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Claude Opus 4.7 vs Gemini 3.1 Pro

Claude Opus 4.7 grades higher overall (87.3 against 77.4). Gemini 3.1 Pro costs 55% less for the same work, and both read a 1M-token context.

Claude Opus 4.7

by Anthropic · #6 of 67 overall

Coming soon · price at launch
Context
1M
Input / 1M
$5.00
Output / 1M
$25.00

Gemini 3.1 Pro

by Google · #20 of 67 overall

Coming soon · price at launch
Context
1M
Input / 1M
$2.00
Output / 1M
$12.00

Better overall

Claude Opus 4.7

Grade 87.3 vs 77.4

Cheaper

Gemini 3.1 Pro

55% less, $4.50 vs $10.00 blended

Larger context

Same

1M vs 1M tokens

SWE-bench Verified

Claude Opus 4.7

87.6% vs 80.6%

Head to head

Public benchmarks. Longer is better; each value links to its source.

LMArena TextElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Opus 4.7Claude Opus 4.7: 1,501
Gemini 3.1 ProGemini 3.1 Pro: 1,487
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Opus 4.7Claude Opus 4.7: 1,558
Gemini 3.1 ProGemini 3.1 Pro: 1,447
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Opus 4.7Claude Opus 4.7: 1,551
Gemini 3.1 ProGemini 3.1 Pro: 1,521
SWE-bench Verified% of issues resolved · SWE-bench · Apr 16, 2026 · reference
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Apr 16, 2026 · reference
Terminal-Bench 2.0% of tasks passed · Terminal-Bench · Apr 16, 2026 · reference

Claude Opus 4.7Gemini 3.1 Prov = reported by the model’s maker. — = no public score yet. Arena bars span the range across every model we grade.

What it costs you

Drag to match your monthly usage.

Claude Opus 4.7$2,000 /month
Gemini 3.1 Pro$880 /month

Gemini 3.1 Pro saves you $1,120 a month at this usage, $13,440 a year.

At a glance

AttributeClaude Opus 4.7Gemini 3.1 Pro
Made byAnthropicGoogle
AvailabilityComing soonComing soon
Overall gradeExcellent · 87.3Excellent · 77.4
Overall rank#6 of 67#20 of 67
Input price$5.00 per 1M$2.00 per 1M
Output price$25.00 per 1M$12.00 per 1M
Context window1,000,000 tokens1,000,000 tokens
Reasoning levelsYesYes
Reads imagesYesYes
Model IDclaude-opus-4-7gemini-3.1-pro

Try both with one key

Same endpoint, same key, both hosted in the USA. Change one word to switch models, in Claude Code, Cursor, Cline or your own code.

Get your API key
# Ask either model the same thing
curl https://fullsendai.com/v1/chat/completions \
  -H "Authorization: Bearer $FULLSEND_API_KEY" \
  -d '{"model": "claude-opus-4-7", "messages": [...]}'

# …then swap one word
  -d '{"model": "gemini-3.1-pro", "messages": [...]}'

Questions

Is Claude Opus 4.7 or Gemini 3.1 Pro better?

Claude Opus 4.7 grades 87.3 against 77.4 for Gemini 3.1 Pro, from public benchmarks.

Which is cheaper, Claude Opus 4.7 or Gemini 3.1 Pro?

Gemini 3.1 Pro: $2.00 in and $12.00 out per million tokens, against $5.00 and $25.00 through FullsendAI.

Which has the larger context window?

Neither: both take 1,000,000 tokens.

Can I use both with one API key?

Yes, once they launch: both are coming soon, at the prices shown, and both will use the same FullsendAI key.

Model rankingsAll benchmarksCompare other models

Scores: LMArena (CC BY 4.0), SWE-bench, Scale AI SWE-Bench Pro, Terminal-Bench, and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.