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OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) vs Gemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA): $2.00 vs $1.25 / 1M Tokens

Switching a 100M input / 20M output monthly workload from OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) to Gemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA) saves $35.00/month ($420.00/year, -38%) 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 • Google Vertex / AI Studio

Gemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA)

Standard Input / Output:$1.25 / $10.00
Warm Cache Read / Write:$0.31 / $1.25
Batch API (50% Off):$0.625 / $5
Context Window & Cliff:2,000,000 tokens
P90 TTFT / Throughput:560ms / 86 tok/s
Open Gemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA) 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)Gemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA)Architectural Mechanism
Mode A: Direct Raw Tool Output (700 KB)$382.00$258.7547 × Read() dumped into context; hits 200K cliff
Mode B: Context-Mode Sandbox Only (3.6 KB)$60.00$52.50SQLite FTS5 & ctx_execute (98% byte drop, unpinned cache)
Mode C: Context-Mode + Etuki 4-Block Cache Lock$33.50 (-91%)$33.40 (-87%)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 Gemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA)

Workload ScenarioOpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) (Cached)Gemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA) (Cached)Recommended Routing Winner
① Coding Agent (15M In / 3M Out)$36.00/mo$37.47/moGemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA)
② Enterprise RAG (100M In / 15M Out)$200.00/mo$199.80/moGemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA)
③ Long-Doc SEC Analysis (250M In / 30M Out)$440.00/mo$424.50/moGemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA)
④ Async Batch Pipeline (500M In / 80M Out)$820.00/mo$712.50/moGemini 4 Argon (Mapped to Google Gemini 2.5 Pro GA) (50% Batch Discount)