Claude Sonnet 5.5 vs Gemini 4 Argon: Specs & Benchmark Comparison
Claude Sonnet 5.5 is developed by Anthropic, while Gemini 4 Argon comes from Google. Both were released in September 2026.
The two models share 6 published benchmarks. They split them evenly, 3 to 3. The widest gaps are on Terminal-Bench 4.0, where Claude Sonnet 5.5 scores 70.6% against 57.4%; Chartography (no tools), where Gemini 4 Argon scores 71.6% against 61.6%. Averaged across everything we track, Claude Sonnet 5.5 sits at 67.4% and Gemini 4 Argon at 67.3%.
Claude Sonnet 5.5 is available through an API at $2 per million input tokens with a 1M-token context window. We do not track a hosted API for Gemini 4 Argon, so pricing and context cannot be compared directly.
| Characteristic | Claude Sonnet 5.5 | Gemini 4 Argon |
|---|---|---|
| Company | Anthropic | |
| Release Date | September 28, 2026 | September 30, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | — |
| Context (output) | 128K | — |
| Input Price / 1M | $2.00 | — |
| Output Price / 1M | $10.00 | — |
| Average Score | 67.4% | 67.3% |
| Benchmarks | ||
| Terminal-Bench 4.0 | 70.6% | 57.4% |
| Chartography (no tools) | 61.6% | 71.6% |
| DeepSWE 1.1 | 71.0% | 77.9% |
| FrontierSWE V2 | 61.9% | 55.0% |
| AutomationBench | 44.7% | 51.3% |
| Terminal-Bench-Science 0.1 | 59.9% | 57.6% |
Visual Benchmark Comparison
Verdict
Both models show equal results — the choice depends on your specific use case.
Both models show comparable average scores: Claude Sonnet 5.5 — 0.7, Gemini 4 Argon — 0.7.
Both models were released around the same time: 9/28/2026 and 9/30/2026.
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Frequently Asked Questions
Which is better for coding — Claude Sonnet 5.5 or Gemini 4 Argon?
Which model is cheaper — Claude Sonnet 5.5 or Gemini 4 Argon?
Which has a larger context window — Claude Sonnet 5.5 or Gemini 4 Argon?
The Claude Sonnet 5.5 and Gemini 4 Argon comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Sonnet 5.5 or Gemini 4 Argon page. See also the complete list of AI model comparisons.