Claude Opus 4.8 설정 가이드: 최소 비용으로 최대 품질을 얻는 방법 (상세 설정 포함)

1Model:           claude-opus-4-8
2Price:           $5 / $25 per million tokens (same as 4.7)
3Fast mode:       2.5x speed, $10 / $50 (3x cheaper than before)
4Context window:  1,000,000 tokens (unchanged)
5Max output:      128,000 tokens (unchanged)
6SWE-bench:       88.6% (up from 87.6%)
7Code flaws:      4x fewer unflagged bugs than 4.7
8Honesty:         0% uncritically reporting flawed results

1Low     → 빠르고 간단한 작업, 최소 토큰 사용
2Medium  → 일상적인 코딩, 균형 잡힌 수준
3High    → 기본값, 견고한 추론 (4.7 에서 항상 사용하던 수준)
4Max     → 가장 깊은 추론, 최대 토큰 사용

1/effort low       # 빠른 질문, 포맷팅
2/effort high      # 일상적인 코딩
3/effort max       # 복잡한 아키텍처 결정
4/effort ultracode # 최대 추론 + 자동 워크플로우 오케스트레이션

1# Set default in your terminal config
2export CLAUDE_CODE_DEFAULT_EFFORT=high
3
4# Override per task when needed
5/effort max  # for the hard stuff
6/effort low  # for "what does this function return?"

1Standard Opus 4.8:  $5 / $25 per million tokens
2Fast mode Opus 4.8: $10 / $50 per million tokens (2.5x speed)
3
4Previous fast mode:  $30 / $150 per million tokens
5Price drop:          3x cheaper

1/fast    # toggle fast mode on

1Use fast mode for:
2
3- Large refactoring across many files (speed > depth)
4- Code generation from specs (pattern matching, not reasoning)
5- Documentation writing
6- Test generation for existing code
7
8Use standard mode for:
9
10- Complex debugging
11- Architecture decisions
12- Security review
13- Anything where thinking quality matters more than speed

1# Trigger a workflow
2/effort ultracode
3
4# Or describe a large task naturally
5"Audit every API endpoint under src/routes/ for missing auth checks"

1What dynamic workflows handle:
2
3- Migration touching 200+ files
4- Full codebase security audit
5- Test suite generation for an entire project
6- Large-scale refactoring
7- Deep research across multiple codebases
8
9What they don't handle well:
10
11- Simple bug fixes (overkill)
12- Single-file edits
13- Quick questions

1claude -p "audit the entire codebase" --max-budget-usd 50.00

1Task                          Model      Effort    Mode
2─────────────────────────────────────────────────────────
3Quick question                Haiku      Low       Standard
4Format this code              Sonnet     Low       Standard
5Write a test                  Sonnet     Medium    Standard
6Daily coding                  Opus 4.8   High      Standard
7Code review                   Opus 4.8   High      Standard
8Large refactor (speed)        Opus 4.8   High      Fast
9Complex architecture          Opus 4.8   Max       Standard
10Full codebase audit           Opus 4.8   Ultracode Dynamic
11Migration (200+ files)        Opus 4.8   Ultracode Dynamic

1Before (everything on Opus High, standard):
2~$400-600/mo for heavy usage
3
4After (routed correctly):
5Haiku for quick questions:     $5/mo
6Sonnet for daily tasks:        $40/mo
7Opus High for complex work:    $80/mo
8Opus Fast for large refactors: $30/mo
9Dynamic for big audits:        $50/mo (occasional)
10─────────────────────────────────────────
11Total:                         ~$205/mo
12
13Savings:                       ~50%
14Same output quality on every task that matters.

1# Add to ~/.zshrc or ~/.bashrc
2export CLAUDE_CODE_DEFAULT_EFFORT=high
3export CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING=1
4export CLAUDE_CODE_SUBAGENT_MODEL="claude-sonnet-4-5-20250929"
5export ANTHROPIC_MODEL="claude-opus-4-8"

1{
2  "permissions": {
3    "allow": [
4      "Read", "Glob", "Grep", "LS", "Edit", "MultiEdit",
5      "Write(src/**)", "Write(tests/**)", "Write(docs/**)",
6      "Bash(npm run *)", "Bash(npm test *)", "Bash(npx tsc *)",
7      "Bash(npx prettier *)", "Bash(npx eslint *)",
8      "Bash(git status)", "Bash(git diff *)", "Bash(git log *)",
9      "Bash(git add *)", "Bash(git commit *)"
10    ],
11    "deny": [
12      "Read(**/.env*)", "Read(**/.ssh/**)", "Read(**/.aws/**)",
13      "Bash(rm -rf *)", "Bash(sudo *)", "Bash(git push *)"
14    ],
15    "defaultMode": "acceptEdits"
16  },
17  "hooks": {
18    "PostToolUse": [
19      {
20        "matcher": "Write(*.ts)",
21        "hooks": [
22          { "type": "command", "command": "npx prettier --write $file" },
23          { "type": "command", "command": "npx tsc --noEmit 2>&1 | head -20" }
24        ]
25      }
26    ],
27    "Stop": [
28      {
29        "hooks": [
30          { "type": "command", "command": "npm test 2>&1 | tail -10; echo \"Exit: $?\"" }
31        ]
32      }
33    ]
34  }
35}

1# Start of day: default effort
2/effort high
3
4# Quick questions
5/effort low
6"what does this function return?"
7/effort high
8
9# Large refactor (speed matters)
10/fast
11"refactor the entire auth module to use the new session handler"
12
13# Full codebase audit (dynamic workflow)
14/effort ultracode
15"audit every endpoint for missing auth checks"
16
17# Model switching
18/model sonnet    # for simple tasks
19/model opus      # for complex work
20/model haiku     # for throwaway questions