AI coding agents

Which AI model gives the most useful agent work for the least cost per task?

JSON
Shortlistas of

As of 5 November 2026, no option is proven ahead. 3 options of 57 cannot be separated with the evidence in hand: Claude Opus 5.5 (Max), Gemini 4 Carbon (High) and Claude Sonnet 5.5 (Max).

Options
57
Measured
57
Shortlist
3
Plotted
53
Priced
53
The job

Run an AI agent on real software tasks and judge it by how much the agent's own work was kept and corrected, against what each task costs.

Ranking

57 options measured, shortlisted rows shaded

Options ordered by score, with score interval, cost and price source
#OptionScore 0 to 100Cost per task (median)IntervalPrice page
1Claude Opus 5.5 (Max)anthropicFrontierShortlist90.1$6.82ci9585.8 to 94.3
2Gemini 4 Carbon (High)googleFrontierShortlist83.1$1.73ci9581.5 to 84.7
3Claude Sonnet 5.5 (Max)anthropicShortlist79.2$3.94ci9573.7 to 84.8
4GPT-6 Astra (Max)openai77.4$6.09ci9573.3 to 81.4
5Claude Fable 5.1 (Max)anthropic76.3$6.95ci9572.5 to 80.0
6GPT-6.1 Sol (Max)openaiFrontier74.5$0.955ci9572.3 to 76.7
7Gemini 4 Argon (High)google71.2$0.999ci9569.5 to 72.9
8GPT-6.1 Terra (Max)openaiFrontier70.4$0.788ci9568.0 to 72.7
9Muse Wonder Full (Max)meta69.3Not pricedci9567.3 to 71.2
10Claude Fable 5 (High)anthropic65.6$3.92ci9563.3 to 67.8
11Claude Opus 5 (Max)anthropic65.2$5.62ci9562.7 to 67.7
12GPT-6 Sol (Max)openai63.9$1.74ci9560.7 to 67.1
13Kimi K3.1 Pro (Max)moonshot59.4$1.47ci9556.8 to 62.0
14GPT-5.6 Sol (xHigh)openai59.1$1.73ci9557.0 to 61.2
15Claude Sonnet 5 (High)anthropic55.7$1.11ci9553.3 to 58.1
16Grok 4.7 (xHigh)xai55.3$2.61ci9552.4 to 58.2
17Gemini 3.8 Flash (High)googleFrontier55.1$0.758ci9553.5 to 56.8
18Muse Wonder (Max)meta55.0$1.43ci9552.3 to 57.8
19Muse Spark 1.3 (Max)metaFrontier54.9$0.449ci9553.2 to 56.5
20MiMo-V2.6-ProxiaomiFrontier54.9$0.156ci9553.1 to 56.7
21DeepSeek-V4.1-Flash-20261017 (Max)deepseek54.3$0.177ci9553.1 to 55.4
22GPT-6 Luna (Max)openaiFrontier53.8$0.0914ci9553.0 to 54.7
23GLM-5.3 (Max)zai52.3$1.14ci9550.7 to 53.9
24Hy4 previewtencent51.9$0.444ci9550.5 to 53.3
25Kimi K3 (Max)moonshot51.7$1.12ci9550.6 to 52.9
26GLM-5.2 (Max)zai51.5$1.09ci9550.0 to 53.0
27Claude Haiku 5.5 (High)anthropic51.3$0.0964ci9549.3 to 53.4
28MiMo-V2.6-FlashxiaomiFrontier50.9$0.0713ci9548.8 to 53.0
29Qwen3.8-Maxalibaba50.8$1.35ci9549.5 to 52.1
30Grok 4.6 (xHigh)xai50.6$1.69ci9548.4 to 52.9
31DeepSeek-V4-Pro (High, 20260813)deepseek49.4Not pricedci9546.0 to 52.8
32GPT-5.6 Terra (xHigh)openai47.0$0.606ci9545.4 to 48.5
33Gemini 3.7 Flash (High)google46.7$0.589ci9545.0 to 48.5
34GPT-6 Luna (Medium)openaiFrontier46.1$0.0270ci9545.0 to 47.3
35GLM-5.3-Flashzai45.0$0.160ci9543.6 to 46.4
36Step 5 Previewstepfun44.9$0.631ci9542.1 to 47.7
37MiniMax-M3.1-Flashminimax43.6$0.242ci9540.4 to 46.7
38Qwen3.8-27Balibaba41.4$0.430ci9539.7 to 43.1
39Qwen3.8-Flash-Nextalibaba41.3$0.221ci9539.9 to 42.8
40Gemini 3.1 Pro Previewgoogle40.8$0.633ci9538.0 to 43.5
41Beam 1.0 501B A23Breflection40.6Not pricedci9535.5 to 45.7
42GPT-6 Luna (Low)openaiFrontier38.3$0.0105ci9536.8 to 39.7
43Mistral Large 4mistral37.2$0.446ci9533.0 to 41.4
44Qwen3.7-Maxalibaba36.7$0.353ci9534.3 to 39.1
45Qwen3.7-Plusalibaba35.3$0.141ci9532.0 to 38.5
46Hy3tencent34.9$0.0733ci9532.1 to 37.8
47Muse Spark 1.1meta34.6$0.372ci9533.3 to 36.0
48Muse Spark 1.2 (xHigh)meta34.5$0.439ci9532.8 to 36.2
49MiMo-V2.5-Proxiaomi32.0$0.0768ci9529.9 to 34.0
50Spark-X2.6synlan30.0$0.0978ci9527.0 to 33.0
51MiniMax-M3minimax29.2$0.235ci9526.8 to 31.5
52Mistral Medium 3.5mistral23.6$0.470ci9520.2 to 27.0
53Nemotron 3 Ultranvidia18.8$0.150ci9512.4 to 25.2
54NVIDIA-Nemotron-3.5-Super-VL-120B-A12B (NVFP4)nvidia18.2Not pricedci9516.2 to 20.1
55Inklingthinky17.8$0.332ci9514.9 to 20.8
56Inkling-Smallthinky16.2$0.188ci9512.5 to 19.9
57Solar Pro 4upstage8.1$0.0536ci953.9 to 12.3

Order is by score, highest first. Intervals overlap, so neighbouring ranks do not differ with certainty. Cost is in USD per task (median); bars start at zero. Interval: ci95, built from 95% confidence intervals given by the source.

Price against performance

Score against median cost per task, log scale

Score against median cost per task53 options plotted by median cost per task and score. 11 are on the efficient frontier: GPT-6 Luna (Low), GPT-6 Luna (Medium), MiMo-V2.6-Flash, GPT-6 Luna (Max), MiMo-V2.6-Pro, Muse Spark 1.3 (Max), Gemini 3.8 Flash (High), GPT-6.1 Terra (Max), GPT-6.1 Sol (Max), Gemini 4 Carbon (High), Claude Opus 5.5 (Max). 4 are not plotted because a coordinate is unknown. The same numbers are in the ranking and the cost table.020406080100$0.01$0.02$0.05$0.1$0.2$0.5$1$2$5$10USD per task (median), log scaleScore, 0 to 100Claude Fable 5.1 (Max). Score 76.3, interval 72.5 to 80.0 (ci95). Cost $6.95 per task (median).Claude Fable 5 (High). Score 65.6, interval 63.3 to 67.8 (ci95). Cost $3.92 per task (median).Claude Haiku 5.5 (High). Score 51.3, interval 49.3 to 53.4 (ci95). Cost $0.0964 per task (median).Claude Opus 5 (Max). Score 65.2, interval 62.7 to 67.7 (ci95). Cost $5.62 per task (median).Claude Sonnet 5 (High). Score 55.7, interval 53.3 to 58.1 (ci95). Cost $1.11 per task (median).DeepSeek-V4.1-Flash-20261017 (Max). Score 54.3, interval 53.1 to 55.4 (ci95). Cost $0.177 per task (median).Gemini 3.1 Pro Preview. Score 40.8, interval 38.0 to 43.5 (ci95). Cost $0.633 per task (median).Gemini 3.7 Flash (High). Score 46.7, interval 45.0 to 48.5 (ci95). Cost $0.589 per task (median).Gemini 4 Argon (High). Score 71.2, interval 69.5 to 72.9 (ci95). Cost $0.999 per task (median).GLM-5.2 (Max). Score 51.5, interval 50.0 to 53.0 (ci95). Cost $1.09 per task (median).GLM-5.3-Flash. Score 45.0, interval 43.6 to 46.4 (ci95). Cost $0.160 per task (median).GLM-5.3 (Max). Score 52.3, interval 50.7 to 53.9 (ci95). Cost $1.14 per task (median).GPT-5.6 Sol (xHigh). Score 59.1, interval 57.0 to 61.2 (ci95). Cost $1.73 per task (median).GPT-5.6 Terra (xHigh). Score 47.0, interval 45.4 to 48.5 (ci95). Cost $0.606 per task (median).GPT-6 Astra (Max). Score 77.4, interval 73.3 to 81.4 (ci95). Cost $6.09 per task (median).GPT-6 Sol (Max). Score 63.9, interval 60.7 to 67.1 (ci95). Cost $1.74 per task (median).Grok 4.6 (xHigh). Score 50.6, interval 48.4 to 52.9 (ci95). Cost $1.69 per task (median).Grok 4.7 (xHigh). Score 55.3, interval 52.4 to 58.2 (ci95). Cost $2.61 per task (median).Hy3. Score 34.9, interval 32.1 to 37.8 (ci95). Cost $0.0733 per task (median).Hy4 preview. Score 51.9, interval 50.5 to 53.3 (ci95). Cost $0.444 per task (median).Inkling. Score 17.8, interval 14.9 to 20.8 (ci95). Cost $0.332 per task (median).Inkling-Small. Score 16.2, interval 12.5 to 19.9 (ci95). Cost $0.188 per task (median).Kimi K3.1 Pro (Max). Score 59.4, interval 56.8 to 62.0 (ci95). Cost $1.47 per task (median).Kimi K3 (Max). Score 51.7, interval 50.6 to 52.9 (ci95). Cost $1.12 per task (median).MiMo-V2.5-Pro. Score 32.0, interval 29.9 to 34.0 (ci95). Cost $0.0768 per task (median).MiniMax-M3. Score 29.2, interval 26.8 to 31.5 (ci95). Cost $0.235 per task (median).MiniMax-M3.1-Flash. Score 43.6, interval 40.4 to 46.7 (ci95). Cost $0.242 per task (median).Mistral Large 4. Score 37.2, interval 33.0 to 41.4 (ci95). Cost $0.446 per task (median).Mistral Medium 3.5. Score 23.6, interval 20.2 to 27.0 (ci95). Cost $0.470 per task (median).Muse Spark 1.1. Score 34.6, interval 33.3 to 36.0 (ci95). Cost $0.372 per task (median).Muse Spark 1.2 (xHigh). Score 34.5, interval 32.8 to 36.2 (ci95). Cost $0.439 per task (median).Muse Wonder (Max). Score 55.0, interval 52.3 to 57.8 (ci95). Cost $1.43 per task (median).Nemotron 3 Ultra. Score 18.8, interval 12.4 to 25.2 (ci95). Cost $0.150 per task (median).Qwen3.7-Max. Score 36.7, interval 34.3 to 39.1 (ci95). Cost $0.353 per task (median).Qwen3.7-Plus. Score 35.3, interval 32.0 to 38.5 (ci95). Cost $0.141 per task (median).Qwen3.8-27B. Score 41.4, interval 39.7 to 43.1 (ci95). Cost $0.430 per task (median).Qwen3.8-Flash-Next. Score 41.3, interval 39.9 to 42.8 (ci95). Cost $0.221 per task (median).Qwen3.8-Max. Score 50.8, interval 49.5 to 52.1 (ci95). Cost $1.35 per task (median).Solar Pro 4. Score 8.1, interval 3.9 to 12.3 (ci95). Cost $0.0536 per task (median).Spark-X2.6. Score 30.0, interval 27.0 to 33.0 (ci95). Cost $0.0978 per task (median).Step 5 Preview. Score 44.9, interval 42.1 to 47.7 (ci95). Cost $0.631 per task (median).Claude Opus 5.5 (Max). Score 90.1, interval 85.8 to 94.3 (ci95). Cost $6.82 per task (median). On the frontier. On the shortlist.Claude Sonnet 5.5 (Max). Score 79.2, interval 73.7 to 84.8 (ci95). Cost $3.94 per task (median). On the shortlist.Gemini 3.8 Flash (High). Score 55.1, interval 53.5 to 56.8 (ci95). Cost $0.758 per task (median). On the frontier.Gemini 4 Carbon (High). Score 83.1, interval 81.5 to 84.7 (ci95). Cost $1.73 per task (median). On the frontier. On the shortlist.GPT-6.1 Sol (Max). Score 74.5, interval 72.3 to 76.7 (ci95). Cost $0.955 per task (median). On the frontier.GPT-6.1 Terra (Max). Score 70.4, interval 68.0 to 72.7 (ci95). Cost $0.788 per task (median). On the frontier.GPT-6 Luna (Low). Score 38.3, interval 36.8 to 39.7 (ci95). Cost $0.0105 per task (median). On the frontier.GPT-6 Luna (Max). Score 53.8, interval 53.0 to 54.7 (ci95). Cost $0.0914 per task (median). On the frontier.GPT-6 Luna (Medium). Score 46.1, interval 45.0 to 47.3 (ci95). Cost $0.0270 per task (median). On the frontier.MiMo-V2.6-Flash. Score 50.9, interval 48.8 to 53.0 (ci95). Cost $0.0713 per task (median). On the frontier.MiMo-V2.6-Pro. Score 54.9, interval 53.1 to 56.7 (ci95). Cost $0.156 per task (median). On the frontier.Muse Spark 1.3 (Max). Score 54.9, interval 53.2 to 56.5 (ci95). Cost $0.449 per task (median). On the frontier.GPT-6 Luna (Low)MiMo-V2.6-FlashMiMo-V2.6-ProMuse Spark 1.3 (Max)GPT-6.1 Terra (Max)GPT-6.1 Sol (Max)Gemini 4 Carbon (High)Claude Opus 5.5 (Max)
  • Frontier: no other option is both cheaper and scores higher
  • Other option
  • Ring: on the shortlist, not separable with certainty
  • Line: score interval, ci95 (built from 95% confidence intervals given by the source)
53 plotted. Better is up and to the left. The frontier is where nothing else is both cheaper and higher; it is not a recommendation.
4 options not plotted: a coordinate is unknown
  • Beam 1.0 501B A23B: Cost unknown
  • DeepSeek-V4-Pro (High, 20260813): Cost unknown
  • Muse Wonder Full (Max): Cost unknown
  • NVIDIA-Nemotron-3.5-Super-VL-120B-A12B (NVFP4): Cost unknown

Cost for this job

Date read and source for all 57 options

Median cost per task, in USD per task (median), cheapest first within each group.

Workload and assumptions

One task. Cost is the median cost per task that Arena reports for the model.

Cost for this job, by option, with date read and source
OptionCostPrice readSourceNotes
Cost 53
GPT-6 Luna (Low)openai
$0.0105
2 days old
GPT-6 Luna (Medium)openai
$0.0270
2 days old
Solar Pro 4upstage
$0.0536
2 days old
MiMo-V2.6-Flashxiaomi
$0.0713
2 days old
Hy3tencent
$0.0733
2 days old
MiMo-V2.5-Proxiaomi
$0.0768
2 days old
GPT-6 Luna (Max)openai
$0.0914
2 days old
Claude Haiku 5.5 (High)anthropic
$0.0964
2 days old
Spark-X2.6synlan
$0.0978
2 days old
Qwen3.7-Plusalibaba
$0.141
2 days old
Nemotron 3 Ultranvidia
$0.150
2 days old
MiMo-V2.6-Proxiaomi
$0.156
2 days old
GLM-5.3-Flashzai
$0.160
2 days old
DeepSeek-V4.1-Flash-20261017 (Max)deepseek
$0.177
2 days old
Inkling-Smallthinky
$0.188
2 days old
Qwen3.8-Flash-Nextalibaba
$0.221
2 days old
MiniMax-M3minimax
$0.235
2 days old
MiniMax-M3.1-Flashminimax
$0.242
2 days old
Inklingthinky
$0.332
2 days old
Qwen3.7-Maxalibaba
$0.353
2 days old
Muse Spark 1.1meta
$0.372
2 days old
Qwen3.8-27Balibaba
$0.430
2 days old
Muse Spark 1.2 (xHigh)meta
$0.439
2 days old
Hy4 previewtencent
$0.444
2 days old
Mistral Large 4mistral
$0.446
2 days old
Muse Spark 1.3 (Max)meta
$0.449
2 days old
Mistral Medium 3.5mistral
$0.470
2 days old
Gemini 3.7 Flash (High)google
$0.589
2 days old
GPT-5.6 Terra (xHigh)openai
$0.606
2 days old
Step 5 Previewstepfun
$0.631
2 days old
Gemini 3.1 Pro Previewgoogle
$0.633
2 days old
Gemini 3.8 Flash (High)google
$0.758
2 days old
GPT-6.1 Terra (Max)openai
$0.788
2 days old
GPT-6.1 Sol (Max)openai
$0.955
2 days old
Gemini 4 Argon (High)google
$0.999
2 days old
GLM-5.2 (Max)zai
$1.09
2 days old
Claude Sonnet 5 (High)anthropic
$1.11
2 days old
Kimi K3 (Max)moonshot
$1.12
2 days old
GLM-5.3 (Max)zai
$1.14
2 days old
Qwen3.8-Maxalibaba
$1.35
2 days old
Muse Wonder (Max)meta
$1.43
2 days old
Kimi K3.1 Pro (Max)moonshot
$1.47
2 days old
Grok 4.6 (xHigh)xai
$1.69
2 days old
GPT-5.6 Sol (xHigh)openai
$1.73
2 days old
Gemini 4 Carbon (High)google
$1.73
2 days old
GPT-6 Sol (Max)openai
$1.74
2 days old
Grok 4.7 (xHigh)xai
$2.61
2 days old
Claude Fable 5 (High)anthropic
$3.92
2 days old
Claude Sonnet 5.5 (Max)anthropic
$3.94
2 days old
Claude Opus 5 (Max)anthropic
$5.62
2 days old
GPT-6 Astra (Max)openai
$6.09
2 days old
Claude Opus 5.5 (Max)anthropic
$6.82
2 days old
Claude Fable 5.1 (Max)anthropic
$6.95
2 days old
No cost available 4
Beam 1.0 501B A23Breflection
Unknown
Not read
No source
1 note
  • No price in the source for this option.
DeepSeek-V4-Pro (High, 20260813)deepseek
Unknown
Not read
No source
1 note
  • No price in the source for this option.
Muse Wonder Full (Max)meta
Unknown
Not read
No source
1 note
  • No price in the source for this option.
NVIDIA-Nemotron-3.5-Super-VL-120B-A12B (NVFP4)nvidia
Unknown
Not read
No source
1 note
  • No price in the source for this option.

What evidence would settle it

The three conditions and what is missing
  • Claude Opus 5.5 (Max): another independent origin or repeats (interval 8.4 points wide), metric Agent Arena score (net improvement over a uniform baseline).
  • Claude Sonnet 5.5 (Max): another independent origin or repeats (interval 11.1 points wide), metric Agent Arena score (net improvement over a uniform baseline).
  • Gemini 4 Carbon (High): another independent origin or repeats (interval 3.2 points wide), metric Agent Arena score (net improvement over a uniform baseline).

The three conditions for naming a best option

  1. The leader's lower bound must exceed every other option's upper bound by at least 3 points. Not met: the closest gap is 1.0 points (Claude Opus 5.5 (Max) against Claude Sonnet 5.5 (Max)).
  2. Every critical metric must come from two independent origins, or from one auditable test of our own. Not met: 1 origin and no auditable own test for Claude Opus 5.5 (Max).
  3. The price must be verified within 30 days. Met: read 2 days before this date.

Sources and limits

1 source, the method notes and this board as JSON

Scores on this board come from Arena Leaderboard Dataset (lmarena-ai/leaderboard-dataset). We rescale them to a 0 to 100 scale against fixed anchors (Agent Arena score (net improvement over a uniform baseline): -0.25 counts as 0 and 0.25 counts as 100), so a new option never moves another option's score. The licence and our changes are stated in the data credit at the foot of this page.

Notes on this board. Only one origin (Arena) is used, so no board entry can be named Best until a second independent origin or an own test exists. Arena's IPS score comes from agent sessions of its own users; it is not a test of this board's job on your code.

Scores are on a 0 to 100 scale against editorial anchors that are not yet validated. Prices are for the workload above and change without notice. Evidence older than 60 days is left out, and prices older than 30 days are flagged.

This board as JSON, with every input id, anchor and weight.

Data credits

Arena data: Arena (lmarena-ai), dataset lmarena-ai/leaderboard-dataset, https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Changes by Inadviser: the Arena scores (the Agent Arena IPS score and the text, text-to-image, text-to-video and search ratings) are rescaled to a 0-100 utility against fixed anchors set by Inadviser; the confidence interval and the observation or vote count are carried over; only a selection of models is shown on each board; where a board shows Arena's cost per task, it is shown unchanged. The dataset maintainers' method applies (https://arena.ai/blog/agent-arena-methodology/ for Agent Arena). Arena does not endorse Inadviser.