scientiacapital Initialize tracking:
mkdir -p ~/.claude
echo '{"date":"'$(date +%Y-%m-%d)'","spent":0,"budget_monthly":100,"budget_daily":5}' > ~/.claude/daily-cost.json
Model Rates (Current)
| Model | Input/1M tokens | Output/1M tokens | Typical Use |
|---|---|---|---|
| Claude Opus 4.6 | $5.00 | $25.00 | Architecture, complex reasoning |
| Claude Sonnet 4.6 | $3.00 | $15.00 | Code generation, standard tasks |
| Claude Haiku 4.5 | $1.00 | $5.00 | Search, classification, simple |
| DeepSeek V3 | $0.27 | $1.10 | Bulk processing |
| GROQ Llama 3.3 70B | $0.59 | $0.79 | Fast inference |
| Voyage Embeddings | $0.10 | — | Embeddings |
v1.1.0 pricing changes: Opus $15/$75 → $5/$25 (70% cheaper with Opus 4.6). Haiku $0.25/$1.25 → $1/$5 (Haiku 3 → 4.5, 4x more expensive). Sonnet $3/$15 unchanged (model upgraded 4.5 → 4.6).
Budget Configuration
~/.claude/daily-cost.json
{
"date": "2026-02-07",
"spent": 2.40,
"budget_monthly": 100,
"budget_daily": 5,
"alerts": {
"info": 0.5,
"warn": 0.8,
"block": 0.95
}
}
Alert Thresholds
| Threshold | % Budget | Action |
|---|---|---|
| Info | 50% | Display: "50% of monthly budget used" |
| Warn | 80% | Yellow alert: "⚠️ 80% budget — consider model downgrade" |
| Block | 95% | Red alert: "🛑 95% budget — require explicit override to continue" |
Cost Optimization Strategies
1. Model Routing (biggest impact)
| Task | Expensive | Optimized | Savings |
|---|---|---|---|
| File search | Sonnet ($3/1M) | Haiku ($1/1M) | 67% |
| Code review | Sonnet ($3/1M) | Haiku ($1/1M) | 67% |
| Classification | Sonnet ($3/1M) | Haiku ($1/1M) | 67% |
| Bulk processing | Sonnet ($3/1M) | DeepSeek ($0.27/1M) | 91% |
Rule: If the task doesn't generate code, use Haiku. If it doesn't need Claude, use DeepSeek.
2. Context Management
- Keep SKILL.md files under 200 lines (progressive disclosure)
- Load reference files only when needed
- Use
Exploreagent withhaikumodel for codebase search - Avoid reading entire files — use Grep to find specific lines
3. Task Batching
- Group related searches into one Explore agent call
- Use parallel subagents (haiku) instead of serial sonnet calls
- Combine file reads when possible
Tracking Commands
Daily Spend Check
cat ~/.claude/daily-cost.json | jq '{date, spent, remaining: (.budget_daily - .spent), pct: ((.spent / .budget_monthly) * 100 | floor)}'
Weekly Report
# Aggregate daily logs
cat ~/.claude/cost-log.jsonl | jq -s 'group_by(.phase) | map({phase: .[0].phase, total: (map(.est_cost) | add), count: length})'
Monthly Summary
cat ~/.claude/cost-log.jsonl | jq -s '{
total: (map(.est_cost) | add),
by_model: (group_by(.model) | map({model: .[0].model, cost: (map(.est_cost) | add)})),
by_phase: (group_by(.phase) | map({phase: .[0].phase, cost: (map(.est_cost) | add)}))
}'
Integration Points
| System | How |
|---|---|
| workflow-orchestrator | Cost gate checks budget before workflows |
| subagent-teams | Model selection uses cost tiers |
| agent-capability-matrix | Includes model recommendations |
| portfolio-artifact | Reports cost-per-feature metrics |
| End Day protocol | Logs daily costs, updates MTD |
| TaskCreate/TaskUpdate | Zero API cost — local UI tool for progress tracking |
| TeamCreate/SendMessage | Zero API cost — local coordination (but spawned agents incur model costs) |
Storage
~/.claude/
├── daily-cost.json # Current day's budget + spend
├── cost-log.jsonl # Append-only operation log
└── portfolio/
└── daily-metrics.jsonl # Includes cost-per-feature
Deep dive: See reference/cost-tracking-guide.md, reference/budget-templates.md
Emit Outcome Sidecar
As the final step, write to ~/.claude/skill-analytics/last-outcome-cost-metering.json:
{"ts":"[UTC ISO8601]","skill":"cost-metering","version":"1.1.0","variant":"default",
"status":"[success|partial|error]","runtime_ms":[estimated ms from start],
"metrics":{"sessions_tracked":[n],"total_cost_usd":[n],"budget_alerts":[n]},
"error":null,"session_id":"[YYYY-MM-DD]"}
Use status "partial" if some stages failed but results were produced. Use "error" only if no output was generated.