API (50% Off):$1 / $4
Context Window & Cliff:1,000,000 tokens
P90 TTFT / Throughput:410ms / 98 tok/s
Open OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) 6-Module Audit →
Contender B • KIMI

Kimi K2.5

Standard Input / Output:$2.13 / $8.52
Warm Cache Read / Write:$0.213 / $2.662
Batch API (50% Off):$1.065 / $4.26
Context Window & Cliff:200,000 tokens
P90 TTFT / Throughput:673ms / 94 tok/s
Open Kimi K2.5 6-Module Audit →
⚡ CONTEXT-MODE SANDBOX (315KB → 5.4KB) × ETUKI CACHE PINNING BENCHMARKOpen Full Context-Mode Calculator →

Coding Agent TCO (100 Sessions): Raw Tool Output (700KB) vs. Context-Mode + Etuki Prefix Cache

Execution Mode (100 Agent Sessions)OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA)Kimi K2.5Architectural Mechanism
Mode A: Direct Raw Tool Output (700 KB)$382.00$406.8347 × Read() dumped into context; hits 200K cliff
Mode B: Context-Mode Sandbox Only (3.6 KB)$60.00$73.48SQLite FTS5 & ctx_execute (98% byte drop, unpinned cache)
Mode C: Context-Mode + Etuki 4-Block Cache Lock$33.50 (-91%)$30.88 (-92%)98% tool stdout folding + 90% warm 0.1x prefix cache hit

Monthly Enterprise Workload TCO: OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) vs Kimi K2.5

Workload ScenarioOpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) (Cached)Kimi K2.5 (Cached)Recommended Routing Winner
① Coding Agent (15M In / 3M Out)$36.00/mo$34.51/moOpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA)
② Enterprise RAG (100M In / 15M Out)$200.00/mo$187.44/moOpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA)
③ Long-Doc SEC Analysis (250M In / 30M Out)$440.00/mo$404.70/moOpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA)
④ Async Batch Pipeline (500M In / 80M Out)$820.00/mo$873.30/moOpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) (50% Batch Discount)