Alternatives · 15 models compared · checked 10 Oct 2026
Claude Sonnet 5.5 alternatives: 15 models in or near grid E5
The closest model to Claude Sonnet 5.5 on the atlas is Gemini 2.5 Pro Preview 06-05, in the same square, at $1.25 per 1M input tokens against Claude Sonnet 5.5’s . 10 of the 15 nearest models are cheaper on input; the cheapest is DeepSeek V4.1 Flash at $0.30. We rank by position on the atlas, not by capability, because we hold no capability data.
$2.00
observed We measured
- Source
- Our catalogue
- Retrieved
- 10 Oct 2026
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Cite this page
ModelsAtlas. “Claude Sonnet 5.5 alternatives: 15 models in or near grid E5”. Retrieved 10 Oct 2026. https://modelsatlas.com/models/anthropic/claude-sonnet-5-5/alternatives
Where the alternatives sit
Each square is a price band (A–H) × a context band (1–6). How the grid works
Same squareGRIDE511 modelsClaude Sonnet 5, Gemini 2.5 Pro Preview 06-05, Gemini 3.1 Pro Preview and 8 more
Claude Sonnet 5.5Its 15 nearest modelsOther modelsOpen weights
View the map as a table (2 squares)
| Square | Price band | Context band | Models |
|---|---|---|---|
| GRIDD5 | $0.30–1 | 1M | DeepSeek V4.1 Flash, Gemini 2.5 Flash, Gemini 3.5 Flash Lite, MiniMax M3 |
| GRIDE5 | $1–3 | 1M | Claude Sonnet 5.5, Gemini 2.5 Pro Preview 06-05, Grok 4.3, Muse Spark 1.1, Muse Spark 1.2, Muse Spark 1.3, Gemini 3.5 Flash, Claude Sonnet 5, Gemini 3.1 Pro Preview, Gemini 3.1 Pro Preview Custom Tools, GPT-4.1, Qwen3.8 2.4T A95B |
Top 15 alternatives
Ranked by steps away on the atlas, then cheaper before pricier, then input price
| # | Model | Grid | Why it fits | Input / 1M | vs Claude Sonnet 5.5 | Output / 1M | Context | |
|---|---|---|---|---|---|---|---|---|
| — | Claude Sonnet 5.5Anthropic · the model you’re replacing | GRIDE5 | Baseline | $2.00 | — | $10.00 | 1M | |
| 1 | Gemini 2.5 Pro Preview 06-05Google | GRIDE5 | Same square, 38% cheaper input | $1.25 | −37% | $10.00 | 1.05M | |
| 2 | Grok 4.3xAI | GRIDE5 | Same square, 38% cheaper input | $1.25 | −37% | $2.50 | 1M | |
| 3 | Muse Spark 1.1Meta | GRIDE5 | Same square, 38% cheaper input | $1.25 | −37% | $4.25 | 1.05M | |
| 4 | Muse Spark 1.2Meta | GRIDE5 | Same square, 38% cheaper input | $1.25 | −37% | $4.25 | 1.05M | |
| 5 | Muse Spark 1.3Meta | GRIDE5 | Same square, 38% cheaper input | $1.25 | −37% | $4.25 | 1.05M | |
| 6 | Gemini 3.5 FlashGoogle | GRIDE5 | Same square, 25% cheaper input | $1.50 | −25% | $9.00 | 1.05M | Compare → |
| 7 | Claude Sonnet 5Anthropic | GRIDE5 | Same maker, same square, same input price | $2.00 | same | $10.00 | 1M | Compare → |
| 8 | Gemini 3.1 Pro PreviewGoogle | GRIDE5 | Same square, same input price | $2.00 | same | $12.00 | 1.05M | Compare → |
| 9 | Gemini 3.1 Pro Preview Custom ToolsGoogle | GRIDE5 | Same square, same input price | $2.00 | same | $12.00 | 1.05M | Compare → |
| 10 | GPT-4.1OpenAI | GRIDE5 | Same square, same input price | $2.00 | same | $8.00 | 1.05M | Compare → |
| 11 | Qwen3.8 2.4T A95BQwen (Alibaba) | GRIDE5 | Same square, same input price | $2.00 | same | $6.00 | 1.05M | Compare → |
| 12 | DeepSeek V4.1 FlashDeepSeek | GRIDD5 | Neighbouring square D5, 85% cheaper input | $0.30 | −85% | $1.20 | 1.05M | |
| 13 | Gemini 2.5 FlashGoogle | GRIDD5 | Neighbouring square D5, 85% cheaper input | $0.30 | −85% | $2.50 | 1.05M | |
| 14 | Gemini 3.5 Flash LiteGoogle | GRIDD5 | Neighbouring square D5, 85% cheaper input | $0.30 | −85% | $2.50 | 1.05M | |
| 15 | MiniMax M3MiniMax | GRIDD5 | Neighbouring square D5, 85% cheaper input | $0.30 | −85% | $1.20 | 1.05M |
What switching saves
3,000 input + 800 output tokens × 1,000 requests a day
Σ Derived from standard-tier prices; excludes caching and batch discounts. Use your own numbers →
Larger-context alternatives
| Model | Input / 1M | Context | |
|---|---|---|---|
| Gemini 2.5 Pro Preview 06-05Google | $1.25 | 1.05M | |
| Muse Spark 1.1Meta | $1.25 | 1.05M | |
| Muse Spark 1.2Meta | $1.25 | 1.05M | |
| Muse Spark 1.3Meta | $1.25 | 1.05M | |
| Gemini 3.5 FlashGoogle | $1.50 | 1.05M | Compare |
Free alternatives
| Model | Input / 1M | Context | |
|---|---|---|---|
| Lyria 3 Clip PreviewGoogle | Free | 1.05M | |
| Lyria 3 Pro PreviewGoogle | Free | 1.05M |
Compare Claude Sonnet 5.5 head to head
Questions
What is the best alternative to Claude Sonnet 5.5?
Gemini 2.5 Pro Preview 06-05 ranks first: same square, 38% cheaper input. Input is $1.25 per 1M tokens against $2.00 for Claude Sonnet 5.5. Ranking is by position on the atlas, not by quality.
What is the cheapest alternative to Claude Sonnet 5.5?
DeepSeek V4.1 Flash at $0.30 per 1M input tokens, 85% less than Claude Sonnet 5.5, among the 15 closest.
Is there an open-weight alternative to Claude Sonnet 5.5?
None of the 15 closest is marked open-weight in our records.
Which alternative has a larger context window?
Gemini 2.5 Pro Preview 06-05, Muse Spark 1.1, Muse Spark 1.2, Muse Spark 1.3 and 9 more hold more than Claude Sonnet 5.5's 1M; the largest is Gemini 2.5 Pro Preview 06-05 at 1.05M.
How are alternatives ranked?
By distance on the atlas grid from Claude Sonnet 5.5's square E5: the same square first, then neighbouring squares. Within the same distance, cheaper models come before pricier ones, then the lowest input price wins. We hold no capability data, so we do not claim a model can do what Claude Sonnet 5.5 does, only that it costs and holds about the same. No vendor pays for position.
More alternatives
Keep going in your AI
Opens with this page as the source. We add nothing else to the prompt.
- What is the best alternative to Claude Sonnet 5.5?
- What is the cheapest alternative to Claude Sonnet 5.5?
- Is there an open-weight alternative to Claude Sonnet 5.5?