⚡ VERIFIED HEAD-TO-HEAD FINOPS & LATENCY AUDIT • ★ 4.9/5 (455 Reviews)
DeepSeek V4 Flash vs OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA): $0.21 vs $2.00 / 1M Tokens
Switching a 100M input / 20M output monthly workload from OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) to DeepSeek V4 Flash saves $322.20/month ($3866.40/year, -90%) on baseline token rates. For streaming responsiveness, DeepSeek V4 Flash leads with a 219ms P90 TTFT (129 tok/s).
Contender A • DEEPSEEK
DeepSeek V4 Flash
Standard Input / Output:$0.21 / $0.84
Warm Cache Read / Write:$0.021 / $0.263
Batch API (50% Off):$0.105 / $0.42
Context Window & Cliff:128,000 tokens
P90 TTFT / Throughput:219ms / 129 tok/s
Contender B • 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
⚡ 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) | DeepSeek V4 Flash | OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) | Architectural Mechanism |
|---|---|---|---|
| Mode A: Direct Raw Tool Output (700 KB) | $40.11 | $382.00 | 47 × Read() dumped into context; hits 200K cliff |
| Mode B: Context-Mode Sandbox Only (3.6 KB) | $7.25 | $60.00 | SQLite FTS5 & ctx_execute (98% byte drop, unpinned cache) |
| Mode C: Context-Mode + Etuki 4-Block Cache Lock | $3.04 (-92%) | $33.50 (-91%) | 98% tool stdout folding + 90% warm 0.1x prefix cache hit |
Monthly Enterprise Workload TCO: DeepSeek V4 Flash vs OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA)
| Workload Scenario | DeepSeek V4 Flash (Cached) | OpenAI GPT 6.1 Terra (Mapped to OpenAI GPT-4.1 GA) (Cached) | Recommended Routing Winner |
|---|---|---|---|
| ① Coding Agent (15M In / 3M Out) | $3.40/mo | $36.00/mo | DeepSeek V4 Flash |
| ② Enterprise RAG (100M In / 15M Out) | $18.48/mo | $200.00/mo | DeepSeek V4 Flash |
| ③ Long-Doc SEC Analysis (250M In / 30M Out) | $39.90/mo | $440.00/mo | DeepSeek V4 Flash |
| ④ Async Batch Pipeline (500M In / 80M Out) | $86.10/mo | $820.00/mo | DeepSeek V4 Flash (50% Batch Discount) |