Optimal Effort Recipe

Per model: the cheapest effort within 90% of its best FrontierCode 2.0 score, skipping levels a cheaper same-vendor model matches. Full chart: Optimal effort.

Claude Opus 5.5 · Claude Code
Optimal effort
xhigh
Budget effort: medium. Vendor swap: —.
low 14.72 · $0.75 → Claude Haiku 5.5 high 18.64 · $0.14
Optimal xhigh 43.38 · $5.18 (95% score · 40% cost of max)
Budget medium 30.1 · $1.70 (66% score · 13% cost of max)
GPT-6 Astra · Codex
Optimal effort
xhigh
Budget effort: —. Vendor swap: —.
low 31.11 · $2.44 → GPT-6.1 Sol high 34.82 · $0.65
medium 36.75 · $3.49 → GPT-6.1 Sol max 38.95 · $1.03
high 38.31 · $4.28 → GPT-6.1 Sol max 38.95 · $1.03
Optimal xhigh 41.41 · $4.54 (97% score · 68% cost of max)
Claude Sonnet 5.5 · Claude Code
Optimal effort: —
Use Claude Opus 5.5 xhigh
A cheaper Anthropic model matches every level.
max 40.96 · $19.94 → Claude Opus 5.5 xhigh 43.38 · $5.18 (106% score · 26% cost)
GPT-6.1 Sol · Codex
Optimal effort
max
Budget effort: low. Vendor swap: —.
Optimal max 38.95 · $1.03
Budget low 25.6 · $0.34 (66% score · 33% cost of max)
Claude Fable 5.1 · Claude Code
Optimal effort: —
Use Claude Opus 5.5 high
A cheaper Anthropic model matches every level.
xhigh 32.44 · $8.68 → Claude Opus 5.5 high 34.53 · $2.42 (106% score · 28% cost)
Claude Haiku 5.5 · Claude Code
Optimal effort
max
Budget effort: high. Vendor swap: —.
Optimal max 27.72 · $0.37
Budget high 18.64 · $0.14 (67% score · 38% cost of max)
Gemini 4 Argon · Devin CLI
Optimal effort
high
Budget effort: low. Vendor swap: GPT-6.1 Sol low.
Optimal high 26.3 · $6.51
Budget low 21.47 · $3.98 (82% score · 61% cost of high)
Swap GPT-6.1 Sol low 25.6 · $0.34 (97% score · 5% cost of high)
Grok 4.7 · Grok Build
Optimal effort
medium
Budget effort: low. Vendor swap: GPT-6.1 Sol low.
Optimal medium 25.94 · $8.03 (91% score · 56% cost of xhigh)
Budget low 20.8 · $3.87 (73% score · 27% cost of xhigh)
Swap GPT-6.1 Sol low 25.6 · $0.34 (99% score · 4% cost of medium)
Muse Wonder · muse
Optimal effort
medium
Budget effort: low. Vendor swap: Claude Haiku 5.5 xhigh.
Optimal medium 23.14 · $2.53 (95% score · 81% cost of high)
Budget low 21.21 · $1.84 (87% score · 59% cost of high)
Swap Claude Haiku 5.5 xhigh 22.28 · $0.23 (96% score · 9% cost of medium)
GPT-6 Luna · Codex
Optimal effort
max
Budget effort: medium. Vendor swap: —.
Optimal max 21.87 · $0.17
Budget medium 15.97 · $0.09 (73% score · 53% cost of max)
Mistral Large 4 · Mistral Vibe
Optimal effort
max
Budget effort: —. Vendor swap: GPT-6 Luna max.
Optimal max 19.65 · $1.55
Swap GPT-6 Luna max 21.87 · $0.17 (111% score · 11% cost of max)
DeepSeek V4.1 Flash · Devin CLI
Optimal effort
high
Budget effort: low. Vendor swap: GPT-6 Luna xhigh.
Optimal high 18.21 · $0.27 (94% score · 71% cost of max)
Budget low 15.96 · $0.21 (83% score · 54% cost of max)
Swap GPT-6 Luna xhigh 18.44 · $0.13 (101% score · 48% cost of high)
Kimi K3 · Devin CLI
Optimal effort
high
Budget effort: low. Vendor swap: GPT-6 Luna xhigh.
Optimal high 17.74 · $4.47
Budget low 11.1 · $2.98 (63% score · 67% cost of high)
Swap GPT-6 Luna xhigh 18.44 · $0.13 (104% score · 3% cost of high)
GLM-5.3 · Devin CLI
Optimal effort
high
Budget effort: —. Vendor swap: GPT-6 Luna medium.
low 14.37 · $3.19 → GLM-5.3 Flash max 14.18 · $0.79
Optimal high 16.84 · $5.18 (95% score · 69% cost of max)
Swap GPT-6 Luna medium 15.97 · $0.09 (95% score · 2% cost of high)
GLM-5.3 Flash · Devin CLI
Optimal effort
max
Budget effort: high. Vendor swap: GPT-6 Luna medium.
Optimal max 14.18 · $0.79
Budget high 12.41 · $0.58 (88% score · 74% cost of max)
Swap GPT-6 Luna medium 15.97 · $0.09 (113% score · 12% cost of max)
Inkling Small · Devin CLI
Optimal effort
max
Budget effort: —. Vendor swap: GPT-6 Luna low.
Optimal max 3.21 · $3.68
Swap GPT-6 Luna low 4.05 · $0.02 (126% score · 1% cost of max)
Beam 1.0 · Devin CLI
Optimal effort
max
Budget effort: high. Vendor swap: GPT-6 Luna low.
Optimal max 2.9 · $1.30
Budget high 1.74 · $0.61 (60% score · 47% cost of max)
Swap GPT-6 Luna low 4.05 · $0.02 (140% score · 2% cost of max)
Data from https://cognition.com/frontiercode on 2026-10-28.