Claude Opus 5.5 vs Gemini 2.5 Pro
At a Glance
| Compare | Claude Opus 5.5Anthropic |  Gemini 2.5 ProGoogle DeepMind |
|---|---|---|
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $4.00Anthropic ↗ · Sep 22, 2026 | $1.25Google AI ↗ · Aug 29, 2026 |
| Output priceFrom · USD / 1M tokens | $20.00Anthropic ↗ · Sep 22, 2026 | $10.00Google AI ↗ · Aug 29, 2026 |
| Context windowMaximum documented tokens | 1,000K | 1,049K |
| Model facts checked | Sep 22, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | Claude Opus 5.5 | Gemini 2.5 Pro |
|---|---|---|
| Developer | Anthropic | Google DeepMind |
| Family | Claude 5 5 | Gemini 2 5 |
| Model | Claude Opus 5.5 | Gemini 2.5 Pro |
| Version | Claude Opus 5.5 | Gemini 2.5 Pro |
| Lifecycle | active | active |
| Released | 2026-09-22 | Unknown |
| Knowledge cutoff | 2026-06-01 | 2025-01-01 |
| Input modalities | Text, Image | Text, Image, Video, Audio, Document |
| Output modalities | Text | Text |
| Context window | 1,000K | 1,049K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard) | Google AI (Standard), Google Gemini (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
| Message Batches max output (beta) | 300000 tokens | Unknown |
| Default effort | medium | Unknown |
| Retirement commitment | Not sooner than September 22, 2027 | Unknown |
| Thinking | Adaptive (always on) | Unknown |
Claude Opus 5.5 Capabilities
Gemini 2.5 Pro Capabilities
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Primary Evidence
Sources and Freshness
Questions
Claude Opus 5.5 vs Gemini 2.5 Pro FAQs
Is Claude Opus 5.5 or Gemini 2.5 Pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Opus 5.5 and Gemini 2.5 Pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Opus 5.5 or Gemini 2.5 Pro?+
Claude Opus 5.5 is $4.00 and Gemini 2.5 Pro is $1.25 per million tokens, so Gemini 2.5 Pro is cheaper on this metric. Claude Opus 5.5 is $20.00 and Gemini 2.5 Pro is $10.00 per million tokens, so Gemini 2.5 Pro is cheaper on this metric.
Which has a larger context window, Claude Opus 5.5 or Gemini 2.5 Pro?+
Gemini 2.5 Pro has the larger sourced context window. Claude Opus 5.5 supports 1,000K and Gemini 2.5 Pro supports 1,049K.
Which performs better in benchmarks, Claude Opus 5.5 or Gemini 2.5 Pro?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Opus 5.5 or Gemini 2.5 Pro be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Opus 5.5 is not marked open weight; Gemini 2.5 Pro is not marked open weight.
Can Claude Opus 5.5 and Gemini 2.5 Pro understand images?+
Claude Opus 5.5 is documented with image input; Gemini 2.5 Pro is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Opus 5.5 or Gemini 2.5 Pro?+
Claude Opus 5.5 has the larger sourced maximum output: Claude Opus 5.5 supports 128K and Gemini 2.5 Pro supports 66K output tokens.
Do Claude Opus 5.5 and Gemini 2.5 Pro support reasoning and tool use?+
Claude Opus 5.5: reasoning, tool calling, and image input. Gemini 2.5 Pro: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Opus 5.5 or Gemini 2.5 Pro?+
Claude Opus 5.5 has 1 sourced provider route; Gemini 2.5 Pro has 2, so Gemini 2.5 Pro has broader tracked availability.
Which offers better value, Claude Opus 5.5 or Gemini 2.5 Pro?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.