Claude 3.5 Haiku vs OpenAI GPT-6.1 Sol — API Pricing, 150K Cache & Latency Benchmark
Side-by-side unit economics audit comparing Claude 3.5 Haiku (claude/claude-3-5-haiku: Input $0.15/1M, Output $0.6/1M, Warm Cache Read $0.015/1M) against OpenAI GPT-6.1 Sol (openai/gpt-6.1-sol: Input $2/1M, Output $10/1M, Warm Cache Read $0.1/1M).
Activate 4-breakpoint prefix caching on Claude 3.5 Haiku to cut input token costs from $0.15/1M down to $0.015/1M, or route async workloads via Batch API for 50% off.
Lock static system prompt prefixes on OpenAI GPT-6.1 Sol to pay $0.1/1M warm cache rates instead of $2/1M uncached input, plus eligible startup cloud credits.
In Etuki FinOps telemetry comparing Claude 3.5 Haiku (API ID: claude/claude-3-5-haiku) vs OpenAI GPT-6.1 Sol (API ID: openai/gpt-6.1-sol), Claude 3.5 Haiku offers lower standard uncached input pricing at $0.15/1M tokens, while Claude 3.5 Haiku leads in 10-turn 150K cache-pinned coding economics at $0.0547 per 10 turns (saving $0.5803 over OpenAI GPT-6.1 Sol). For latency-sensitive interactive agents, Claude 3.5 Haiku delivers 20ms faster P90 time-to-first-token (245ms vs 265ms).
| Specification / FinOps Dimension | Claude 3.5 Haiku (claude/claude-3-5-haiku) | OpenAI GPT-6.1 Sol (openai/gpt-6.1-sol) | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | claude/claude-3-5-haiku | openai/gpt-6.1-sol | UMCE 563-Registry Locked |
| 563-Registry & Routing Eligibility | is_known: false | routable: true | is_known: true | routable: true | Both Merkle Verified |
| Standard Uncached Input (/1M tokens) | $0.15 / 1M | $2 / 1M | Claude 3.5 Haiku |
| Warm Prefix Cache Read (/1M tokens) | $0.015 / 1M | $0.1 / 1M | Claude 3.5 Haiku |
| Standard Output (/1M tokens) | $0.6 / 1M | $10 / 1M | Claude 3.5 Haiku |
| Context Window Capacity | 200K Tokens | 200K Tokens | Claude 3.5 Haiku |
| 150K Prompt × 10 Turns (Unpinned Cold + 2K Out) | $0.2370 | $3.2000 | Claude 3.5 Haiku |
| 150K × 10 Turns Case A (100% Static Pinned) | $0.0547 (saves $0.1823) | $0.6350 (saves $2.5650) | Claude 3.5 Haiku (-$0.5803) |
| 150K × 10 Turns Case B (90% Static + 10% Tail) | $0.0730 (saves $0.1640) | $0.8915 (saves $2.3085) | Claude 3.5 Haiku |
| P50 / P90 First-Token Latency | 167ms / 245ms (92 tok/s) | 180ms / 265ms (115 tok/s) | Claude 3.5 Haiku (-20ms) |
1. Full-Turn Rate-Card Substitution for Claude 3.5 Haiku: At an uncached input rate of $0.15/1M, output rate of $0.6/1M, and warm cache read rate of $0.015/1M, running 10 consecutive 150,000-token coding agent turns (with 2,000 output tokens/turn) without prefix pinning costs $0.2370. Locking 100% static prefixes (Case A: 1 cold turn + 9 warm cached turns + 20K total output) reduces 10-turn spend to $0.0547 (saving $0.1823); under a 90% static prefix + 10% dynamic tail workload (Case B), 10-turn spend is $0.0730.
2. Full-Turn Rate-Card Substitution for OpenAI GPT-6.1 Sol & Winner Verdict: On OpenAI GPT-6.1 Sol ($2/1M input, $10/1M output, $0.1/1M warm cache), 10 unpinned 150K turns cost $3.2000, dropping to $0.6350 in Case A and $0.8915 in Case B. Across every 10-turn 150K coding loop (including output tokens), Claude 3.5 Haiku delivers an additional $0.5803 Case-A cost advantage.
Production Workload TCO: 25,000 MAU • 50M Tokens/Mo (50% Cache Hit) • 2,000 GB Egress
💡 Optimal FinOps Verdict: Deploying Claude 3.5 Haiku saves $132.70/month ($1592/year) at 25,000 MAU & 50M monthly tokens (80% input / 20% output split with 50% prefix cache hit rate).