Tutorials Intermediate
Prompt Cache Retention: Cut OpenAI Bills Up to 90%
Structure prompts, set prompt_cache_retention, and read cached_tokens to slash GPT-5.6 input costs.
8 min read·Kodetra Technologies
4d agoGuides
AI Guides for Builders
How-to content for builders, indie hackers, and AI engineers. Less theory, more shipped code.
Tutorials 
Tutorials Intermediate
Grok 4.5 Tool Loops: Tune Effort and Cache to Cut Cost
Build an agentic Grok 4.5 tool loop in Python: route reasoning_effort and cache to slash cost.
7 min read·Kodetra Technologies
4d ago
Tutorials Intermediate
Gemini 3.5 Pro: Feed a 2M-Token Codebase in One Call
Load a whole repo into Gemini 3.5 Pro's 2M context, query it without RAG, and cache to cut cost.
8 min read·Kodetra Technologies
13d ago
Tutorials Intermediate
Semantic Caching for LLMs: Cut Your Token Bill in Python
Build a semantic cache that reuses answers for similar prompts and slashes LLM API costs.
10 min read·Kodetra Technologies
14d ago
Tutorials Intermediate
Fable 5 Prompt Caching: Slash 1M-Token Codebase Costs
Reuse a huge codebase prefix across every Fable 5 call and pay ~90% less.
8 min read·Kodetra Technologies
28d ago
Tutorials Intermediate
DeepSeek V4 Pro: Cheap 1M-Token Context in Python
Use DeepSeek V4 Pro's auto KV cache to run huge-context jobs for cents.
8 min read·Kodetra Technologies
Jun 13
Tutorials Intermediate
Opus 4.8 Mid-Convo System Messages in Python (Cache-Safe)
Use Opus 4.8 role:system messages mid-conversation to update agent rules without invalidating cache.
10 min read·Kodetra Technologies
May 29
Tutorials Intermediate
Qwen 3.7 Max: Drop-In Anthropic SDK Swap in Python
Point the Anthropic SDK at Qwen 3.7 Max with one base-URL change: 1M context, thinking, caching.
8 min read·Kodetra Technologies
May 27
System Design Advanced
Cache Stampede: Beat the Thundering Herd in Redis
Stop cache stampedes with locking, single-flight, and probabilistic early expiry.
11 min read·Kodetra Technologies
May 22
System Design Intermediate
Hedged Requests: Tame P99 Tail Latency at Scale
Send a backup when the first call is slow. Cut P99 tail latency without overloading services.
9 min read·Kodetra Technologies
May 20
Backend Intermediate
Postgres SKIP LOCKED: A Job Queue Without Redis
Build a reliable production job queue using only Postgres FOR UPDATE SKIP LOCKED.
12 min read·Kodetra Technologies
May 11
System Design Advanced
Saga Pattern: Distributed Transactions Without 2PC
Coordinate multi-service writes with orchestration, choreography, and compensating transactions.
10 min read·Kodetra Technologies
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