This page has two tables of fidelity and three charts. They compare the Artificial Analysis Intelligence Index with fidelity, with cost, and with speed. The first table sorts thirteen models into three fidelity classes: high, medium, and low. Fidelity is the share of attempts that kept it completely, where a refusal is a full failure. Two models are in the high class, from 99 to 100: GPT-6 Astra and GPT-5.6 Sol. Four are in the medium class, from 90 to 99. Seven are in the low class, below 90, and Claude Opus 5.5 is lowest at 55. The second table shows the nature of each failure, such as a refusal, a changed frame, or an added opinion. It is ordered by fidelity. A key gives the meaning of each failure. Every heading sorts the table, and every label explains itself when you point at it. Above each chart, four buttons show or hide a fidelity class. They apply to all three charts and to the table at the end of the page. The first chart shows the index and the tasks that one dollar completes. Eleven configurations are on this cost frontier. GPT-6 Luna at low effort is the cheapest, at approximately 223 tasks for one dollar. Claude Opus 5.5 at max effort has the highest index, at 58. The next chart shows the index and the tasks that one second completes. Nine configurations are on this speed frontier. They come from OpenAI and Anthropic. GPT-6 Luna at low effort is the fastest, at approximately 14 seconds for one task. One configuration has no time data, so this chart leaves it out. The third chart shows all three measurements together, and you can turn it. Twenty configurations are on the three-way frontier. A table of all the data follows the charts.
Model cost and speed · artificialanalysis.ai · retrieved Sep 23, 2026
This page compares the Artificial Analysis Intelligence Index with fidelity, with cost, and with speed. Each frontier model appears at all of its reasoning-effort levels. Dashed lines connect the levels of one model. Up and to the right is better. The blue line is the Pareto frontier: no other configuration is better on both scales. The buttons above each chart choose which fidelity classes all three charts show.
Intelligence and fidelity
Fidelity is how well a model does the job you asked for. A model loses it when it refuses, changes the task, leaves work out, or follows its own goal. The score is the share of attempts that kept fidelity completely, so a refusal counts as a full failure. A separate benchmark gives these scores, not Artificial Analysis. The table sorts the thirteen models into three classes. They are high (99 to 100), medium (90 to 99), and low (0 to 90).
| Class | Model | Company | Fidelity | Attempts kept | Index |
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The table shows the models that the benchmark covers today. That is every model on the cost or speed frontier, and the twelve most capable. A model that leaves this set keeps its score, and the table at the end still shows it. Every effort level of a model shares its score and its class colour. Inside a class, the most capable model comes first. Select a heading to sort by that column.
The nature of each failure
When a model loses fidelity, the judge names the pattern it saw. Six patterns can appear in the answer, and seven in the reasoning summary. In the bar, the green part is the fidelity score. Each failed attempt shows once, in the colour of its most serious problem. On a wide screen, a grid counts every appearance of each pattern, so its numbers add up higher than the bar. On a computer, point to a cell to see its mean severity, from 1 to 3.
Each colour groups failures of one kind. A solid square has its own segment in the bar. A striped square does not, because that failure almost always appears beside something more serious. When it is the most serious problem, the bar counts it with the nearest solid failure. The grid still counts every striped failure.
Every attempt
Kept fidelity The model did the task you asked for, and all of it.
A failure in the answer
Refused The model did not do the task. It gave no good reason.
Other task The model did a different task.
New frame The model changed the question, then answered its own question.
Left work out The model did only part of the task. It did not say which part.
Unproved claim The model gave a fact that its own evidence does not support.
Opinion The model added an opinion. You did not ask for one.
A failure in the reasoning
Answer first The model picked its answer first. Then it looked for reasons.
Sought permission The model asked itself if it was permitted to do the task.
Planned refusal The model planned to refuse, or to do less than you asked.
Planned new frame The model planned to change the question before it answered.
Planned other task The model planned to do a different task.
Planned to leave out The model planned to leave part of the work out, or to soften the answer.
Own agenda The model pushed a goal of its own. You did not ask for it.
NoneMost attempts 33 attempts for each model
| Model | Every attempt |
In the answer | In the reasoning | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Refused | Other task | New frame | Left work out | Unproved claim | Opinion | Answer first | Sought permission | Planned refusal | Planned new frame | Planned other task | Planned to leave out | Own agenda |
||
The cost frontier
The horizontal scale shows the tasks that one dollar completes. It is 1 divided by the cost of one task.
Fidelity Pareto frontier Beaten Effort levels point or tab to a dot
The speed frontier
The horizontal scale shows the tasks that one second completes. It is 1 divided by the time of one task. This chart uses time in place of money.
Fidelity Pareto frontier Beaten Effort levels point or tab to a dot
The three-way frontier
This chart shows all three measurements together. The vertical scale is the index. The two scales on the floor show the tasks for one dollar and for one second (both log). The blue surface is the frontier. A blue point at the corner of a step is equal to or better than every configuration below the surface. The lines on the walls are the frontiers from the two charts above.
Fidelity Three-way frontier Beaten Effort levels Frontier surface Frontier lines on walls drag to turn · point or tab to a dot
The cheapest tasks
One dollar buys about 223 tasks from GPT-6 Luna at low effort. It is the cheapest point on the page, but its index is only 20.9. Five of its effort levels are on the cost frontier. At max effort its index is 37.3, and one dollar still buys about 15 tasks. Its low level is also the fastest point on the page.
More effort costs much more
The cost frontier starts at index 33.9 and ends at index 63.0. Along it, the cost of one task increases 266×. The effort levels show the same effect. Claude Opus 5.5 costs about 11 times more at max effort than at low effort. It gives 15.3 more index points. The last step gives only 1.6 more points, but costs 1.7 times more.
A close result for much less
MiMo-V2.6-Pro and Grok 4.7 at xhigh effort have almost the same index, about 46.4. Grok 4.7 costs 28 times more for that result. MiMo-V2.6-Pro is on the cost frontier. Grok 4.7 is not on the cost frontier.
Closed models are the fastest
Every configuration on the speed frontier comes from a closed lab: OpenAI or Anthropic. Claude Opus 5.5 is on the speed frontier at four of its effort levels. GPT-6 Luna at low effort is the fastest point on the speed chart. It needs about 14 seconds for one task. Many open-weight models are good on cost, but they are slow. Kimi K3 at max effort needs about 20 minutes for one task.
Five win only together
Five configurations are on this frontier alone. They are two levels of GPT-6 Sol, GLM-5.3-Flash, GPT-5.6 Luna, and Gemini 3.5 Flash-Lite. Nothing beats them on all three measurements. But each one is beaten on cost alone, and on speed alone. 18 of the 41 configurations with time data are on the three-way frontier.
All configurations
The order starts with the highest index. Click a heading to sort by that column, and click it again to turn the order around. Point to a row to find the same configuration in the charts. The fidelity column gives the score of the model. Every effort level of one model carries the same score and the same class. The fidelity buttons above each chart also choose the rows here.
| # | Model | Company | Fidelity | Class | Index | Cost per task | Tasks per dollar | Time per task | Tasks per second |
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