diff --git a/assets/benchmarks.svg b/assets/benchmarks.svg
index 2dfedbda3..ee7e0b175 100644
--- a/assets/benchmarks.svg
+++ b/assets/benchmarks.svg
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+    <g transform="translate(688.636152 115.761025) scale(0.22 -0.22)">
      <use xlink:href="#Helvetica-61"/>
      <use xlink:href="#Helvetica-66" x="55.615234"/>
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      <use xlink:href="#Helvetica-6e" x="411.328125"/>
      <use xlink:href="#Helvetica-67" x="466.943359"/>
     </g>
-    <!-- unittest errors -->
-    <g transform="translate(678.871933 139.4359) scale(0.22 -0.22)">
+    <!-- unit test errors -->
+    <g transform="translate(675.815996 139.5664) scale(0.22 -0.22)">
      <use xlink:href="#Helvetica-75"/>
      <use xlink:href="#Helvetica-6e" x="55.615234"/>
      <use xlink:href="#Helvetica-69" x="111.230469"/>
      <use xlink:href="#Helvetica-74" x="133.447266"/>
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-     <use xlink:href="#Helvetica-73" x="244.628906"/>
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-     <use xlink:href="#Helvetica-72" x="528.027344"/>
-     <use xlink:href="#Helvetica-73" x="561.328125"/>
+     <use xlink:href="#Helvetica-20" x="161.230469"/>
+     <use xlink:href="#Helvetica-74" x="189.013672"/>
+     <use xlink:href="#Helvetica-65" x="216.796875"/>
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+     <use xlink:href="#Helvetica-20" x="350.195312"/>
+     <use xlink:href="#Helvetica-65" x="377.978516"/>
+     <use xlink:href="#Helvetica-72" x="433.59375"/>
+     <use xlink:href="#Helvetica-72" x="466.894531"/>
+     <use xlink:href="#Helvetica-6f" x="500.195312"/>
+     <use xlink:href="#Helvetica-72" x="555.810547"/>
+     <use xlink:href="#Helvetica-73" x="589.111328"/>
     </g>
    </g>
    <g id="text_31">
-    <!-- Code Editing Success -->
-    <g transform="translate(348.830875 43.036875) scale(0.264 -0.264)">
+    <!-- GPT Code Editing -->
+    <g transform="translate(371.582313 43.2) scale(0.264 -0.264)">
      <defs>
+      <path id="Helvetica-47" d="M 2472 4709 
+Q 3119 4709 3591 4459 
+Q 4275 4100 4428 3200 
+L 3813 3200 
+Q 3700 3703 3347 3933 
+Q 2994 4163 2456 4163 
+Q 1819 4163 1383 3684 
+Q 947 3206 947 2259 
+Q 947 1441 1306 927 
+Q 1666 413 2478 413 
+Q 3100 413 3508 773 
+Q 3916 1134 3925 1941 
+L 2488 1941 
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+L 4103 0 
+L 3953 591 
+Q 3638 244 3394 109 
+Q 2984 -122 2353 -122 
+Q 1538 -122 950 406 
+Q 309 1069 309 2225 
+Q 309 3378 934 4059 
+Q 1528 4709 2472 4709 
+z
+M 2369 4716 
+L 2369 4716 
+z
+" transform="scale(0.015625)"/>
+      <path id="Helvetica-54" d="M 3828 4591 
+L 3828 4044 
+L 2281 4044 
+L 2281 0 
+L 1650 0 
+L 1650 4044 
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+" transform="scale(0.015625)"/>
       <path id="Helvetica-43" d="M 2422 4716 
 Q 3294 4716 3775 4256 
 Q 4256 3797 4309 3213 
@@ -1858,45 +1900,41 @@ L 2244 4591
 z
 " transform="scale(0.015625)"/>
      </defs>
-     <use xlink:href="#Helvetica-43"/>
-     <use xlink:href="#Helvetica-6f" x="72.216797"/>
-     <use xlink:href="#Helvetica-64" x="127.832031"/>
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-     <use xlink:href="#Helvetica-6e" x="461.376953"/>
-     <use xlink:href="#Helvetica-67" x="516.992188"/>
-     <use xlink:href="#Helvetica-20" x="572.607422"/>
-     <use xlink:href="#Helvetica-53" x="600.390625"/>
-     <use xlink:href="#Helvetica-75" x="667.089844"/>
-     <use xlink:href="#Helvetica-63" x="722.705078"/>
-     <use xlink:href="#Helvetica-63" x="772.705078"/>
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-     <use xlink:href="#Helvetica-73" x="878.320312"/>
-     <use xlink:href="#Helvetica-73" x="928.320312"/>
+     <use xlink:href="#Helvetica-47"/>
+     <use xlink:href="#Helvetica-50" x="77.783203"/>
+     <use xlink:href="#Helvetica-54" x="144.482422"/>
+     <use xlink:href="#Helvetica-20" x="205.566406"/>
+     <use xlink:href="#Helvetica-43" x="233.349609"/>
+     <use xlink:href="#Helvetica-6f" x="305.566406"/>
+     <use xlink:href="#Helvetica-64" x="361.181641"/>
+     <use xlink:href="#Helvetica-65" x="416.796875"/>
+     <use xlink:href="#Helvetica-20" x="472.412109"/>
+     <use xlink:href="#Helvetica-45" x="500.195312"/>
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+     <use xlink:href="#Helvetica-69" x="622.509766"/>
+     <use xlink:href="#Helvetica-74" x="644.726562"/>
+     <use xlink:href="#Helvetica-69" x="672.509766"/>
+     <use xlink:href="#Helvetica-6e" x="694.726562"/>
+     <use xlink:href="#Helvetica-67" x="750.341797"/>
     </g>
    </g>
    <g id="legend_1">
     <g id="patch_49">
-     <path d="M 131.088 223.472813 
-L 307.87175 223.472813 
-Q 312.27175 223.472813 312.27175 219.072813 
-L 312.27175 64.436875 
-Q 312.27175 60.036875 307.87175 60.036875 
-L 131.088 60.036875 
-Q 126.688 60.036875 126.688 64.436875 
-L 126.688 219.072813 
-Q 126.688 223.472813 131.088 223.472813 
+     <path d="M 131.088 223.635937 
+L 307.87175 223.635937 
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 " style="fill: #ffffff; opacity: 0.8; stroke: #cccccc; stroke-linejoin: miter"/>
     </g>
     <g id="text_32">
      <!-- Edit Format -->
-     <g transform="translate(162.635656 84.618438) scale(0.22 -0.22)">
+     <g transform="translate(162.635656 84.781562) scale(0.22 -0.22)">
       <use xlink:href="#Helvetica-45"/>
       <use xlink:href="#Helvetica-64" x="66.699219"/>
       <use xlink:href="#Helvetica-69" x="122.314453"/>
@@ -1911,16 +1949,16 @@ z
      </g>
     </g>
     <g id="patch_50">
-     <path d="M 135.488 115.985625 
-L 179.488 115.985625 
-L 179.488 100.585625 
-L 135.488 100.585625 
+     <path d="M 135.488 116.14875 
+L 179.488 116.14875 
+L 179.488 100.74875 
+L 135.488 100.74875 
 z
-" style="fill: #b3e6a8; stroke: #eeeeee; stroke-width: 2; stroke-linejoin: miter"/>
+" style="fill: #b3e6a8; stroke: #ffffff; stroke-width: 3; stroke-linejoin: miter"/>
     </g>
     <g id="text_33">
      <!-- diff -->
-     <g transform="translate(197.088 115.985625) scale(0.22 -0.22)">
+     <g transform="translate(197.088 116.14875) scale(0.22 -0.22)">
       <use xlink:href="#Helvetica-64"/>
       <use xlink:href="#Helvetica-69" x="55.615234"/>
       <use xlink:href="#Helvetica-66" x="77.832031"/>
@@ -1928,16 +1966,16 @@ z
      </g>
     </g>
     <g id="patch_51">
-     <path d="M 135.488 147.352813 
-L 179.488 147.352813 
-L 179.488 131.952813 
-L 135.488 131.952813 
+     <path d="M 135.488 147.515937 
+L 179.488 147.515937 
+L 179.488 132.115937 
+L 135.488 132.115937 
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-" style="fill: url(#h83cb846590); stroke: #eeeeee; stroke-width: 2; stroke-linejoin: miter"/>
+" style="fill: url(#h933a162d1d); stroke: #ffffff; stroke-width: 3; stroke-linejoin: miter"/>
     </g>
     <g id="text_34">
      <!-- diff-func -->
-     <g transform="translate(197.088 147.352813) scale(0.22 -0.22)">
+     <g transform="translate(197.088 147.515937) scale(0.22 -0.22)">
       <use xlink:href="#Helvetica-64"/>
       <use xlink:href="#Helvetica-69" x="55.615234"/>
       <use xlink:href="#Helvetica-66" x="77.832031"/>
@@ -1950,16 +1988,16 @@ z
      </g>
     </g>
     <g id="patch_52">
-     <path d="M 135.488 178.72 
-L 179.488 178.72 
-L 179.488 163.32 
-L 135.488 163.32 
+     <path d="M 135.488 178.883125 
+L 179.488 178.883125 
+L 179.488 163.483125 
+L 135.488 163.483125 
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-" style="fill: #b3d1e6; stroke: #eeeeee; stroke-width: 2; stroke-linejoin: miter"/>
+" style="fill: #b3d1e6; stroke: #ffffff; stroke-width: 3; stroke-linejoin: miter"/>
     </g>
     <g id="text_35">
      <!-- whole -->
-     <g transform="translate(197.088 178.72) scale(0.22 -0.22)">
+     <g transform="translate(197.088 178.883125) scale(0.22 -0.22)">
       <use xlink:href="#Helvetica-77"/>
       <use xlink:href="#Helvetica-68" x="72.216797"/>
       <use xlink:href="#Helvetica-6f" x="127.832031"/>
@@ -1968,16 +2006,16 @@ z
      </g>
     </g>
     <g id="patch_53">
-     <path d="M 135.488 210.087188 
-L 179.488 210.087188 
-L 179.488 194.687188 
-L 135.488 194.687188 
+     <path d="M 135.488 210.250312 
+L 179.488 210.250312 
+L 179.488 194.850312 
+L 135.488 194.850312 
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-" style="fill: url(#hd5951d1aae); stroke: #eeeeee; stroke-width: 2; stroke-linejoin: miter"/>
+" style="fill: url(#hee5da66861); stroke: #ffffff; stroke-width: 3; stroke-linejoin: miter"/>
     </g>
     <g id="text_36">
      <!-- whole-func -->
-     <g transform="translate(197.088 210.087188) scale(0.22 -0.22)">
+     <g transform="translate(197.088 210.250312) scale(0.22 -0.22)">
       <use xlink:href="#Helvetica-77"/>
       <use xlink:href="#Helvetica-68" x="72.216797"/>
       <use xlink:href="#Helvetica-6f" x="127.832031"/>
@@ -1994,12 +2032,12 @@ z
   </g>
  </g>
  <defs>
-  <clipPath id="p23c69ca731">
-   <rect x="115.688" y="49.036875" width="724.552" height="451.995125"/>
+  <clipPath id="pf511fcd1c4">
+   <rect x="115.688" y="49.2" width="724.552" height="451.832"/>
   </clipPath>
  </defs>
  <defs>
-  <pattern id="h83cb846590" patternUnits="userSpaceOnUse" x="0" y="0" width="72" height="72">
+  <pattern id="h933a162d1d" patternUnits="userSpaceOnUse" x="0" y="0" width="72" height="72">
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@@ -2507,9 +2545,9 @@ L 73.902113 0.618034
 L 75.804226 -1.236068 
 L 73.175571 -1.618034 
 L 72 -4 
-" style="fill: #eeeeee; stroke: #eeeeee; stroke-width: 0.5; stroke-linecap: butt; stroke-linejoin: miter"/>
+" style="fill: #ffffff; stroke: #ffffff; stroke-width: 0.5; stroke-linecap: butt; stroke-linejoin: miter"/>
   </pattern>
-  <pattern id="hd5951d1aae" patternUnits="userSpaceOnUse" x="0" y="0" width="72" height="72">
+  <pattern id="hee5da66861" patternUnits="userSpaceOnUse" x="0" y="0" width="72" height="72">
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 L 73.175571 -1.618034 
 L 72 -4 
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 </svg>
diff --git a/benchmark/benchmark.py b/benchmark/benchmark.py
index 9d885d86c..f840c3230 100755
--- a/benchmark/benchmark.py
+++ b/benchmark/benchmark.py
@@ -106,8 +106,8 @@ def show_stats(dirnames):
         for i, fmt in enumerate(formats):
             if zorder > 1:
                 edge = dict(
-                    edgecolor="#eeeeee",
-                    linewidth=2,
+                    edgecolor="#ffffff",
+                    linewidth=3,
                 )
             else:
                 edge = dict()
@@ -148,16 +148,16 @@ def show_stats(dirnames):
         arrowprops={"arrowstyle": "->", "connectionstyle": "arc3,rad=0.3"},
     )
     ax.annotate(
-        "Second attempt,\nafter seeing\nunittest errors",
+        "Second attempt,\nafter seeing\nunit test errors",
         xy=(3.1, 68),
         xytext=(4.25, 80),
         horizontalalignment="center",
         arrowprops={"arrowstyle": "->", "connectionstyle": "arc3,rad=0.3"},
     )
 
-    ax.set_ylabel("Percent of exercises with\nall unittests passing")
+    ax.set_ylabel("Percent of exercises with\nall unit tests passing")
     # ax.set_xlabel("Model")
-    ax.set_title("Code Editing Success")
+    ax.set_title("GPT Code Editing")
     ax.legend(
         title="Edit Format",
         loc="upper left",
diff --git a/docs/benchmarks.md b/docs/benchmarks.md
index b90e7bf6d..ed2e25ed6 100644
--- a/docs/benchmarks.md
+++ b/docs/benchmarks.md
@@ -10,18 +10,18 @@ improvements to your code.
 
 The ability for GPT to reliably edit local source files is
 crucial for this functionality.
-Improving the reliability of code
-editing often involves modifying and experimenting with the "edit
-format" used by aider. The edit format is a critical component of the
-system prompt, dictating how GPT should structure code edits in its
+Much of this depends on the "edit format", which is an important component of the
+system prompt.
+The edit format specifies how GPT should structure code edits in its
 responses.
 
 Aider currently uses simple text based editing formats, but
 [OpenAI's new function calling
 API](https://openai.com/blog/function-calling-and-other-api-updates)
-looked like a promising way to construct a more structured editing format.
+look like a promising way to create more structured edit formats.
 Before making such a big change, I wanted to make
-sure I had a quantitative way to assess the impact on
+sure I had a quantitative way to assess
+how function based edit formats would affect
 the reliability of code editing.
 
 I developed a
@@ -40,8 +40,8 @@ on almost all the ChatGPT models, using a variety of edit formats.
 The results were quite interesting:
 
   - Asking GPT to return an updated copy of the whole file in a standard markdown fenced code block proved to be the most reliable and effective edit format across all GPT-3.5 and GPT-4 models. The results from this `whole` edit format are shown in solid blue in the graph.
-  - Using the new function calling API performed worse than the above whole file method for all models. GPT-3.5 especially produced inferior code and frequently mangled this output format. This was surprising, as the functions API was introduced to enhance the reliability of structured outputs. The results from these `...-func` edit methods are shown as patterned bars in the graph (both green and blue).
-  - The performance of the June (`0613`) version of GPT-3.5 appears to be a bit worse than the Feb (`0301`) version. This is visible if you look at the "first coding attempt" markers on the blue bars.
+  - Using the new functions API performed worse than the above whole file method for all models. GPT-3.5 especially produced inferior code and frequently mangled this output format. This was surprising, as the functions API was introduced to enhance the reliability of structured outputs. The results from these `...-func` edit methods are shown as patterned bars in the graph (both green and blue).
+  - The performance of the new June (`0613`) version of GPT-3.5 appears to be a bit worse than the February (`0301`) version. This is visible if you look at the "first coding attempt" markers on the first three blue bars.
   - As expected, the GPT-4 models outperformed the GPT-3.5 models in code editing.
 
 The quantitative benchmark results align with my intuitions
@@ -115,6 +115,14 @@ Many of the exercises have multiple paragraphs of instructions,
 and most human coders would likely fail some tests on their
 first try.
 
+The bars in the graph show the percent of exercises that were completed by
+each model and edit format combination. The full bar height represents
+the final outcome following the first coding attempt and the second
+attempt that includes the unit test error output.
+Each bar also has a horizontal mark that shows
+the intermediate performance after the first coding attempt,
+without the benefit of second try.
+
 It's worth noting that GPT never gets to see the source code of the
 unit tests during the benchmarking. It only sees the error output from
 failed tests. Of course, all of this code was probably part of its