Model Comparison
Claude Haiku 5.5 vs Grok 4.7
Too close to call: the best configurations, Claude Haiku 5.5 (max effort) and Grok 4.7 (medium), are 85 Elo apart, and their 95% ranges overlap. Among 78 models, each ranked by its best configuration, Claude Haiku 5.5 is #16 and Grok 4.7 is #22. Cost per script: $0.103 for Claude Haiku 5.5 (max effort) and $0.215 for Grok 4.7 (medium).
Last updated , from board data generated at 01:13 UTC.
Picks and Verdict
PickClaude Haiku 5.5
Claude Haiku 5.5 (xhigh)
Pick Claude Haiku 5.5 (xhigh) for cheap drafts, since $0.029 a script gets an Elo the board can't separate from Grok 4.7 (medium) at $0.215.
PickGrok 4.7
Grok 4.7 (medium)
Pick Grok 4.7 (medium) when video structure matters more than polish, since its 80.5 on YouTube Best Practices is above every Claude Haiku 5.5 setting.
By level name, Grok 4.7 looks like the winner here. At low, medium and high, the three names both models use, Grok has the higher Elo each time, with 95% ranges that don't overlap. Then Claude Haiku 5.5 keeps going for two more settings, and those are the ones that count. Claude Haiku 5.5 (max effort) rates 85 Elo above Grok 4.7 (medium), Grok's best, which makes Haiku the #16 model of 78 and Grok the #22 model. Those two ranges overlap by a hair, so the board can't separate them. One step down, Claude Haiku 5.5 (xhigh) costs $0.029 a script against $0.215 for Grok at medium, about a seventh of the price, and its range overlaps Grok's best too. The names don't mean the same budget: Grok at high takes about ten minutes, Haiku at high a minute and a half. Grok's fair point is video structure, more than three points ahead on YouTube Best Practices. Its Writing Craft & Clarity sits about six points under Haiku's, and its length is well behind. I'd skip max effort's twelve-minute wait, so xhigh is the Haiku setting I'd run.
Disclosure: Claude Haiku 5.5 comes from the same lab as one of the four judges, Claude Opus 5.5. The other three sit outside its lab, so it is never scored by its own lab alone (how the panel works). The judge analysis measures how much each judge favors its own lab.
How to Read the Writing Score, Writing Elo and 95% Ranges
Writing Score and Writing Elo. The Writing Score (0 to 100) is the weighted average of the nine metric scores: seven from the judges, Length Adherence from code and the Slop Score half from each. The Writing Elo is a rating from pairwise comparisons: on each script, each configuration's average across its drafts is compared with every other configuration's, and gaps within the draft-to-draft variation count as draws. Elo rewards winning often, so the two can put configurations in a different order.
Elo ranges. Each 95% range shows how far a configuration's Elo could move if the drafts had come out slightly differently. It comes from resampling every configuration's recorded draft scores on each reference script and ranking again. Comparing two separate ranges does not test the Elo gap between them: ranges far apart are strong evidence for the order, and overlapping ranges do not mean a tie. The reference scripts stay fixed, so the ranges say nothing about new scripts. The methodology page has the full description.
All Thinking Levels of Both Models
Every ranked configuration of Claude Haiku 5.5 and Grok 4.7, scored on the same 10 scripts by the same four judges.
- Each row is one configuration: the model at one thinking level. The dot is its Writing Elo, a rating from pairwise comparisons of the scores on each script, and the bar is its 95% range: how far that Elo could move if the drafts had come out slightly differently.
- When two bars overlap, the board cannot order those two configurations. Bars far apart are strong evidence for the order.
- The table under the chart lists the same configurations in the same order and adds the Writing Score (the 0 to 100 consensus of the judges and code), cost, time and configuration rank (the place among all configurations on the board).
Shaded rows are the configurations chosen for the metric comparison below.
| Configuration | Writing Elo | 95% Range | Writing Score | Cost / Script | Time / Script | Reasoning Tokens | Configuration Rank |
|---|---|---|---|---|---|---|---|
| Claude Haiku 5.5 (max effort) | 2009 | 1972 to 2044 | 80.8 | $0.103 | 12.6 min | N/A | #31 |
| Claude Haiku 5.5 (xhigh) | 1927 | 1883 to 1965 | 80.0 | $0.029 | 3.6 min | N/A | #41 |
| Grok 4.7 (medium) | 1924 | 1863 to 1974 | 79.6 | $0.215 | 6.2 min | 27,687 | #42 |
| Grok 4.7 (high) | 1897 | 1850 to 1939 | 79.6 | $0.305 | 9.6 min | 42,549 | #43 |
| Grok 4.7 (low) | 1834 | 1784 to 1890 | 79.0 | $0.064 | 1.7 min | 2,760 | #48 |
| Claude Haiku 5.5 (high) | 1723 | 1679 to 1760 | 78.0 | $0.012 | 1.5 min | N/A | #53 |
| Claude Haiku 5.5 (medium) | 1620 | 1572 to 1670 | 76.7 | $0.0067 | 0.8 min | N/A | #62 |
| Claude Haiku 5.5 (low) | 1504 | 1461 to 1550 | 75.2 | $0.0045 | 0.5 min | N/A | #74 |
Cost is one script at the API list price of the route used, uncached and without judging. Time is the average for one accepted script, retries included. N/A under Reasoning Tokens means the board has no separate reasoning count for that route.
Computed Findings Across Thinking Levels
Each finding is computed from the configurations above. Where two 95% ranges overlap, the board cannot order those two configurations.
- Best Configurations Head to Head. Claude Haiku 5.5 (max effort) at Elo 2009 (range 1972 to 2044) and Grok 4.7 (medium) at Elo 1924 (range 1863 to 1974) have overlapping 95% ranges, so the board cannot separate the two best configurations.
- Lowest Thinking Levels Head to Head. At their lowest thinking levels, Grok 4.7 (low) at Elo 1834 and $0.064 per script leads Claude Haiku 5.5 (low) at Elo 1504 and $0.0045 per script by 330 Elo. Their 95% ranges do not overlap.
- Same Level Name, Side by Side. Grok 4.7 has the higher Writing Elo at every level name both models use: low, medium, and high. The 95% ranges do not overlap at any of them. Level names come from each provider, so the same name does not promise the same reasoning budget.
- Cheapest Claude Haiku 5.5 Configuration Above Grok 4.7's Best. The cheapest Claude Haiku 5.5 configuration with a higher Writing Elo than Grok 4.7 (medium), at Elo 1924 and $0.215 per script, is Claude Haiku 5.5 (xhigh), at Elo 1927 and $0.029 per script. Their 95% ranges overlap, so the board cannot separate them. It costs less than the configuration it beats.
- Lowest to Highest Thinking Level. Claude Haiku 5.5 moves +505 Elo from low to max effort, at about 23 times the cost per script. Grok 4.7 moves +63 Elo from low to high, at about 4.8 times the cost per script.
Writing Elo at Each Shared Level Name
| Level | Claude Haiku 5.5 | Grok 4.7 | Gap | 95% Ranges |
|---|---|---|---|---|
| low | 1504 | 1834 | -330 | Separate |
| medium | 1620 | 1924 | -304 | Separate |
| high | 1723 | 1897 | -174 | Separate |
Gap is Claude Haiku 5.5 minus Grok 4.7 at the same level name, using each model's highest-rated configuration at that level.
Two Chosen Configurations Compared
Pick one configuration of each model to compare their metric scores, consistency across drafts and per-script scores. Each menu starts on the model's best configuration.
Scores by Metric
Claude Haiku 5.5 (max effort) scores higher on four of the nine metrics and Grok 4.7 (medium) on five. Weighted by each metric's share of the Writing Score, Length Adherence does the most to put Claude Haiku 5.5 (max effort) ahead, with a 18.6-point lead on that metric. The weight beside each metric is its share of the Writing Score.
Consistency Across Drafts
| Claude Haiku 5.5 (max effort) | Grok 4.7 (medium) | |
|---|---|---|
| Score spread across drafts (±) | 1.55 | 3.00 |
| Lowest script score | 78.2 Script 10 | 75.6 Script 10 |
| Highest script score | 82.6 Script 4 | 82.2 Script 2 |
| Range across scripts | 4.4 | 6.6 |
Spread is how much the Writing Score moves between a configuration's drafts, and lower is steadier. Green marks the better number in each row.
Scores by Script
Writing Score on each reference script. Gap is Claude Haiku 5.5 (max effort) minus Grok 4.7 (medium), and the higher score is in bold.
| Script | Claude Haiku 5.5 (max effort) | Grok 4.7 (medium) | Gap |
|---|---|---|---|
| Script 1 opinion / warning explainer | 80.3 | 81.5 | -1.2 |
| Script 2 news-analysis / skeptical explainer | 80.7 | 82.2 | -1.5 |
| Script 3 personal roadmap / opinion | 80.8 | 81.6 | -0.8 |
| Script 4 short explainer | 82.6 | 76.9 | +5.7 |
| Script 5 news-analysis / opinion explainer | 81.7 | 80.5 | +1.2 |
| Script 6 founder announcement / personal origin story | 81.1 | 82.0 | -0.9 |
| Script 7 personal technical walkthrough / agentic workflow case study | 80.0 | 76.5 | +3.5 |
| Script 8 product release announcement / personal observation | 81.3 | 79.0 | +2.3 |
| Script 9 career guide / hiring analysis | 81.5 | 80.2 | +1.3 |
| Script 10 engineering process walkthrough / presentation adaptation | 78.2 | 75.6 | +2.6 |
Scorecards and Thinking Pages
Each configuration name in the table above opens its own scorecard.
Compare With Another Model
Pick a second model. A pair with its own written match-up opens that page, and any other pair opens in the comparison tool.
Nearby Match-Ups by Best Writing Elo
Every configuration wrote five drafts for each of the same 10 briefs, from the same prompt. Generation was closed-book, with the prompt as the only source and no web search or other tools. Each judge scores every draft once: Claude Opus 5.5 at medium effort through the Claude Code subscription, GPT-6.1 Sol at medium reasoning through the Codex CLI, GLM 5.3 Flash through OpenRouter, and Jev 1.13, a typed judge from TypeSafe that answers each metric as a multiple-choice question. The channel's finished script is their reference for the voice, and it gets no score on the board itself.
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