Gemini 4 Hydrogen vs. Claude Sonnet 5.5: a comparison of generating animations, games, and websites

In this article, Gemini 4 Hydrogen is considered an experimental model for generating code, 3D scenes, browser games, and interactive websites. The comparison with Claude Sonnet 5.5 is based on the author's practical test rather than an independent standardized benchmark.

Brief conclusion: according to the author, Gemini 4 Hydrogen already assembles working prototypes, but the quality of the result depends heavily on the type of scene.

In environments, simple animations, and basic game logic, the model looked convincing in the test. Complex collisions, transparent materials, creature behavior, and interface clarity required manual review.

How the comparison of Gemini 4 Hydrogen and Claude Sonnet 5.5 was conducted

The author conducted the testing through OpenCode and OpenRouter, selecting the maximum reasoning level for Gemini 4 Hydrogen. Five scenarios were used for the evaluation: an animation of a growing flower, a scene with an orc shaman, an aquarium, a browser game, and a website for a studio. In the author's view, this set makes it possible to assess not only the model's ability to write code, but also its work with visual composition, animations, object states, the interface, and project launch.

The results belong to the author of the experiment. His impressions of Claude Sonnet 5.5, early versions of Gemini Flash, and other models should not be generalized to all projects without additional verification. The outcome is influenced by the prompt, environment, number of iterations, selected reasoning mode, and scene requirements.

Time, cost, and task results

The amounts refer to the author's specific runs and do not represent a universal price for generating with Gemini 4 Hydrogen. The cost changes depending on the number of requests, context length, repeated fixes, and the provider's OpenRouter pricing plan.

Flower animation: strong composition and minor artifacts

In the flower test, Gemini 4 Hydrogen created a scene with a background, soil, and rocks that the author rated as high quality. The main movement—the flower blooming—looks convincing. In the author's impression, the result feels not like a static demonstration but like a finished short animation.

Problems appear in the sequence of actions. The flower first partially closes and then blooms again, while brief flashes and glares are visible in the scene. The rocks move slightly away as the seed opens, although the logic behind this movement remains debatable. The author also suggested that the seed should disappear after sprouting, but in the generated version this transition was probably not implemented completely.

According to the author, this result is already suitable for a presentation prototype. For a game scene, the animation timeline, seed state, cycle restart, lighting, and camera behavior would need to be checked. Here, Gemini 4 Hydrogen demonstrates the difference between an impressive first generation and code that can be included in a product without further refinement.

Orc shaman: convincing effects and less stable details

The scene with the orc shaman became one of the most successful episodes of the Gemini 4 Hydrogen test. According to the author, the character reads as an orc: it has a staff, a crystal, skull-like elements, jewelry, rings, and fangs. The author specifically noted the presence of five fingers, although some details, including one finger and the folded horns, look imperfect.

The magical actions are assembled sequentially: lightning strikes from above and from the staff, a fireball appears in the hand and flies toward the target, and the mannequin reacts by tilting and swaying. This combination is more important than a single beautiful model because, in the author's view, it demonstrates the interaction of several objects and events within the scene.

The author called the totem-creation animation particularly successful. At that moment, the orc bends its knees, whereas during many other actions it remains almost motionless. The author considers the campfire's flames the scene's main weakness, while individual character elements require manual geometric and animation corrections.

Aquarium: convincing fish and weak collisions

The aquarium was Gemini 4 Hydrogen's longest test. The scene included rocks, sand, fish, a castle, plants, a bubbler with bubbles, a snail, and a crab. According to the author, the composition itself turned out fairly well, but the large number of living objects exposed the limitations of the procedural logic in this run.

The fish moved most convincingly: when accelerating, they moved their tails more frequently and then slowed down. However, some fish had problems with transparency and their eyes. From certain angles, the internal parts of the models were visible, along with a second or even an apparent third eye, while some objects got stuck in plants or on the bottom, or tried to pass through the aquarium walls.

The crab moved sideways and wiggled its claws slightly, but one of its parts was attached incorrectly. The snail passed through rocks, and its shell also appeared poorly attached to its body. Collisions were present in the scene, but in the test they did not form a stable behavioral system for all objects.

In the author's subjective assessment, Gemini 4 Hydrogen performed noticeably better than the early results from Gemini Flash, but Claude Sonnet 5.5 performed better in this comparison. The author does not consider this conclusion final: it concerns a single test scenario, not a proven superiority of Claude Sonnet 5.5 in all 3D-generation tasks.

Browser game: a working short prototype

Game generation took about 36 minutes and cost 3 dollars 26 cents. According to the author, several of the final requests took roughly four minutes each. This is important to consider when evaluating not only the price but also the speed of iterative development.

The first launch was unsuccessful, but the game worked after reloading. It includes a robot, movement training, parkour, traps, platforms, batteries, levers, enemies, and additional animations. The robot moves its head when idle and moves its arms when interacting with levers, so the character responds with more than just movement through the level.

During the playthrough, the author noticed no lag or obvious errors. This observation applies to a specific run and does not guarantee game stability across different browsers and devices. Before publication, such a prototype should still be tested after reloading, on a mobile screen, with an unusual sequence of actions, and after clearing local state.

The game turned out short but enjoyable, and the author rated it considerably higher than one of his previous results, which he associates with “Qwen fourth.” In terms of world depth, the project falls short of the stronger result that the author compares with “Fable”; however, the presence of training, enemies, shadows, and animations makes Gemini 4 Hydrogen's generation a useful foundation for further development.

Website: unusual design, working features, and interface questions

Gemini 4 Hydrogen generated the studio website in approximately 12 minutes. It includes 3D models, a studio description, a projects section, prices, and a contact form. According to the author, launching the local server cost 1,04 dollars.

The visual solution turned out unusual thanks to the 3D models and fonts, but some of the interface seemed unclear to the author and at times resembled “AI slop.” In his assessment, a working website does not always have a clear hierarchy, explain its offering, or guide the user toward the target action.

The responsive version passed a basic check: elements did not extend beyond the interface, projects opened, and the built-in calculators worked. According to the author, this is insufficient for a commercial website without checking keyboard navigation, forms, input errors, 3D-object loading speed, text accessibility, and behavior on real mobile devices.

Gemini 4 Hydrogen vs. Claude Sonnet 5.5: what the test shows

In the comparison described, Gemini 4 Hydrogen did not outperform Claude Sonnet 5.5, although the author considers the gap small. Gemini 4 Hydrogen performed well in the test episodes that required a fast visual prototype, a collection of objects, basic animations, and a ready-to-run browser result.

According to the author's subjective assessment, Claude Sonnet 5.5 handled the aquarium better, where stable collisions, correct geometry for character parts, and coordinated behavior among many objects were required. This does not mean that Claude Sonnet 5.5 always creates higher-quality 3D scenes, since a direct comparison requires identical prompts, the same environment, and repeated runs of each model.

The claim that Gemini 4 Hydrogen almost universally outperforms Sonnet-level models 5.5 and GPT-6.1 on benchmarks is presented in this article only as the author's position. The provided data contain no tables, protocols, or independent methodology for such benchmarks. Therefore, this claim cannot be used as a confirmed universal fact.

The cost and practical value of Gemini 4 Hydrogen

The five main scenarios cost the author separate amounts. The cost of the flower, orc, aquarium, and game totaled 9 dollars 59 cents: 2,19 + 1,33 + 2,81 + 3,26. The website is counted separately in this estimate: the author stated 1,04 dollars for launching the local server, but did not describe it as a fully comparable generation expense. If all five stated amounts are added together, the result is 10 dollars 63 cents.

Within this test, lengthy generation was justified where the model created a foundation for subsequent review and refinement. For a one-time visual prototype, the author considers several dollars and tens of minutes acceptable. In daily work, the assessment is influenced by subscription limits, the number of available runs, provider stability, and the cost of repeated fixes—not only by the price of a single successful demonstration.

The author identified Google's subscription limits as Gemini's main limitation. In his assessment, this makes the model difficult to use every day, even when individual generations look successful and cost relatively little. In the original test, the author stated that he chooses Opus 5.5 for daily work and does not plan to purchase a Gemini subscription.

Who Gemini 4 Hydrogen is suitable for

• Developers who, based on the results of this test, need a fast browser prototype of a game or interactive scene.
• Designers checking the composition of an 3D website before fully assembling it manually.
• Teams that need a foundation with objects, animations, and simple interactions.
• SEO specialists and website owners testing unusual promotional pages with calculators and interactive sections.

Based on the results of this test, Gemini 4 Hydrogen is less suitable for scenarios where collisions, physics, accessibility, and stability must work without manual verification. The aquarium showed that a beautiful scene can conceal errors in the relationships between objects, while a working website can remain unclear to the user.

Frequently asked questions about Gemini 4 Hydrogen and Claude Sonnet 5.5

Is Gemini 4 Hydrogen better than Claude Sonnet 5.5?

According to the author's test, Gemini 4 Hydrogen nearly competes with Claude Sonnet 5.5, but does not surpass it. In the aquarium, the author gave Claude Sonnet 5.5 the edge, while rating Gemini 4 Hydrogen positively for generating the game and website.

Can the Gemini 4 Hydrogen game be used without further development?

The game is suitable for a demonstration or an early prototype, according to the author. Before release, it is necessary to check restarting, state saving, controls on mobile devices, collisions, level balance, and errors that did not appear during the short playthrough.

What task proved the most difficult for Gemini 4 Hydrogen?

The aquarium was the most problematic scenario. The fish moved convincingly, but the snail, crab, transparent materials, eyes, and collisions showed that manual refinement was necessary within the scope of this test.

Is it worth buying a Gemini subscription for Gemini 4 Hydrogen?

The author does not plan to buy a subscription because of Google's limited quotas. The decision depends on how frequently it is used, the available plan, and whether the user needs long agent sessions every day.

Conclusion

According to the author, Gemini 4 Hydrogen proved to be a successful participant in the practical comparison. It created a convincing flower animation, an impressive scene with an orc, a short browser game, and a functional website with 3D elements. In this test, the model quickly turned a description into a visual prototype.

Weaknesses emerged where sustained behavioral consistency was required: collisions, transparency, attaching character parts, the logic of repeated states, and interface clarity. When choosing between Gemini 4 Hydrogen and Claude Sonnet 5.5, a developer should consider not only the appealing initial result, but also the amount of manual correction required, the available quotas, and the project's stability after reloading.